{"id":16413,"date":"2026-09-29T02:02:28","date_gmt":"2026-09-29T06:02:28","guid":{"rendered":"https:\/\/zobi.alcowep.com\/bourtagshdrevxnls658739\/fire-cloud-with-a-pileus-on-top\/"},"modified":"2026-09-29T02:02:28","modified_gmt":"2026-09-29T06:02:28","slug":"fire-cloud-with-a-pileus-on-top","status":"publish","type":"post","link":"https:\/\/zobi.alcowep.com\/bourtagshdrevxnls658739\/fire-cloud-with-a-pileus-on-top\/","title":{"rendered":"Fire Cloud with a Pileus on Top"},"content":{"rendered":"<h2 style=\"text-align: center\">Fire Cloud with a Pileus on Top<\/h2>\n<p><!-- no image --><\/p>\n<div class=\"hds-module hds-module-full alignfull wp-block-nasa-blocks-secondary-navigation\">\n<div class=\"hds-secondary-navigation-wrapper z-top width-100 padding-0\">\n<div class=\"hds-secondary-navigation width-full border-bottom-1px text-center hds-color-mode-dark hds-module hds-module-full alignfull wp-block-nasa-blocks-hdsnav\"><button type=\"button\" 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grid-container-block bg-spacesuit-white padding-x-0 padding-y-6 margin-x-auto nasa-block-align-wide\">\n<div class=\"padding-x-0 grid-col-12\">\n<p>\t\t\t<!-- curtain view --><\/p>\n<div class=\"img-comparison-slider-parent comparison-view-active\">\n\t\t\t\t<img-comparison-slider><br \/>\n\t\t\t\t\t<img decoding=\"async\" slot=\"first\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg\" alt=\"\"><br \/>\n\t\t\t\t\t<img decoding=\"async\" slot=\"second\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg\" alt=\"\"><br \/>\n\t\t\t\t<\/img-comparison-slider><\/p>\n<div class=\"curtain-view-label-wrapper curtain-view-before\">\n\t\t\t\t\t<span class=\"curtain-view-label\">natural color<\/span>\n\t\t\t\t<\/div>\n<div class=\"curtain-view-label-wrapper curtain-view-after\">\n\t\t\t\t\t<span class=\"curtain-view-label\">swir<\/span>\n\t\t\t\t<\/div>\n<\/div>\n<p>\t\t\t<!-- toggle view --><\/p>\n<div class=\"toggle-comparison-parent\">\n\t\t\t\t<!-- if image_1 is active the show image_1 --><\/p>\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover toggle-view-image toggle-view-before-image toggle-view-active\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1440\" height=\"1165\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1440&#038;h=1165&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-medium_large size-medium_large\" alt=\"Natural-color aerial image of a wildfire in mountainous terrain. Thick gray and brown smoke spreads across much of the landscape, while a towering white pyrocumulus cloud rises at right. A smooth, thin pileus cloud hovers just below the main convective cloud.\" block_context=\"nasa-block\" loading=\"eager\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1440&#038;h=1165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=300&#038;h=243&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=768&#038;h=621&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1024&#038;h=828&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=400&#038;h=324&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=600&#038;h=485&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=900&#038;h=728&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1200&#038;h=971&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\"><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-credits\">NASA Earth Observatory\/Michala Garrison<\/div>\n<\/figcaption><\/div>\n<p>\t\t\t\t<!-- if image_2 is active the show image_2 --><\/p>\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover toggle-view-image toggle-view-after-image\"><img decoding=\"async\" width=\"1440\" height=\"1165\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1440&#038;h=1165&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-medium_large size-medium_large\" alt=\"False-color aerial image of the same wildfire. Active fire fronts appear bright pink, magenta, and yellow around a large brown burned area. A towering white pyrocumulus cloud rises from the fire at right. A smooth, thin pileus cloud obscures part of its top.\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1440&#038;h=1165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=300&#038;h=243&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=768&#038;h=621&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1024&#038;h=828&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=400&#038;h=324&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=600&#038;h=485&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=900&#038;h=728&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1200&#038;h=971&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\"><\/figure>\n<\/div>\n<div class=\"toggle-button-container padding-1\">\n\t\t\t\t\t<button class=\"toggle-view-before-button toggle-comparison-view-active margin-right-1px\"><span class=\"toggle-view-before-label\">natural color<\/span><\/button><button class=\"toggle-view-after-button margin-left-1px\"><span class=\"toggle-view-after-label\">swir<\/span><\/button>\n\t\t\t\t<\/div>\n<\/div>\n<p>\t\t\t<!-- 2-up view --><\/p>\n<div class=\"two-up-view position-relative bg-carbon-10\">\n<div class=\"grid-row\">\n<div class=\"grid-col flex-3 padding-top-4 padding-bottom-4\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img decoding=\"async\" width=\"1440\" height=\"1165\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1440&#038;h=1165&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-medium_large size-medium_large\" alt=\"Natural-color aerial image of a wildfire in mountainous terrain. Thick gray and brown smoke spreads across much of the landscape, while a towering white pyrocumulus cloud rises at right. A smooth, thin pileus cloud hovers just below the main convective cloud.\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1440&#038;h=1165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=300&#038;h=243&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=768&#038;h=621&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1024&#038;h=828&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=400&#038;h=324&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=600&#038;h=485&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=900&#038;h=728&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811.jpg?w=1200&#038;h=971&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\"><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-credits\">NASA Earth Observatory\/Michala Garrison<\/div>\n<\/figcaption><\/div>\n<\/div>\n<div class=\"bg-spacesuit-white width-2px\"><\/div>\n<div class=\"grid-col flex-3 padding-top-4 padding-bottom-4\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img decoding=\"async\" width=\"1440\" height=\"1165\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1440&#038;h=1165&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-medium_large size-medium_large\" alt=\"False-color aerial image of the same wildfire. Active fire fronts appear bright pink, magenta, and yellow around a large brown burned area. A towering white pyrocumulus cloud rises from the fire at right. A smooth, thin pileus cloud obscures part of its top.\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1440&#038;h=1165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=300&#038;h=243&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=768&#038;h=621&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1024&#038;h=828&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=400&#038;h=324&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=600&#038;h=485&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=900&#038;h=728&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir.jpg?w=1200&#038;h=971&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\"><\/figure>\n<\/div>\n<\/div>\n<div class=\"curtain-view-label-wrapper curtain-view-before\">\n\t\t\t\t\t\t<span class=\"curtain-view-label\"><br \/>\n\t\t\t\t\t\t\tnatural color\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n<div class=\"curtain-view-label-wrapper curtain-view-after\">\n\t\t\t\t\t\t<span class=\"curtain-view-label\"><br \/>\n\t\t\t\t\t\t\tswir\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n<\/div>\n<\/div>\n<p>\t\t\t<!-- Under image content --><\/p>\n<div class=\"grid-row flex-row title-row padding-x-2 desktop:padding-x-0 padding-top-2\">\n<div class=\"grid-col-12 tablet:grid-col-6\"><\/div>\n<div class=\"grid-col-12 tablet:grid-col-6 button-row margin-bottom-3 tablet:margin-bottom-0\">\n\t\t\t\t\t<!-- Update onClick handlers --><br \/>\n\t\t\t\t\t<button aria-label=\"Curtain view\" class=\"comparison-view curtain-view-button comparison-view-active padding-bottom-1 margin-left-1\">Curtain<\/button><button aria-label=\"Toggle view\" class=\"comparison-view toggle-view-button padding-bottom-1 margin-left-1\">Toggle<\/button><button aria-label=\"Two-Up view\" class=\"comparison-view two-up-view-button padding-bottom-1 margin-left-1\">2-Up<\/button>\t\t\t\t<\/div>\n<\/div>\n<\/div>\n<p>\t\t<!-- Image detail area --><\/p>\n<div class=\"image-details-panel padding-x-0\">\n<div class=\"before-after-details-divider padding-y-2\">\n\t\t\t\t\t<!-- OnClick handleImageDetailsClick --><button class=\"image-details-toggle-button\"><span>Image Details<\/span><!-- style - if showImageDetails, then transform rotate(180deg), else none --><svg aria-hidden=\"true\" width=\"14\" height=\"15\" viewbox=\"0 0 14 15\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle cx=\"7\" cy=\"7.5\" r=\"6.5\" stroke=\"#58585B\"><\/circle><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M7.0002 8.23854L9.26318 5.95996L9.80019 6.50067L7.0002 9.31996L4.2002 6.50067L4.73721 5.95996L7.0002 8.23854Z\" fill=\"#58585B\"><\/path><\/svg><\/button>\n\t\t\t\t<\/div>\n<p>\t\t\t\t<!-- if showImageDetails, then display --><\/p>\n<div class=\" padding-x-0\">\n<div class=\"grid-row\">\n<div class=\"grid-col flex-2\">\n<div class=\"image-details-wrapper\">\n\t\t\t\t\t\t\t\tA pileus cloud veils part of a pyrocumulus rising from the Sand Creek fire in Montana on August 11, 2026, in images captured by the <a href=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/\" rel=\"noopener\">MASTER<\/a> (MODIS\/ASTER Airborne Simulator) on NASA\u2019s <a href=\"https:\/\/www.nasa.gov\/centers-and-facilities\/armstrong\/er-2-aircraft\/\" rel=\"noopener\">ER-2<\/a>. In the false-color image (right) active fires appear pink and yellow, burned areas brown, clouds white, and smoke blue-purple. MASTER images by RoseAnne Dominguez, annotated by Michala Garrison.\t\t\t\t\t\t\t<\/div>\n<p>\t\t\t\t\t\t\t<!-- File List --><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p class=\"wp-block-paragraph\">In summer 2026, scientists took to the air to intercept and study the towering, smoke-infused clouds that wildland fires sometimes create. But during an <a href=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/data\/flt_html\/2668100.html\" rel=\"noopener\">August 11 flight<\/a> over the <a href=\"https:\/\/inciweb.wildfire.gov\/incident-information\/mtbdf-sand-creek\" rel=\"noopener\">Sand Creek fire<\/a> in Montana, they came back with a bonus\u2014observations of an ephemeral <a href=\"https:\/\/cloudappreciationsociety.org\/cloud-library\/pileus\/\" rel=\"noopener\">pileus cloud<\/a> hovering atop one of the towering fire clouds.<\/p>\n<p class=\"wp-block-paragraph\">Smooth, veil-like pileus clouds\u00a0are well-known to atmospheric scientists and cloud lovers and regarded as signs of especially vigorous <a href=\"https:\/\/www.nesdis.noaa.gov\/our-environment\/severe-weather\/convection\" rel=\"noopener\">convection<\/a>. But researchers rarely observe a pileus cloud interacting with a fire cloud\u2014known as a <a href=\"https:\/\/cloudappreciationsociety.org\/cloud-library\/pyrocumulus\/\" rel=\"noopener\">pyrocumulus<\/a> (pyroCu)\u2014in as much detail as they did on this flight, part of NASA\u2019s <a href=\"https:\/\/espo.nasa.gov\/inspyre\" rel=\"noopener\">INSPYRE<\/a> (Injected Smoke and Pyrocumulonimbus Experiment) campaign.<\/p>\n<p class=\"wp-block-paragraph\">Named after the Latin for \u201ccap,\u201d pileus clouds typically form when rising columns of air collide with a sufficiently moist layer of air aloft. Over the Sand Creek fire, a fast-rising updraft heated by the fire displaced air vertically and forced a horizontal layer of moister air sitting above it upward. The process is similar to how air <a href=\"https:\/\/cloudatlas.wmo.int\/en\/orographic-influences-on-the-windward-side.html\" rel=\"noopener\">forced over a mountain<\/a> can produce clouds, explained Neil Lareau, INSPYRE\u2019s deputy project investigator. \u201cBut in this case, the pyrocumulus itself was the \u2018mountain,\u2019\u201d he said. As the displaced air was pushed upward, it cooled, and its water vapor condensed into a pileus cloud.<\/p>\n<p class=\"wp-block-paragraph\">The pair of images above was captured at 5:40 p.m. local time (23:40 UTC) by the <a href=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/\" data-type=\"link\" data-id=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/\" rel=\"noopener\">MASTER<\/a> (MODIS\/ASTER Airborne Simulator) on one of NASA\u2019s <a href=\"https:\/\/www.nasa.gov\/centers-and-facilities\/armstrong\/er-2-aircraft\/\" rel=\"noopener\">ER-2<\/a>s, a type of high-flying research aircraft. The natural-color image on the left shows the thin, circular pileus atop the turret of smoke and water rising from the spreading wildfire. The image on the right shows the same moment but includes shortwave-infrared (SWIR) observations, which reveal the burned area and actively burning spots along the fire\u2019s perimeter.\u00a0 \u00a0<\/p>\n<div class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-wide\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-none \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=1027&#038;h=1040&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1027\" height=\"1040\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=1027&#038;h=1040&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"Five side-by-side panels from the MASTER instrument show a wildfire and its smoke plume. The four left panels are grayscale views of the scene at progressively longer wavelengths. The rightmost panel is a false-color composite in which active fires appear pink and yellow, burned areas in purple, smoke in purple, and clouds in white.\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=1027&#038;h=1040&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1027w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=296&#038;h=300&#038;fit=crop&#038;crop=faces%2Cfocalpoint 296w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=768&#038;h=778&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=1011&#038;h=1024&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1011w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=50&#038;h=51&#038;fit=crop&#038;crop=faces%2Cfocalpoint 50w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=100&#038;h=101&#038;fit=crop&#038;crop=faces%2Cfocalpoint 100w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=395&#038;h=400&#038;fit=crop&#038;crop=faces%2Cfocalpoint 395w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=593&#038;h=601&#038;fit=crop&#038;crop=faces%2Cfocalpoint 593w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811.jpg?w=889&#038;h=900&#038;fit=crop&#038;crop=faces%2Cfocalpoint 889w\" sizes=\"auto, (max-width: 1027px) 100vw, 1027px\"><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><a href=\"https:\/\/www.earthdata.nasa.gov\/data\/projects\/master\" rel=\"noopener\">MASTER<\/a> captures data at 50 different <a href=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/reference.html\" rel=\"noopener\">spectral bands<\/a>, including at wavelengths of 0.66, 1.61, 3.76, and 11.33 micrometers. The strip on the far right combines information from three spectral bands.<\/div>\n<div class=\"hds-credits\">MASTER\/RoseAnne Dominguez.<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p class=\"wp-block-paragraph\">Pileus clouds are usually quite short-lived, often persisting for only a few minutes before being overtaken by the underlying convection. During this flight, the scientists collected MASTER imagery of the plume roughly every 30 minutes, and the pileus was clearly visible in just one scene. The presence of the cloud hints at what Lareau described as the \u201cextreme updraft dynamics\u201d within the fire plume and pyrocumulus. At the time of the image, he explained, the fire was making a rapid run up the western side of Mount Comet as winds aligned with the drainage channels leading up the mountain.<\/p>\n<p class=\"wp-block-paragraph\">\u201cThe whole scene is amazing,\u201d he said, noting that the science team was fortunate that MASTER\u2019s visible channels captured the rapidly developing pyrocumulus and pileus cloud, its infrared channels captured the fire\u2019s extreme surface behavior, and downward-pointing radars on the airplane studied the cloud structure. \u201cThis scene is in many ways the core of what we\u2019re after with INSPYRE,\u201d he said. \u201cWe were able to connect and map the surface fire dynamics to the convective plume to the cloud processes.\u201d The image above shows the cloud in four of the <a href=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/reference.html\" rel=\"noopener\">50 channels<\/a>, or bands, measured by MASTER. The false-color panel on the far right of the image is a combination of shortwave-infrared and visible observations, similar to the right image at the top of the page.<\/p>\n<p class=\"wp-block-paragraph\">Fires are just one driver of convection that can produce pileus clouds. Vigorous updrafts associated with severe thunderstorms can also produce these wispy clouds. Researchers who participated in NASA\u2019s <a href=\"https:\/\/espo.nasa.gov\/crystalface\" rel=\"noopener\">CRYSTAL-FACE<\/a> (Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment) in Honduras in 2002 <a href=\"https:\/\/acp.copernicus.org\/articles\/6\/1185\/2006\/\" data-type=\"link\" data-id=\"https:\/\/acp.copernicus.org\/articles\/6\/1185\/2006\/\" rel=\"noopener\">reported<\/a> the presence of thin cirrus clouds in the tropopause above thunderstorms that were likely the products of pileus clouds.<\/p>\n<p class=\"wp-block-paragraph\">Volcanic eruptions can produce pileus clouds as well. One of the more stunning images captured by astronauts and published by NASA Earth Observatory is <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/sarychev-peak-eruption-kuril-islands-38985\/\" rel=\"noopener\">this photograph<\/a> of a pileus cloud cloaking the top of a volcanic plume rising from the Sarychev volcano after an eruption in 2009.<\/p>\n<p class=\"wp-block-paragraph\">\n<p class=\"wp-block-paragraph\"><em><a href=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/\" rel=\"noopener\">MASTER<\/a> images by RoseAnne Dominguez (Airborne Sensor Facility), annotated by Michala Garrison.<\/em> <em>Story by Adam Voiland. <\/em><\/p>\n<div class=\"hds-featured-file-list bg-spacesuit-white padding-x-2 tablet:padding-x-3 desktop:padding-x-4 padding-y-5 desktop:padding-y-6 hds-module align wp-block-nasa-blocks-file-list\">\n<div class=\"grid-container grid-container-block padding-0\">\n<div class=\"grid-row width-full margin-bottom-4\">\n<div class=\"grid-col-12 desktop:grid-col-6 margin-bottom-2 desktop:margin-bottom-0\">\n<h2 class=\"heading-22\">\n\t\t\t\t\tDownloads\t\t\t\t<\/h2>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<div class=\"desktop:grid-col display-flex flex-align-center desktop:flex-justify-end\">\n\t\t\t\t\t\t\t\t\t<\/div>\n<\/div>\n<\/div>\n<div class=\"hds-list-row hds-file-list-row\">\n<div class=\"hds-list-thumbnail hds-file-list-thumbnail\">\n<div class=\"hds-list-thumbnail-inner hds-file-list-thumbnail-inner hds-cover-wrapper\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1440\" height=\"1165\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=1440&#038;h=1165&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Natural-color aerial image of a wildfire in mountainous terrain. Thick gray and brown smoke spreads across much of the landscape, while a towering white pyrocumulus cloud rises at right. A smooth, thin pileus cloud hovers just below the main convective cloud.\" block_context=\"nasa-block\" loading=\"lazy\" data-video-loop=\"\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=1440&#038;h=1165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=300&#038;h=243&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=768&#038;h=621&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=1024&#038;h=828&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=400&#038;h=324&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=600&#038;h=485&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=900&#038;h=728&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg?w=1200&#038;h=971&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\"><\/figure>\n<\/div>\n<\/div>\n<div class=\"hds-list-details\">\n<div class=\"hds-list-name hds-file-list-name\">\n<h2 class=\"heading-22\">August 11, 2026: Natural color<\/h2>\n<\/div>\n<div class=\"hds-list-meta\">\n<div class=\"hds-list-meta-item hds-list-date hds-file-list-date\">\n<p class=\"p-sm\">\n<\/div>\n<div class=\"hds-list-meta-item hds-file-list-filetype\">\n<p class=\"p-sm\">JPEG (1.08 MB)<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"hds-list-cta hds-file-list-download\">\n\t\t\t\t\t<a aria-label=\"Download August 11, 2026: Natural color\" href=\"https:\/\/assets.science.nasa.gov\/content\/dam\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_lrg.jpg\" target=\"_blank\" download rel=\"noopener\"><br \/>\n\t\t\t\t\t\t<svg aria-hidden=\"true\" width=\"32\" height=\"32\" viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle cx=\"16\" cy=\"16.0001\" r=\"16\" fill=\"#1C67E3\"><\/circle><path d=\"M15.2357 8.00007L15.2357 16.4829L11.9504 13.4078L10.8801 14.4094L16.0001 19.2001L21.1201 14.4094L20.0499 13.4078L16.7645 16.4829L16.7645 8.00007L15.2357 8.00007Z\" fill=\"white\"><\/path><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M9.6 20.8001V18.4001H8V22.4001H24V18.4001H22.4V20.8001H9.6Z\" fill=\"white\"><\/path><\/svg><br \/>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n<\/div>\n<div class=\"hds-list-row hds-file-list-row\">\n<div class=\"hds-list-thumbnail hds-file-list-thumbnail\">\n<div class=\"hds-list-thumbnail-inner hds-file-list-thumbnail-inner hds-cover-wrapper\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1440\" height=\"1165\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=1440&#038;h=1165&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"False-color aerial image of the same wildfire. Active fire fronts appear bright pink, magenta, and yellow around a large brown burned area. A towering white pyrocumulus cloud rises from the fire at right. A smooth, thin pileus cloud obscures part of its top.\" block_context=\"nasa-block\" loading=\"lazy\" data-video-loop=\"\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=1440&#038;h=1165&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=300&#038;h=243&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=768&#038;h=621&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=1024&#038;h=828&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=400&#038;h=324&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=600&#038;h=485&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=900&#038;h=728&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg?w=1200&#038;h=971&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\"><\/figure>\n<\/div>\n<\/div>\n<div class=\"hds-list-details\">\n<div class=\"hds-list-name hds-file-list-name\">\n<h2 class=\"heading-22\">August 11, 2026: SWIR<\/h2>\n<\/div>\n<div class=\"hds-list-meta\">\n<div class=\"hds-list-meta-item hds-list-date hds-file-list-date\">\n<p class=\"p-sm\">\n<\/div>\n<div class=\"hds-list-meta-item hds-file-list-filetype\">\n<p class=\"p-sm\">JPEG (2.18 MB)<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"hds-list-cta hds-file-list-download\">\n\t\t\t\t\t<a aria-label=\"Download August 11, 2026: SWIR\" href=\"https:\/\/assets.science.nasa.gov\/content\/dam\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafire_master_20260811_swir_lrg.jpg\" target=\"_blank\" download rel=\"noopener\"><br \/>\n\t\t\t\t\t\t<svg aria-hidden=\"true\" width=\"32\" height=\"32\" viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle cx=\"16\" cy=\"16.0001\" r=\"16\" fill=\"#1C67E3\"><\/circle><path d=\"M15.2357 8.00007L15.2357 16.4829L11.9504 13.4078L10.8801 14.4094L16.0001 19.2001L21.1201 14.4094L20.0499 13.4078L16.7645 16.4829L16.7645 8.00007L15.2357 8.00007Z\" fill=\"white\"><\/path><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M9.6 20.8001V18.4001H8V22.4001H24V18.4001H22.4V20.8001H9.6Z\" fill=\"white\"><\/path><\/svg><br \/>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n<\/div>\n<div class=\"hds-list-row hds-file-list-row\">\n<div class=\"hds-list-thumbnail hds-file-list-thumbnail\">\n<div class=\"hds-list-thumbnail-inner hds-file-list-thumbnail-inner hds-cover-wrapper\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1027\" height=\"1009\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=1027&#038;h=1009&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Five side-by-side panels from the MASTER instrument show a wildfire and its smoke plume. The four left panels are grayscale views of the scene at progressively longer wavelengths. The rightmost panel is a false-color composite in which active fires appear pink and yellow, burned areas in purple, smoke in purple, and clouds in white.\" block_context=\"nasa-block\" loading=\"lazy\" data-video-loop=\"\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=1027&#038;h=1009&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1027w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=300&#038;h=295&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=768&#038;h=755&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=1024&#038;h=1006&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=50&#038;h=49&#038;fit=crop&#038;crop=faces%2Cfocalpoint 50w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=400&#038;h=393&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=600&#038;h=589&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg?w=900&#038;h=884&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w\" sizes=\"auto, (max-width: 1027px) 100vw, 1027px\"><\/figure>\n<\/div>\n<\/div>\n<div class=\"hds-list-details\">\n<div class=\"hds-list-name hds-file-list-name\">\n<h2 class=\"heading-22\">August 11, 2026: Spectral bands<\/h2>\n<\/div>\n<div class=\"hds-list-meta\">\n<div class=\"hds-list-meta-item hds-list-date hds-file-list-date\">\n<p class=\"p-sm\">\n<\/div>\n<div class=\"hds-list-meta-item hds-file-list-filetype\">\n<p class=\"p-sm\">JPEG (570.68 KB)<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"hds-list-cta hds-file-list-download\">\n\t\t\t\t\t<a aria-label=\"Download August 11, 2026: Spectral bands\" href=\"https:\/\/assets.science.nasa.gov\/content\/dam\/science\/esd\/eo\/images\/iotd\/2026\/fire-cloud-with-a-pileus-on-top\/montanafirebands_master_20260811_lrg.jpg\" target=\"_blank\" download rel=\"noopener\"><br \/>\n\t\t\t\t\t\t<svg aria-hidden=\"true\" width=\"32\" height=\"32\" viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle cx=\"16\" cy=\"16.0001\" r=\"16\" fill=\"#1C67E3\"><\/circle><path d=\"M15.2357 8.00007L15.2357 16.4829L11.9504 13.4078L10.8801 14.4094L16.0001 19.2001L21.1201 14.4094L20.0499 13.4078L16.7645 16.4829L16.7645 8.00007L15.2357 8.00007Z\" fill=\"white\"><\/path><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M9.6 20.8001V18.4001H8V22.4001H24V18.4001H22.4V20.8001H9.6Z\" fill=\"white\"><\/path><\/svg><br \/>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\">References &#038; Resources <\/h2>\n<ul class=\"wp-block-list\">\n<li>Cloud Appreciation Society, <a href=\"https:\/\/cloudappreciationsociety.org\/cloud-library\/pileus\/\" rel=\"noopener\">Pileus<\/a>. Accessed September 28, 2026.<\/li>\n<li>EarthSky (2026, April 22) <a href=\"https:\/\/earthsky.org\/earth\/pileus-cloud-sign-of-bad-weather\/\" rel=\"noopener\">A pileus cloud means bad weather is on the way<\/a>. Accessed September 28, 2026.<\/li>\n<li>Garrett, T.J., <em>et al.<\/em> (2006) <a href=\"https:\/\/doi.org\/10.5194\/acp-6-1185-2006\" rel=\"noopener\">Convective formation of pileus cloud near the tropopause<\/a>. <em>Atmospheric Chemistry &#038; Physics, <\/em>6(5), 1185\u20131200.<\/li>\n<li>Lareau, N., via X (2026, August 13) <a href=\"https:\/\/x.com\/nplareau\/status\/2088018135475794021\">Here is the corresponding visible imagery, which shows the #pyrocumulus cloud in exquisite detail<\/a>. Accessed September 28, 2026.<\/li>\n<li>NASA Earth Observatory (2026, August 17) <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/chasing-fire-clouds-in-utah\/\" rel=\"noopener\">Chasing Fire Clouds in Utah<\/a>. Accessed September 28, 2026.<\/li>\n<li>NASA Earth Observatory (2016, December 20) <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/a-celebration-of-clouds-from-space\/\" rel=\"noopener\">A Celebration of Clouds from Space<\/a>. Accessed September 28, 2026.<\/li>\n<li>NASA\u2019s Earth Science Project Office, <a href=\"https:\/\/espo.nasa.gov\/inspyre\" data-type=\"link\" data-id=\"https:\/\/espo.nasa.gov\/inspyre\" rel=\"noopener\">INjected Smoke and PYRocumulonimbus Experiment<\/a>. Accessed September 28, 2026.<\/li>\n<li>NASA, <a href=\"https:\/\/science.nasa.gov\/mission\/evs-4\/inspyre\/\" rel=\"noopener\">INSPYRE<\/a>. Accessed September 28, 2026.<\/li>\n<li>NASA, <a href=\"https:\/\/asapdata.arc.nasa.gov\/sensors\/master\/data\/flt_html\/2668100.html\" rel=\"noopener\">MASTER<\/a>. Accessed September 28, 2026.<\/li>\n<\/ul>\n<div class=\"hds-content-lists-inner hds-module hds-module-full alignfull wp-block-nasa-blocks-content-lists\">\n<div class=\"hds-content-lists margin-y-3 padding-x-0 bg-spacesuit-white width-full maxw-full\" data-starting-query=\"{\" block_id data-current-query=\"{\">\n<div class=\"grid-container grid-container-widescreen padding-x-3\">\n<div class=\"grid-row flex-align-start margin-bottom-3\">\n<div class=\"desktop:grid-col-8 margin-bottom-2 desktop:margin-bottom-0\">\n<h2 class=\"section-heading-sm line-height-sm\">You may also be interested in:<\/h2>\n<p class=\"margin-top-0 margin-bottom-2 maxh-tablet\">Stay up-to-date with the latest content from NASA as we explore the universe and discover more about our home planet.<\/p>\n<\/div>\n<\/div>\n<div class=\"grid-row grid-container grid-container-block padding-0 margin-0 flex-justify-center\">\n<div class=\" grid-col-12\">\n<div class=\"grid-row grid-container grid-container-block padding-0\">\n<div class=\"grid-col-12 filter-tags-container\"><\/div>\n<\/div>\n<div class=\"smd-orbit-loader\" role=\"status\" aria-hidden=\"true\">\n<div class=\"orbit-plane\"><span class=\"orbit-dot\"><\/span><\/div>\n<\/div>\n<div class=\"hds-content-items hds-content-items-grid margin-top-2\" aria-live=\"polite\" data-rest-url=\"https:\/\/science.nasa.gov\/wp-json\/smd\/v1\/content-list\">\n<div class=\"hds-content-item content-list-item-post\">\n                    <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/chasing-fire-clouds-in-utah\/\" class=\"hds-content-item-thumbnail\" rel=\"noopener\"><\/p>\n<figure class=\"hds-media-background  content-list-thumbnail\"><img decoding=\"async\" loading=\"lazy\" width=\"300px\" height=\"300px\" data-no-id=\"true\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/chasing-fire-clouds-in-utah\/utahfire_pyrocb_20260803_pho_th.jpg?fit=clip&#038;crop=faces%2Cfocalpoint&#038;w=300 300w\" alt=\"\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/chasing-fire-clouds-in-utah\/utahfire_pyrocb_20260803_pho_th.jpg?fit=clip&#038;crop=faces%2Cfocalpoint&#038;w=300\"><\/figure>\n<\/p>\n<p><\/a><\/p>\n<div class=\"hds-content-item-inner\">\n            <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/chasing-fire-clouds-in-utah\/\" class=\"hds-content-item-heading\" rel=\"noopener\"><\/p>\n<div class=\"hds-a11y-heading-22\">Chasing Fire Clouds in Utah<\/div>\n<\/p>\n<p><\/a><\/p>\n<div class=\"hds-content-item-readtime label margin-bottom-1\">\n                    6 min read                <\/div>\n<p class=\"margin-top-0 margin-bottom-1\">NASA aircraft are sampling smoke lofted high into the atmosphere by one of the most formidable cloud types in the\u2026<\/p>\n<div class=\"display-flex flex-align-center label color-carbon-60 margin-bottom-auto\"><svg version=\"1.1\" class=\"square-2 margin-right-1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" width=\"16px\" height=\"16px\" viewbox=\"0 0 16 16\" xml:space=\"preserve\"><g><g><path d=\"M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z\"><\/path><path d=\"M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z\"><\/path><\/g><\/g><\/svg><span>Article<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"hds-content-item content-list-item-post\">\n                    <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/cloudy-cloak-over-the-northwest\/\" class=\"hds-content-item-thumbnail\" rel=\"noopener\"><\/p>\n<figure class=\"hds-media-background  content-list-thumbnail\"><img decoding=\"async\" loading=\"lazy\" width=\"300px\" height=\"300px\" data-no-id=\"true\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/cloudy-cloak-over-the-northwest\/westcoastfog_tmo_20260919_th.jpg?fit=clip&#038;crop=faces%2Cfocalpoint&#038;w=300 300w\" alt=\"\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/cloudy-cloak-over-the-northwest\/westcoastfog_tmo_20260919_th.jpg?fit=clip&#038;crop=faces%2Cfocalpoint&#038;w=300\"><\/figure>\n<\/p>\n<p><\/a><\/p>\n<div class=\"hds-content-item-inner\">\n            <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/cloudy-cloak-over-the-northwest\/\" class=\"hds-content-item-heading\" rel=\"noopener\"><\/p>\n<div class=\"hds-a11y-heading-22\">Cloudy Cloak Over the Northwest<\/div>\n<\/p>\n<p><\/a><\/p>\n<div class=\"hds-content-item-readtime label margin-bottom-1\">\n                    2 min read                <\/div>\n<p class=\"margin-top-0 margin-bottom-1\">A low-lying cloud layer brought autumn ambience to western Washington and Oregon, while mountainous areas near the coast remained above\u2026<\/p>\n<div class=\"display-flex flex-align-center label color-carbon-60 margin-bottom-auto\"><svg version=\"1.1\" class=\"square-2 margin-right-1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" width=\"16px\" height=\"16px\" viewbox=\"0 0 16 16\" xml:space=\"preserve\"><g><g><path d=\"M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z\"><\/path><path d=\"M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z\"><\/path><\/g><\/g><\/svg><span>Article<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"hds-content-item content-list-item-post\">\n                    <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/smoke-streams-across-eastern-washington\/\" class=\"hds-content-item-thumbnail\" rel=\"noopener\"><\/p>\n<figure class=\"hds-media-background  content-list-thumbnail\"><img decoding=\"async\" loading=\"lazy\" width=\"300px\" height=\"300px\" data-no-id=\"true\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/smoke-streams-across-eastern-washington\/washingtonfires_tmo_20260802_th.jpg?fit=clip&#038;crop=faces%2Cfocalpoint&#038;w=300 300w\" alt=\"\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/2026\/smoke-streams-across-eastern-washington\/washingtonfires_tmo_20260802_th.jpg?fit=clip&#038;crop=faces%2Cfocalpoint&#038;w=300\"><\/figure>\n<\/p>\n<p><\/a><\/p>\n<div class=\"hds-content-item-inner\">\n            <a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/smoke-streams-across-eastern-washington\/\" class=\"hds-content-item-heading\" rel=\"noopener\"><\/p>\n<div class=\"hds-a11y-heading-22\">Smoke Streams Across Eastern Washington<\/div>\n<\/p>\n<p><\/a><\/p>\n<div class=\"hds-content-item-readtime label margin-bottom-1\">\n                    3 min read                <\/div>\n<p class=\"margin-top-0 margin-bottom-1\">Wildland fires in early August 2026 pushed air quality to unhealthy levels, destroyed hundreds of structures, and triggered mandatory evacuations\u2026<\/p>\n<div class=\"display-flex flex-align-center label color-carbon-60 margin-bottom-auto\"><svg version=\"1.1\" class=\"square-2 margin-right-1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" width=\"16px\" height=\"16px\" viewbox=\"0 0 16 16\" xml:space=\"preserve\"><g><g><path d=\"M8,0C3.5,0-0.1,3.7,0,8.2C0.1,12.5,3.6,16,8,16c4.4,0,8-3.6,8-8C16,3.5,12.4,0,8,0z M8,15.2 C4,15.2,0.8,12,0.8,8C0.8,4,4,0.8,8,0.8c3.9,0,7.2,3.2,7.2,7.1C15.2,11.9,12,15.2,8,15.2z\"><\/path><path d=\"M5.6,12c0.8-0.8,1.6-1.6,2.4-2.4c0.8,0.8,1.6,1.6,2.4,2.4c0-2.7,0-5.3,0-8C8.8,4,7.2,4,5.6,4 C5.6,6.7,5.6,9.3,5.6,12z\"><\/path><\/g><\/g><\/svg><span>Article<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"pagination\">\n<nav class=\"hds-pagination hds-pagination--content-lists\" role=\"navigation\" aria-label=\"Pagination Navigation\" data-mid-size=\"2\" data-end-size=\"1\" data-max-pages=\"4\">\n<span aria-current=\"page\" class=\"page-numbers current\" aria-label=\"Current Page, Page 1\" data-page-number=\"1\"><br 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flex-justify-start z-200\">\n<div>\n<h3 class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Subscribe to Earth Observatory Newsletters<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/h3>\n<p class=\"margin-bottom-0 margin-top-2 color-carbon-20-important\">Subscribe to the Earth Observatory and get the Earth in your inbox.<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"585\" height=\"425\" 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\/>\n\t\t\t\t\t\t\t<\/h3>\n<p class=\"margin-bottom-0 margin-top-2 color-carbon-20-important\">NASA\u2019s Earth Observatory brings you the Earth, every day, with in-depth stories and stunning imagery.<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"2500\" height=\"1407\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/iotd-banner.jpg?w=2500&#038;h=1407&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/iotd-banner.jpg?w=2500&#038;h=1407&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2500w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/iotd-banner.jpg?w=300&#038;h=169&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, 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https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/iotd-banner.jpg?w=600&#038;h=338&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/iotd-banner.jpg?w=900&#038;h=507&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/iotd-banner.jpg?w=1200&#038;h=675&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/eo\/images\/iotd\/iotd-banner.jpg?w=2000&#038;h=1126&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2000w\" sizes=\"auto, (max-width: 2500px) 100vw, 2500px\"><\/figure>\n<\/div>\n<p><\/a><br \/>\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/earth\/explore\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<p class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Explore Earth Science<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1920\" height=\"1920\" src=\"https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=1920&#038;h=1920&#038;fit=clip&#038;crop=faces%2Cfocalpoint\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=1920&#038;h=1920&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1920w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=150&#038;h=150&#038;fit=crop&#038;crop=faces%2Cfocalpoint 150w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=300&#038;h=300&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=768&#038;h=768&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=1024&#038;h=1024&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=1536&#038;h=1536&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=50&#038;h=50&#038;fit=crop&#038;crop=faces%2Cfocalpoint 50w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=100&#038;h=100&#038;fit=crop&#038;crop=faces%2Cfocalpoint 100w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=200&#038;h=200&#038;fit=crop&#038;crop=faces%2Cfocalpoint 200w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=400&#038;h=400&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=600&#038;h=600&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=900&#038;h=900&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/images-assets.nasa.gov\/image\/NHQ202212160009\/NHQ202212160009~large.jpg?w=1200&#038;h=1200&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\"><\/figure>\n<\/div>\n<p><\/a><br \/>\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/earth\/data\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<h3 class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Earth Science Data<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/h3>\n<p class=\"margin-bottom-0 margin-top-2 color-carbon-20-important\">Open access to NASA\u2019s archive of Earth science data<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"1536\" height=\"768\" src=\"https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?w=1536\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png 3600w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=300,150 300w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=768,384 768w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=1024,512 1024w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=1536,768 1536w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=2048,1024 2048w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=400,200 400w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=600,300 600w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=900,450 900w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=1200,600 1200w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/biosphere-sea-2008-lrg.png?resize=2000,1000 2000w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\"><\/figure>\n<\/div>\n<p><\/a>\n\t\t\t\t<\/div>\n<\/div>\n<\/div>\n<p class=\"wpematico_credit\"><small>Powered by <a href=\"http:\/\/www.wpematico.com\" target=\"_blank\">WPeMatico<\/a><\/small><\/p>\n<p><a href=\"https:\/\/science.nasa.gov\/earth\/earth-observatory\/fire-cloud-with-a-pileus-on-top\/\" target=\"_blank\" rel=\"noopener\">Get The Details&#8230;<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Scientists captured rare observations of an ephemeral pileus cloud hovering over a smoke-infused cloud that rose above a wildfire in Montana. <a class=\"continue-reading-link\" href=\"https:\/\/zobi.alcowep.com\/bourtagshdrevxnls658739\/fire-cloud-with-a-pileus-on-top\/\"> Continue reading <span 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