{"id":46218,"date":"2022-05-10T21:31:00","date_gmt":"2022-05-10T21:31:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=46218"},"modified":"2022-05-11T18:49:57","modified_gmt":"2022-05-11T18:49:57","slug":"calf-canyon-fire-produces-a-pyrocumulonimbus-cloud-2","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/46218","title":{"rendered":"Calf Canyon Fire produces a pyrocumulonimbus cloud"},"content":{"rendered":"

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GOES-16 \u201cRed\u201d Visible (0.64 \u00b5m, top left), Shortwave Infrared (3.9 \u00b5m, top right), Infrared Window (10.35 \u00b5m, bottom left) and Cloud Top Temperature derived product (bottom right) [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>1-minute Mesoscale Domain Sector GOES-16\u00a0(GOES-East)<\/em> \u201cRed\u201d Visible (0.64 \u00b5m<\/strong><\/a>), Shortwave Infrared (3.9 \u00b5m<\/strong><\/a>), “Clean” Infrared Window (10.35 \u00b5m<\/strong><\/a>) and Cloud Top Temperature<\/strong><\/a> derived product images (above)<\/strong><\/em> showed that the northern portion of the Calf Canyon Fire<\/strong><\/a>\/Hermits Peak Fire<\/strong><\/a> in New Mexico produced a\u00a0pyrocumulonimbus<\/strong><\/a> (pyroCb) cloud on 10 May 2022<\/strong><\/a>. Extreme fire behavior was aided by surface wind gusts in the 42-64 mph<\/strong><\/a> range and very dry air within the boundary layer (along with very dry fuels from the ongoing drought<\/strong><\/a>); these large fires also burned very hot,\u00a0with 3.9 \u00b5m Shortwave Infrared brightness temperatures reaching 138.71\u00baC \u2014 the saturation temperature of\u00a0<\/span>ABI<\/span><\/span><\/strong><\/a> Band 7 detectors.<\/span> Coldest 10.35 \u00b5m cloud-top brightness temperatures exhibited by the pyroCb cloud were around -45\u00baC (lighter blue enhancement), with the Cloud Top Temperature product showing values as cold as -54\u00baC (red pixels).<\/p>\n

In a comparison of NOAA-20 VIIRS True Color RGB, False Color RGB and Infrared Window (11.45 \u00b5m) images valid at 2057 UTC (below)<\/strong><\/em>, the coldest cloud-top infrared brightness temperature was -59\u00baC. These images were acquired and processed using the Direct Broadcast ground station at SSEC\/CIMSS.<\/p>\n

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NOAA-20 VIIRS True Color RGB, False Color RGB and Infrared Window (11.45 \u00b5m) images [click to enlarge]<\/p><\/div>During the preceding nighttime hours, a toggle between Suomi-NPP VIIRS Day\/Night Band and Shortwave Infrared images valid at 0847 UTC or 2:47 am MDT (below)<\/strong><\/em> showed the bright emitted light and hot thermal signature of active fires along the periphery of the burn area — especially along the northern fire front, which eventually produced the pyroCb cloud.<\/p>\n

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Suomi-NPP VIIRS Day\/Night Band (0.7 \u00b5m) and Infrared Window (11.45 \u00b5m) images [click to enlarge]<\/p><\/div>An evolution of the recent New Mexico wildfires using a series of VIIRS Day\/Night Band images is available at this blog post<\/strong><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

1-minute Mesoscale Domain Sector GOES-16\u00a0(GOES-East) \u201cRed\u201d Visible (0.64 \u00b5m), Shortwave Infrared (3.9 \u00b5m), “Clean” Infrared Window (10.35 \u00b5m) and Cloud Top Temperature derived product images (above) showed that the northern portion of the Calf Canyon Fire\/Hermits Peak Fire in New Mexico produced a\u00a0pyrocumulonimbus (pyroCb) cloud on 10 May 2022. Extreme fire behavior was aided by […]<\/p>\n","protected":false},"author":18,"featured_media":46221,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6,74,78,45,49,48],"tags":[],"class_list":["post-46218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fire-detection","category-goes-16","category-noaa-20","category-redgreenblue-rgb-images","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=46218"}],"version-history":[{"count":9,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46218\/revisions"}],"predecessor-version":[{"id":46259,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46218\/revisions\/46259"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/46221"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=46218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=46218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=46218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}