{"id":53733,"date":"2023-07-27T23:59:00","date_gmt":"2023-07-27T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=53733"},"modified":"2023-07-29T01:47:13","modified_gmt":"2023-07-29T01:47:13","slug":"spoon-fire-in-arizona-produces-a-pyrocumulonimbus-cloud","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/53733","title":{"rendered":"Spoon Fire in Arizona produces a pyrocumulonimbus cloud"},"content":{"rendered":"

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GOES-18 Day Land Cloud Fire RGB (top left), Shortwave Infrared (3.9 \u00b5m, top right), \u201cClean\u201d Infrared Window (10.3 \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<\/strong><\/a> GOES-18 (GOES-West)<\/em> Day Land Cloud Fire RGB<\/strong><\/a>, Shortwave Infrared (3.9 \u00b5m<\/strong><\/a>), \u201cClean\u201d Infrared Window (10.3 \u00b5m<\/strong><\/a>) and Cloud Top Temperature<\/strong><\/a> derived product images (above)<\/strong><\/em> showed that the Spoon Fire<\/strong><\/a> in in east-central Arizona produced a pyrocumulonimbus<\/strong><\/a> (pyroCb) cloud late in the day on 27 July 2023<\/strong><\/a>. Cloud-top 10.3 \u00b5m brightness temperatures reached the -40\u00baC pyroCb threshold (shades of blue) at 0043 UTC — and later cooled to a minimum of -50.48\u00baC (with a corresponding Cloud Top Temperature of -54.11\u00baC) at 0057 UTC (below)<\/strong><\/em>.<\/p>\n

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Cursor-sampled values showing a 10.3 \u00b5m brightness temperature of -50.48\u00baC and a corresponding Cloud Top Temperature of -54.11\u00baC at 0057 UTC [click to enlarge]<\/p><\/div>A plot of rawinsonde data from Flagstaff, Arizona at 0000 UTC on 28 July (below)<\/strong><\/em> indicated that the -50.48\u00baC \/ -54.11\u00baC cloud-top temperature values were close to the height of the Equilibrium Level (EL) of a Most Unstable (MU) air parcel.<\/p>\n

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Plot of rawinsonde data from Flagstaff, Arizona at 0000 UTC on 28 July [click to enlarge]<\/p><\/div>Prior to producing a pyroCb cloud, the Spoon Fire burned very hot — 3.9 \u00b5m brightness temperatures reached 137.88\u00baC (which is the saturation temperature of the GOES-18 ABI<\/strong><\/a> Band 7 detectors) shortly after 2300 UTC, and Fire Power values reached 2842.06 MW at 2334 UTC (below)<\/strong><\/em>. The Fire Power derived product is a component of the GOES Fire Detection and Characterization Algorithm (FDCA<\/strong><\/a>),<\/p>\n

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GOES-18 Day Land Cloud Fire RGB (top left), Shortwave Infrared (3.9 \u00b5m, top right), \u201cClean\u201d Infrared Window (10.3 \u00b5m, bottom left) and Fire Power derived product (bottom right) [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>
\n

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Cursor-sampled values showing a 3.9 \u00b5m brightness temperature of 137.88\u00baC along with a corresponding Fire Power value of 2842.06 MW at 2334 UTC [click to enlarge]<\/p><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"

1-minute Mesoscale Domain Sector GOES-18 (GOES-West) Day Land Cloud Fire RGB, Shortwave Infrared (3.9 \u00b5m), \u201cClean\u201d Infrared Window (10.3 \u00b5m) and Cloud Top Temperature derived product images (above) showed that the Spoon Fire in in east-central Arizona produced a pyrocumulonimbus (pyroCb) cloud late in the day on 27 July 2023. Cloud-top 10.3 \u00b5m brightness temperatures reached the -40\u00baC […]<\/p>\n","protected":false},"author":18,"featured_media":53739,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6,114,45],"tags":[],"class_list":["post-53733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fire-detection","category-goes-18","category-redgreenblue-rgb-images"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53733","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=53733"}],"version-history":[{"count":6,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53733\/revisions"}],"predecessor-version":[{"id":53740,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53733\/revisions\/53740"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/53739"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=53733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=53733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=53733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}