{"id":46824,"date":"2022-06-11T23:59:00","date_gmt":"2022-06-11T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=46824"},"modified":"2022-10-19T01:21:46","modified_gmt":"2022-10-19T01:21:46","slug":"pyrocumulonimbus-clouds-in-alaska","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/46824","title":{"rendered":"Pyrocumulonimbus clouds in Alaska"},"content":{"rendered":"<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/06\/220611_2149utc_2332utc_suomiNPP_viirs_visible_shortwaveInfrared_infraredWindow_AK_pyroCb_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/06\/220611_2149utc_2332utc_suomiNPP_viirs_visible_shortwaveInfrared_infraredWindow_AK_pyroCb_anim.gif\" width=\"640\" height=\"310\" \/><\/a><p class=\"wp-caption-text\">Sequence of Suomi-NPP VIIRS Visible (0.64 \u00b5m), Shortwave Infrared (3.74 \u00b5m) and Infrared Window (11.45 \u00b5m) images at 2149 UTC and 2332 UTC [click to enlarge]<\/p><\/div>A sequence of Suomi-NPP VIIRS Visible (0.64 \u00b5m), Shortwave Infrared (3.74 \u00b5m) and Infrared Window (11.45 \u00b5m) images at 2149 UTC and 2332 UTC <em><strong>(above)<\/strong><\/em> showed &#8220;before&#8221; and &#8220;after&#8221; views of a \u00a0<a href=\"https:\/\/www.nature.com\/articles\/s43247-022-00566-8\"><strong>pyrocumulonimbus<\/strong><\/a> (pyroCb) cloud that developed south of McGrath, Alaska late in the day on 11 June 2022. The coldest cloud-top infrared brightness temperature of the pyroCb cloud on the 2332 image was -48C.<\/p>\n<p>A couple of hours later, <strong>preliminary \/ non-operational<\/strong>\u00a0GOES-18 \u201cRed\u201d Visible\u00a0(0.64 \u00b5m)<em>,<\/em>\u00a0Shortwave Infrared\u00a0(3.9 \u00b5m)\u00a0and \u201cClean\u201d Infrared Window\u00a0(10.35 \u00b5m)\u00a0images\u00a0<em><strong>(below)<\/strong><\/em> showed that the Little Hog Butte Fire &#8212; located southwest of Lake Minchumina (PAMH) &#8212; produced a larger and more long-lived pyroCb cloud, which then drifted east-northeastward from the fire source region. The coldest cloud-top infrared brightness temperature of that pyroCb cloud was around -48C. Smoke from this fire was reducing the surface visibility to 2 miles at times at Lake Minchumina. Particularly noteworthy was the fact that this was the first documented pyroCb over Alaska in 2 years.<\/p>\n<div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/06\/220611_goes18_visible_shortwaveInfrared_infraredWindow_AK_pyroCb_2_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/06\/G18_VIS_SWIR_IR_AK_PYROCB2_11JUN2022_B2713_2022163_035020_0003PANELS_FRAME0000021.GIF\" width=\"640\" height=\"600\" \/><\/a><p class=\"wp-caption-text\">GOES-18 \u201cRed\u201d Visible (0.64 \u00b5m, top), Shortwave Infrared (3.9 \u00b5m, center) and \u201cClean\u201d Infrared Window (10.35 \u00b5m, bottom) images, with hourly plots of surface reports [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/06\/220611_goes18_visible_shortwaveInfrared_infraredWindow_AK_pyroCb_2_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A sequence of Suomi-NPP VIIRS Visible (0.64 \u00b5m), Shortwave Infrared (3.74 \u00b5m) and Infrared Window (11.45 \u00b5m) images at 2149 UTC and 2332 UTC (above) showed &#8220;before&#8221; and &#8220;after&#8221; views of a \u00a0pyrocumulonimbus (pyroCb) cloud that developed south of McGrath, Alaska late in the day on 11 June 2022. The coldest cloud-top infrared brightness temperature [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":46826,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7,6,114,49,48],"tags":[],"class_list":["post-46824","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-quality","category-fire-detection","category-goes-18","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46824","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=46824"}],"version-history":[{"count":3,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46824\/revisions"}],"predecessor-version":[{"id":48422,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46824\/revisions\/48422"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/46826"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=46824"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=46824"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=46824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}