{"id":53324,"date":"2023-07-07T23:59:00","date_gmt":"2023-07-07T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=53324"},"modified":"2023-07-14T17:13:49","modified_gmt":"2023-07-14T17:13:49","slug":"nws-fairbanks-issues-a-record-13-severe-thunderstorm-warnings-in-a-single-day","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/53324","title":{"rendered":"NWS Fairbanks issues a record 13 Severe Thunderstorm Warnings in a single day"},"content":{"rendered":"

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GOES-18 “Clean” Infrared Window (10.3 \u00b5m) and “Red” Visible (0.64 \u00b5m) images, with Severe Thunderstorm Warning polygons plotted in yellow [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>GOES-18 (GOES-West)<\/em> “Clean” Infrared Window (10.3 \u00b5m<\/strong><\/a>) and “Red” Visible (0.64 \u00b5m<\/strong><\/a>) images (above)<\/strong><\/em> included plots of the 15 Severe Thunderstorm Warning polygons issued by NWS Fairbanks<\/strong><\/a> on 07 July 2023 — which was a record number of warnings issued by that forecast office for a single calendar day. The coldest cloud-top 10.3 \u00b5m infrared brightness temperatures were -51C — which corresponded to an altitude around 36,000 feet, according to 0000 UTC rawinsonde data<\/strong><\/a> from Fairbanks (below)<\/strong><\/em>.<\/p>\n

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Plot of rawinsonde data from Fairbanks at 0000 UTC on 08 July [click to enlarge]<\/p><\/div>
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GOES-18 “Clean” Infrared Window (10.3 \u00b5m) image at 0410 UTC [click to enlarge]<\/p><\/div>Recall that when viewing geostationary imagery at high latitudes, parallax<\/strong><\/a> must be taken into account — for example, the cold overshooting top east of Fort Yukon seen on the 0410 UTC image (above)<\/strong><\/em> was actually located over a point about 35 km (22 miles) to the south-southeast (below)<\/strong><\/em>, placing it closer to Circle.<\/p>\n

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GOES-18 parallax correction vector (green) and magnitude (in km, red) for a cloud-top feature at a height of 9.1 km (30,000 feet) [click to enlarge]<\/p><\/div>In GOES-18 Day Cloud Phase Distinction RGB<\/strong><\/a> images (below)<\/strong><\/em>, developing cumulus clouds that were beginning to glaciate exhibited shades of green. Given that many of these thunderstorms occurred in rather remote areas, verification was difficult — but there was one report of tree damage in Chalkyitsik<\/strong><\/a>.<\/p>\n

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GOES-18 Day Cloud Phase Distinction RGB images, with Severe Thunderstorm Warnings plotted in yellow [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

GOES-18 (GOES-West) “Clean” Infrared Window (10.3 \u00b5m) and “Red” Visible (0.64 \u00b5m) images (above) included plots of the 15 Severe Thunderstorm Warning polygons issued by NWS Fairbanks on 07 July 2023 — which was a record number of warnings issued by that forecast office for a single calendar day. The coldest cloud-top 10.3 \u00b5m infrared […]<\/p>\n","protected":false},"author":18,"featured_media":53419,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[114,45,3],"tags":[],"class_list":["post-53324","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-18","category-redgreenblue-rgb-images","category-severe-convection"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53324","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=53324"}],"version-history":[{"count":10,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53324\/revisions"}],"predecessor-version":[{"id":53440,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53324\/revisions\/53440"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/53419"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=53324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=53324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=53324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}