{"id":30950,"date":"2018-12-01T23:59:18","date_gmt":"2018-12-01T23:59:18","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=30950"},"modified":"2018-12-08T03:02:46","modified_gmt":"2018-12-08T03:02:46","slug":"tornado-outbreak-in-illinois","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/30950","title":{"rendered":"Tornado outbreak in Illinois"},"content":{"rendered":"

\"GOES-16<\/a>

GOES-16 “Red” Visible (0.64 \u00b5m)<\/em> images, with SPC storm reports plotted in red [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>The largest December tornado outbreak<\/strong><\/a> on record for the state of Illinois occurred on 01 December 2018<\/strong><\/a> (NWS St. Louis<\/strong><\/a> | NWS Lincoln<\/strong><\/a> | NWS Quad Cities<\/strong><\/a>). 1-minute Mesoscale Domain Sector<\/strong><\/a> GOES-16 (GOES-East)<\/em> “Red” Visible (0.64 \u00b5m<\/strong><\/a>) images (above)<\/strong><\/em> showed the development of supercell convection which spawned the severe weather. in addition to the tornadoes, SPC Storm reports<\/strong><\/a> included hail as large as 1.75 inch in diameter and wind gusts of 75 mph.<\/p>\n

GOES-16 “Clean” Infrared Window (10.3 \u00b5m<\/strong><\/a>) images (below)<\/strong><\/em> showed that cloud-top infrared brightness temperatures were as cold as -55\u00baC (darker shades of orange)<\/em> with the more vigorous thunderstorm overshooting tops.<\/p>\n

\"GOES-16<\/a>

GOES-16 “Clean” Infrared Window (10.3 \u00b5m)<\/em> images, with SPC storm reports plotted in red [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>Plots of 18 UTC and 00 UTC rawinsonde data from Lincoln, Illinois (below)<\/strong><\/em> indicated that the coldest overshooting top brightness temperature of -55\u00baC seen in GOES-16 Infrared imagery was representative of a height just above the calculated air parcel Most Unstabe (MU) Equilibrium Level (EL).<\/p>\n

\"Plot<\/a>

Plots of 18 UTC and 00 UTC rawinsonde data from Lincoln, Illinois [click to enlarge]<\/p><\/div>A sequence of MODIS (from Terra and Aqua)<\/em> and VIIRS (from Suomi NPP and NOAA-20)<\/em> Visible and Infrared images (below) <\/strong><\/em>provided 2 higher-resolution views of the pre-storm environment, plus 3 views during\/following convective initiation. Unfortunately, the thunderstorms in Illinois were located along the far eastern edge of the instrument scans in the final 2 images.<\/p>\n

\"Terra\/Aqua<\/a>

Terra\/Aqua MODIS and Suomi NPP\/NOAA-20 VIIRS Visible and Infrared images [click to enlarge]<\/p><\/div>Even though the convection in western Illinois was near the limb of NOAA-20 (mis-labelled as Suomi NPP)<\/em> VIIRS swath at 2007 UTC<\/strong><\/a> — degrading the spatial resolution and introducing some parallax<\/a><\/strong> error — the coldest detected Infrared brightness temperature (-52C) was still several degrees colder than that detected by GOES-16 (below)<\/strong><\/em>. The two images are displayed in different projections, but the enhancements use the same color-vs-temperature breakpoints.<\/p>\n

\"Comparison<\/a>

Comparison of GOES-16 ABI and NOAA-20 VIIRS Infrared Window images at 2007 UTC [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

The largest December tornado outbreak on record for the state of Illinois occurred on 01 December 2018 (NWS St. Louis | NWS Lincoln | NWS Quad Cities). 1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 \u00b5m) images (above) showed the development of supercell convection which spawned the severe weather. in addition to the tornadoes, […]<\/p>\n","protected":false},"author":18,"featured_media":30954,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[70,74,12,78,3,49,71,48],"tags":[],"class_list":["post-30950","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aqua","category-goes-16","category-modis","category-noaa-20","category-severe-convection","category-suomi_npp","category-terra","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30950","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=30950"}],"version-history":[{"count":15,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30950\/revisions"}],"predecessor-version":[{"id":31007,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30950\/revisions\/31007"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/30954"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=30950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=30950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=30950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}