{"id":10122,"date":"2012-04-03T23:59:03","date_gmt":"2012-04-03T23:59:03","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=10122"},"modified":"2012-04-09T22:40:04","modified_gmt":"2012-04-09T22:40:04","slug":"severe-thunderstorms-in-the-dallas-texas-area","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/10122","title":{"rendered":"Severe thunderstorms across northeastern Texas"},"content":{"rendered":"
\"GOES-13<\/a>

GOES-13 10.7 \u00c2\u00b5m IR channel images (click image to play animation)<\/p><\/div>\n

AWIPS images of 4-km resolution GOES-13 10.7 \u00c2\u00b5m IR channel images (above; click image to play animation)<\/em><\/strong> showed the development of a line of severe thunderstorms along an advancing cold frontal boundary as it approached the Dallas\/Fort Worth, Texas region during the afternoon hours on 03 April 2012<\/a><\/strong>. These storms produced a number of tornadoes, hail as large as 2.75 inches in diameter, and damaging winds (SPC storm reports<\/a><\/strong> | NWS Fort Worth outbreak summary<\/a><\/strong>).<\/p>\n

A closer view using a 1-km resolution MODIS 11.0 \u00c2\u00b5m IR channel image at 17:29 UTC (below)<\/em><\/strong> showed much better details regarding the cloud top IR brightness temperature structure of the storms. In particular, note the pronounced cold\/warm (-63\u00c2\u00ba C \/ -52\u00c2\u00ba C, respectively)<\/em> thermal couplet<\/em> exhibited by the storm located just east of Cleburne (station identifier KCPT),<\/em> where the first tornado was reported by spotters at 17:35 UTC.<\/p>\n

\"MODIS<\/a>

MODIS 11.0 \u00c2\u00b5m IR channel image + Surface reports + Surface frontal analysis + Cloud-to-ground lightning strikes<\/p><\/div>\n

A comparison of the 1-km resolution MODIS 11.0 \u00c2\u00b5m IR channel image with the corresponding 4-km resolution GOES-13 10.7 \u00c2\u00b5m IR channel image (below)<\/em><\/strong> demonstrated (1) the advantage of higher spatial resolution for more accurately identifying and quantifying storm top signatures, and (2) the parallax shift<\/a><\/strong> of the storm top features, due to the large viewing angle from the GOES-13 (GOES-East)<\/em> satellite.<\/p>\n

\"GOES-13<\/a>

GOES-13 10.7 \u00c2\u00b5m IR channel image + MODIS 11.0 \u00c2\u00b5m IR channel image<\/p><\/div>\n

A similar MODIS vs GOES-13 IR image comparison about 90 minutes later (below)<\/em><\/strong> again showed how the numerous cold overshooting tops were much more apparent on the 1-km resolution MODIS image.<\/p>\n

\"MODIS<\/a>

MODIS 11.0 \u00c2\u00b5m IR channel image + GOES-13 10.7 \u00c2\u00b5m IR channel image<\/p><\/div>\n

Even greater detail could be seen on a 375-meter resolution Suomi NPP VIIRS 11.450 \u00c2\u00b5m IR channel image at 19:33 UTC (below),<\/strong><\/em> which showed a number of cold overshooting tops with IR brightness temperature values in the -70 to -79 C range (dark black to white color enhancement)<\/em>. Hail of 2.0 inches in diameter was being reported just to the west and just to the east of Dallas\/Fort Worth International Airport (DFW) at 19:30 UTC.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 11.450 \u00c2\u00b5m IR channel image<\/p><\/div>\n

 <\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.64 \u00c2\u00b5m visible channel + 11.450 \u00c2\u00b5m IR channel images (McIDAS)<\/p><\/div>\n

A comparison of the 375-meter resolution Suomi NPP VIIRS 0.64 \u00c2\u00b5m visible channel and 11.450 \u00c2\u00b5m IR channel images can be seen using McIDAS (above)<\/strong><\/em> and AWIPS (below)<\/strong><\/em>.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.64 \u00c2\u00b5m visible channel + 11.450 \u00c2\u00b5m IR channel images (AWIPS)<\/p><\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

AWIPS images of 4-km resolution GOES-13 10.7 \u00c2\u00b5m IR channel images (above; click image to play animation) showed the development of a line of severe thunderstorms along an advancing cold frontal boundary as it approached the Dallas\/Fort Worth, Texas region during the afternoon hours on 03 April 2012. These storms produced a number of tornadoes, […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11,30,12,3,49,48],"tags":[],"class_list":["post-10122","post","type-post","status-publish","format-standard","hentry","category-goes-13","category-lightning","category-modis","category-severe-convection","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/10122","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=10122"}],"version-history":[{"count":19,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/10122\/revisions"}],"predecessor-version":[{"id":10125,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/10122\/revisions\/10125"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=10122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=10122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=10122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}