{"id":2474,"date":"2009-05-02T23:59:20","date_gmt":"2009-05-02T23:59:20","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=2474"},"modified":"2021-05-11T17:35:49","modified_gmt":"2021-05-11T17:35:49","slug":"microburst-hits-dallas-cowboys-practice-facility","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/2474","title":{"rendered":"Microburst hits Dallas Cowboys football practice facility"},"content":{"rendered":"
\"GOES-12<\/a>

GOES-12 10.7 \u00b5m IR images<\/p><\/div>\n

AWIPS images of the GOES-12 10.7 \u00b5m “IR window” channel (above)<\/strong><\/em> showed the development of severe thunderstorms that moved across the Dallas\/Fort Worth metro area in northeast Texas on 02 May 2009<\/strong><\/a>. Cloud top temperatures quickly cooled into the -70\u00ba to -80\u00baC<\/strong> range (black to light gray color enhancement)<\/em> as the storms began to produce hail (up to 1.75 inch in diameter),<\/em> strong surface winds, and a few tornadoes (SPC storm reports<\/strong><\/a>). At around 20:30 UTC (3:30 pm local time),<\/em> strong winds from a microburst<\/strong><\/a> caused the collapse of a canopy covering a practice field at the Dallas Cowboys football facility at Valley Ranch (located just to the northeast of Dallas\/Fort Worth International Airport, KDFW),<\/em> with several injuries being reported.<\/p>\n

A closer view using a 1-km resolution MODIS 11.0 \u00b5m IR window image (below)<\/strong><\/em> showed greater detail in the cloud top temperature structure, with some pixels as cold as -84\u00baC<\/strong> (violet color enhancement)<\/em>. Note the sharp “upshear” (western)<\/em> edge of the storm’s anvil; in addition, there was a subtle “warm trench” signature surrounding the cold cluster of overshooting tops that was located to the southwest of KDFW — this IR storm top signature is sometimes seen with severe thunderstorms.<\/p>\n

\"MODIS<\/a>

MODIS 11.0 \u00b5m IR image<\/p><\/div>\n

A comparison of the 4-km resolution GOES-12 10.7 \u00b5m IR image with the corresponding 1-km resolution MODIS 11.0 \u00b5m IR window image (below)<\/strong><\/em> demonstrated the advantage of higher spatial resolution for use in the detection of severe storm cloud top signatures. The coldest GOES-12 cloud top temperatures were -77\u00baC<\/strong>, about 7\u00baC warmer than the -84\u00baC<\/strong> seen on the MODIS image.<\/p>\n

\"GOES-12<\/a>

GOES-12 10.7 \u00b5m IR + MODIS 11.0 \u00b5m IR images<\/p><\/div>\n

According to the 00:00 UTC rawinsonde report from Dallas\/Fort Worth (below),<\/strong><\/em> these cold cloud top temperatures associated with the intense overshooting tops were several degree colder than the sounding tropopause temperature of -74\u00baC<\/strong>.<\/p>\n

\"Dallas\/Fort<\/a>

Dallas\/Fort Worth TX rawinsonde report<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

AWIPS images of the GOES-12 10.7 \u00b5m “IR window” channel (above) showed the development of severe thunderstorms that moved across the Dallas\/Fort Worth metro area in northeast Texas on 02 May 2009. Cloud top temperatures quickly cooled into the -70\u00ba to -80\u00baC range (black to light gray color enhancement) as the storms began to produce […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,12,3],"tags":[],"class_list":["post-2474","post","type-post","status-publish","format-standard","hentry","category-goes-12","category-modis","category-severe-convection"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2474","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=2474"}],"version-history":[{"count":16,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2474\/revisions"}],"predecessor-version":[{"id":40891,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2474\/revisions\/40891"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=2474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=2474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=2474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}