{"id":6268,"date":"2010-07-26T23:59:11","date_gmt":"2010-07-26T23:59:11","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=6268"},"modified":"2010-08-01T04:47:39","modified_gmt":"2010-08-01T04:47:39","slug":"4th-ef-3-tornado-on-record-in-montana-and-deadliest-since-1923","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/6268","title":{"rendered":"The 4th EF-3 tornado on record in Montana (and the deadliest since 1923)"},"content":{"rendered":"
\"GOES-11<\/a>

GOES-11 (GOES-West)\/ GOES-15 \/ GOES-13 (GOES-East) 10.7 \u00c2\u00b5m IR images<\/p><\/div>\n

Severe thunderstorms propagated southeastward across far northeastern Montana late in the day on 26 July 2010<\/a><\/strong>. McIDAS images of GOES-11 (GOES-West),<\/em> GOES-15, and GOES-13 (GOES-East)<\/em> 10.7 \u00c2\u00b5m IR data (above; each image set is displayed in the naive projection of the respective satellite)<\/em><\/strong> showed that a subtle “enhanced-v” storm top signature first began to appear on GOES-13 imagery around 23:25 UTC, with this signature becoming more apparent by 23:45 UTC on all 3 satellite IR images. In addition, a well-defined cold\/warm thermal couplet (with an IR brightness temperature difference of 11-14\u00c2\u00ba C)<\/em> was displayed on all three satellite IR images around 01:00 UTC. Note that more frequent images were available from GOES-11 and GOES-13, since both of those operational satellites had been placed into Rapid Scan Operations (RSO) mode. GOES-15 is providing images as part of its Post Launch Testing<\/a><\/strong>.<\/p>\n

According to the SPC Storm Reports<\/a><\/strong>, these storms produced hail as large as 4.0 inches in diameter<\/a><\/strong>, and produced a tornado that was responsible for EF-3 damage and 2 fatalities<\/a><\/strong>. This was only the 4th EF3 damage producing tornado on record in Montana, and the deadliest tornado in that state since 1923.<\/p>\n

The GOES-15 satellite (positioned at 89.5\u00c2\u00ba West longitude)<\/em> had the most direct view of the storm — and an animation of 0.63 \u00c2\u00b5m visible channel images (below)<\/em><\/strong> showing some interesting cloud top structure, including several overshooting tops as well as a well-defined anvil plume later in the animation sequence.<\/p>\n

\"GOES-15<\/a>

GOES-15 0.63 \u00c2\u00b5m visible images<\/p><\/div>\n

The GOES-11 (GOES-West) satellite (positioned at 135\u00c2\u00ba West longitude)<\/em> offered a more oblique view of the severe thunderstorms (below)<\/em><\/strong>. Viewing the storms from such a high western angle, one can see the appearance of low-level inflow feeder band clouds as the thunderstorms were intensifying. In addition, since GOES-11 was in Rapid Scan Operations (RSO) mode, more images were available compared to the normal 15-minute scan interval used with GOES-15 above.<\/p>\n

\"GOES-11<\/a>

GOES-11 0.65 \u00c2\u00b5m visible images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Severe thunderstorms propagated southeastward across far northeastern Montana late in the day on 26 July 2010. McIDAS images of GOES-11 (GOES-West), GOES-15, and GOES-13 (GOES-East) 10.7 \u00c2\u00b5m IR data (above; each image set is displayed in the naive projection of the respective satellite) showed that a subtle “enhanced-v” storm top signature first began to appear […]<\/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":[18,11,43,3],"tags":[],"class_list":["post-6268","post","type-post","status-publish","format-standard","hentry","category-goes-11","category-goes-13","category-goes-15","category-severe-convection"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/6268","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=6268"}],"version-history":[{"count":18,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/6268\/revisions"}],"predecessor-version":[{"id":6286,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/6268\/revisions\/6286"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=6268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=6268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=6268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}