{"id":2738,"date":"2009-06-19T17:24:59","date_gmt":"2009-06-19T17:24:59","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=2738"},"modified":"2009-06-25T20:05:36","modified_gmt":"2009-06-25T20:05:36","slug":"mesoscale-convective-system-in-southern-wisconsin","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/2738","title":{"rendered":"Mesoscale Convective System moves across southern Wisconsin"},"content":{"rendered":"
\"GOES-12<\/a>

GOES-12 10.7 \u00c2\u00b5m IR images<\/p><\/div>\n

A cluster of thunderstorms developed over extreme northeastern Iowa and extreme southeastern Minnesota, and merged into a large Mesoscale Convective System (MCS) across southern Wisconsin during the early hours of 19 June 2009<\/a><\/strong>. AWIPS images of the 4-km resolution GOES-12 10.7 \u00c2\u00b5m IR channel (above)<\/em><\/strong> displayed the rapid growth of this MCS, which was responsible for a number of reports of hail and damaging winds (SPC storm reports<\/a><\/strong>) along with heavy rainfall (5.60 inches<\/strong> was reported in Dodgeville, Wisconsin). GOES-12 IR brightness temperatures associated with this MCS were as cold as -75\u00c2\u00ba C.<\/p>\n

Even though the region was well to the north of a stationary frontal boundary, GOES-12 Sounder images (below)<\/em><\/strong> of the Lifted Index (LI), Convective Available Potential Energy (CAPE), and Total Precipitable Water (TPW) indicated that the pre-convective environment across much of southern Wisconsin was characterized by instability (LI values to -10\u00c2\u00ba C and CAPE values to 3958 J\/kg)<\/em> and moisture (TPW values to 51 mm, or 2.00 inches)<\/em>.<\/p>\n

\"GOES-12<\/a>

GOES-12 sounder LI, CAPE, and TPW<\/p><\/div>\n

A 1-km resolution MODIS 11.0 \u00c2\u00b5m IR image at 04:11 UTC (11:11 pm local time) with an overlay of cloud-to-ground lightning strikes (below)<\/em><\/strong> showed the tendency for lightning strikes to cluster around the many “enhanced-v” and “cold\/warm couplet” signatures on the IR image. During the 15-minute interval ending at 04:15 UTC this storm produced 881 negative lightning strikes and 158 positive lightning strikes.<\/p>\n

\"MODIS<\/a>

MODIS 11.0 \u00c2\u00b5m IR image + cloud-to-ground lightning strikes<\/p><\/div>\n

The was a report of baseball-size hail (2.75 inch diameter)<\/em> just to the northwest of Madison, Wisconsin (station identifier KMSN),<\/em> which was near the coldest -80\u00c2\u00ba C MODIS IR cloud top pixel (below)<\/em><\/strong>.<\/p>\n

\"MODIS<\/a>

MODIS 11.0 \u00c2\u00b5m IR image + SPC storm reports<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A cluster of thunderstorms developed over extreme northeastern Iowa and extreme southeastern Minnesota, and merged into a large Mesoscale Convective System (MCS) across southern Wisconsin during the early hours of 19 June 2009. AWIPS images of the 4-km resolution GOES-12 10.7 \u00c2\u00b5m IR channel (above) displayed the rapid growth of this MCS, which was responsible […]<\/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":[15,19,16,30,12,3],"tags":[],"class_list":["post-2738","post","type-post","status-publish","format-standard","hentry","category-goes-sounder","category-goes-12","category-heavy-rain-flooding","category-lightning","category-modis","category-severe-convection"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2738","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=2738"}],"version-history":[{"count":13,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2738\/revisions"}],"predecessor-version":[{"id":2811,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2738\/revisions\/2811"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=2738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=2738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=2738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}