{"id":3465,"date":"2009-09-22T23:59:49","date_gmt":"2009-09-22T23:59:49","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=3465"},"modified":"2009-09-24T20:53:14","modified_gmt":"2009-09-24T20:53:14","slug":"record-rainfall-in-madison-wisconsin","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/3465","title":{"rendered":"Record rainfall in Madison, Wisconsin"},"content":{"rendered":"
\"GOES-12<\/a>

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

Madison, Wisconsin received 3.63 inches<\/strong> (92 mm)<\/strong> of rainfall on 22 September 2009<\/strong><\/a> — much of it within a 4 hour period — which set a record for the highest rainfall amount for any day during the month of September (additional details are available from the NWS Milwaukee\/Sullivan<\/strong><\/a>). AWIPS images of the GOES-12 10.7 \u00c2\u00b5m IR Window channel (above)<\/em><\/strong> showed that the cloud top IR brightness temperatures were rather unremarkable, with only a few areas exhibiting temperatures colder than -50\u00c2\u00ba C<\/strong> (yellow color enhancement)<\/em> during the heavy rainfall event. The 1-km resolution AVHRR Cloud Top Temperature<\/strong><\/a> values were only slightly colder, at -54\u00c2\u00ba C<\/strong> — this corresponded to a AVHRR Cloud Top Height<\/strong><\/a> of 11-12 km.<\/p>\n

GOES-12 visible images (below)<\/em><\/strong> did not show any pronounced cloud top texture or shadowing that would indicate strong convective elements over southern Wisconsin — in fact, there were no<\/strong> cloud-to-ground lightning strikes seen during the day, and no thunder was reported at any of the first order observing stations.<\/p>\n

\"GOES-12<\/a>

GOES-12 visible images<\/p><\/div>\n

\"Blended<\/a>

Blended Total Precipitable Water product<\/p><\/div>\n

The Blended Total Precipitable Water (TPW) product (above)<\/em><\/strong> did reveal that an area of TPW values of 40 mm and greater (red colors)<\/em> developed across northern Illinois and far eastern Iowa after about 08 UTC — this seemed to be associated with a disturbance that developed and moved northward along and ahead of a frontal boundary that was moving slowly eastward across the region. It should be noted that these TPW values were about 175-200% above normal<\/strong><\/a>.<\/p>\n

However, about 5 hours earlier the MODIS TPW product displayed TPW values of 40 mm and higher (red colors)<\/em> over parts of northwestern Illinois, at a time when the Blended TPW product was still only indicating TPW values of 30-35 mm (below)<\/em><\/strong>. This area of higher TPW values over northern Illinois was then advected northward<\/strong><\/a> during the day, and lifted along and ahead of a developing warm frontal boundary<\/a><\/strong>. A cross section<\/a><\/strong> oriented north to south showed a deep column of upward vertical motion (omega values of 10 \u00c2\u00b5bars per second, red colors)<\/em> over southern Wisconsin.<\/p>\n

\"Blended<\/a>

Blended TPW + MODIS TPW products<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Madison, Wisconsin received 3.63 inches (92 mm) of rainfall on 22 September 2009 — much of it within a 4 hour period — which set a record for the highest rainfall amount for any day during the month of September (additional details are available from the NWS Milwaukee\/Sullivan). AWIPS images of the GOES-12 10.7 \u00c2\u00b5m […]<\/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":[22,19,16,12],"tags":[],"class_list":["post-3465","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-goes-12","category-heavy-rain-flooding","category-modis"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/3465","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=3465"}],"version-history":[{"count":18,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/3465\/revisions"}],"predecessor-version":[{"id":3512,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/3465\/revisions\/3512"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=3465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=3465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=3465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}