{"id":25625,"date":"2017-10-07T23:59:54","date_gmt":"2017-10-07T23:59:54","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=25625"},"modified":"2017-10-10T02:26:45","modified_gmt":"2017-10-10T02:26:45","slug":"unusual-october-tornado-in-wisconsin","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/25625","title":{"rendered":"Unusual October Tornado in Wisconsin"},"content":{"rendered":"
\"\"<\/a>

GOES-16 ABI Visible (0.64 \u00b5m) Imagery, 2042-2227 UTC on 7 October 2017 (Click to animate)<\/p><\/div>\n

GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing<\/strong><\/p>\n

October is typically not a month when tornadoes are expected in Wisconsin. (And in fact, the month ranks fourth in the numbers of fewest tornadoes nationwide<\/a>). Nevertheless, a brief tornado occurred on the east side of Madison WI late in the afternoon on 7 October (NWS Milwaukee\/Sullivan<\/a>). The visible animation, above, from GOES-16, shows a thin line of weak convection moving through the central part of the state. A slower animation centered on the reported time of the tornado (2200 UTC<\/a>), is below. The dynamic state of the thunderstorm tops is apparent, and the 5-minute time-step may not be sufficient to resolve the small time-scale changes in the tornadic storm (the two GOES-16 Mesoscale sectors that provide 1-minute imagery were covering the pending landfall of Hurricane Nate<\/a> at this time, and were giving severe weather support to Puerto Rico, radar-less in the wake of Hurricane Maria).<\/p>\n

\"\"<\/a>

GOES-16 ABI Visible (0.64 \u00b5m) Imagery, 2152-2222 UTC on 7 October 2017 (Click to enlarge)<\/p><\/div>\n

The Clean Window Channel, below, with the default AWIPS enhancement, shows little cloud-top structure. <\/p>\n

\"\"<\/a>

GOES-16 ABI Infrared (10.3 \u00b5m) Imagery, 1917-2302 UTC on 7 October 2017, default enhancement (Click to animate)<\/p><\/div>\n

Coldest cloud-top brightness temperatures with this event were in the -15\u00ba to -20\u00ba C range, and the default enhancement (with a range from -109\u00ba to 55\u00ba) showed little gradation in that range. By changing the coldest temperature in the enhancement from -109\u00ba C to -43\u00ba C, however, a structure in the cold clouds emerged, as shown below. Do not be afraid to change enhancements!<\/p>\n

\"\"<\/a>

GOES-16 ABI Infrared (10.3 \u00b5m) Imagery, 1917-2302 UTC on 7 October 2017, adjusted enhancement (Click to animate)<\/p><\/div>\n

The NOAA\/CIMSS ProbSevere products for this event is shown below (from this site<\/a>). ProbTor values were negligible; however, ProbWind values for the tornadic cell were around 20-24% leading up to the event. In addition, the cell that produced the tornado had the highest probabilities in the identified cells along the line of convection.<\/em> The single exception occurred at 2235 UTC, after the severe weather event, when the cell to the north briefly (for only five minutes) showed Probabilities exceeding 40%<\/a>.<\/p>\n

\"\"<\/a>

NOAA\/CIMSS ProbTor, 2130-2235 UTC on 7 October 2017 (Click to enlarge)<\/p><\/div>\n


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The National Weather Service in Milwaukee\/Sullivan WI<\/a> determined that the tornado was an EF-0 based on a damage assessment<\/a>. They provided radar imagery at the start of the tornado<\/a>, during the tornado<\/a>, at its end<\/a>, and after dissipation<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing October is typically not a month when tornadoes are expected in Wisconsin. (And in fact, the month ranks fourth in the numbers of fewest tornadoes nationwide). Nevertheless, a brief tornado occurred on the east side of Madison WI late in the afternoon […]<\/p>\n","protected":false},"author":19,"featured_media":25630,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,59,3],"tags":[],"class_list":["post-25625","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-probsevere","category-severe-convection"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/25625","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\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=25625"}],"version-history":[{"count":18,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/25625\/revisions"}],"predecessor-version":[{"id":25674,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/25625\/revisions\/25674"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/25630"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=25625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=25625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=25625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}