{"id":28587,"date":"2018-06-17T13:46:15","date_gmt":"2018-06-17T13:46:15","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=28587"},"modified":"2018-06-23T18:14:27","modified_gmt":"2018-06-23T18:14:27","slug":"convection-and-flooding-over-northern-wisconsin","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/28587","title":{"rendered":"Convection and Flooding over northern Wisconsin"},"content":{"rendered":"
\"\"<\/a>

GOES-16 ABI Clean Window (10.3 \u00b5m) Infrared Imagery, 0200-0559 UTC on 17 June 2018 (Click to animate)<\/p><\/div>\n

Persistent convection over northern Wisconsin, Minnesota and upper Michigan late Saturday (16 June)\/early Sunday (17 June) caused significant flooding.\u00a0 The animation above shows GOES-16 ABI “Clean Window” Infrared Imagery from 0200-0600 UTC on 17 June.\u00a0 Note the persistence of the cold overshooting tops over western Bayfield County<\/a> in northwestern Wisconsin! A longer Infrared animation (0110-1200 UTC) which includes hourly plots of precipitation type (yellow) and SPC storm reports<\/a> of damaging winds (cyan) is available here<\/a>. 7-day precipitation departures in some areas were 4 to 8 inches above normal<\/a> for that period (or 600% of normal<\/a>).<\/p>\n

This link<\/a> from Wisconsin Emergency Management shows aerial pictures of the flood damage. Of note is the break in US Highway 2 to the west of Ashland WI<\/a>.<\/p>\n

The heavy rains also affected runoff into Lake Superior. MODIS imagery, below, from the MODIS Today<\/a> site (also available from RealEarth<\/a>: Link<\/a>), shows considerable offshore flow of sediment on 19 June (a similar image from 18 June is here<\/a>, with a toggle between the 2 days here<\/a>).<\/p>\n

\"\"<\/a>

True-Color Imagery from Aqua MODIS on 19 June 2018 (Click to enlarge)<\/p><\/div>\n

A Landsat-8 False-Color image, below, showed pockets of flooding (darker blue) adjacent to the Nemadji River in Superior WI on the morning of 19 June — water also cover a portion of US Highway 2\/53<\/a>. The Nemadji River had crested<\/a> in Superior at a record 29.5 feet on the evening of 17 June (NWS Duluth summary<\/a>).<\/p>\n

\"Landsat-8<\/a>

False-Color image from Landsat-8 on 19 June 2018 (Click to enlarge)<\/p><\/div>\n


\n============================ Added 22 June ==============================<\/center> <\/p>\n

NOAA’s Hydrometeorological Design Studies Center (Link<\/a>) created an Exceedance Probability Analysis for this event at 6-hour, 24-hour and 72-hout time spans, available here<\/a> (from this link<\/a>). Probabilities suggest this was an exceedingly rare event.<\/p>\n

The continuation of sediment flow into Lake Superior could be seen in a series of daily MODIS True-Color images here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Persistent convection over northern Wisconsin, Minnesota and upper Michigan late Saturday (16 June)\/early Sunday (17 June) caused significant flooding.\u00a0 The animation above shows GOES-16 ABI “Clean Window” Infrared Imagery from 0200-0600 UTC on 17 June.\u00a0 Note the persistence of the cold overshooting tops over western Bayfield County in northwestern Wisconsin! A longer Infrared animation (0110-1200 […]<\/p>\n","protected":false},"author":19,"featured_media":28588,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[70,74,16,35,55,12,53,45],"tags":[],"class_list":["post-28587","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aqua","category-goes-16","category-heavy-rain-flooding","category-hydrology","category-landsat","category-modis","category-real-earth","category-redgreenblue-rgb-images"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/28587","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=28587"}],"version-history":[{"count":16,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/28587\/revisions"}],"predecessor-version":[{"id":28624,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/28587\/revisions\/28624"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/28588"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=28587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=28587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=28587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}