Wednesday Evening Severe Update

11:15pm Update: New Severe Thunderstorm Warning for Green County until 11:45pm.  Storm located near Monroe is capable of producing wind gusts close to 60 mph and quarter sized hail.  This storm is moving east at 40 mph.

11:00pm Update: Severe weather threat has ended for most of the Stateline, however, isolated severe thunderstorms will continue into the night.  Right now a Severe Thunderstorm Warning has been issued for Green County until 11:15pm.

Extremely heavy rainfall occurred over far northern Illinois Wednesday evening with radar estimates of three to six inches of rain.  Because of that a Flash Flood Warning has been issued for Jo Daviess, Stephenson, Winnebago, Boone and McHenry counties until 2:30am.  A Flash Flood Emergency has been issued for Winnebago and Boone counties.

We've received numerous reports of cars stalled trying to drive through flooded roadways.  NEVER EVER try to drive through a flooded roadway.  Most storm fatalities that occur are due to flash flooding.  Storms have been ending, but the flooding threat will continue into the night.


(11:17:51 PM) nwsbot: Local Storm Report by NWS LOT: Rockford [Winnebago Co, IL] official nws obs reports HEAVY RAIN of M4.11 INCH at 11:00 PM CDT -- daily total as of 11pm. 3.39 inches in the past 3 hours.

(10:39:13 PM) nwsbot: Local Storm Report by NWS LOT: Rockford [Winnebago Co, IL] trained spotter reports HEAVY RAIN of M4.25 INCH at 10:35 PM CDT -- 0.45 iches of rain fell this morning with an additional 3.80 inches this evening


(10:38:37 PM) nwsbot: Local Storm Report by NWS LOT: Rockford [Winnebago Co, IL] public reports HEAVY RAIN of M5.48 INCH at 10:00 PM CDT -- 5.48 inches measured at rockford
international golf course. 3.48 inches measured in downtown rockford. report from social media.

(10:38:37 PM) nwsbot: Local Storm Report by NWS LOT: Loves Park [Winnebago Co, IL] public reports HEAVY RAIN of M5.69 INCH at 10:00 PM CDT -- report from social media.

(10:38:38 PM) nwsbot: Local Storm Report by NWS LOT: Winnebago [Winnebago Co, IL] public reports HEAVY RAIN of M5.21 INCH at 10:00 PM CDT -- report from social media.

(10:09:48 PM) nwsbot: Local Storm Report by NWS LOT: Pecatonica [Winnebago Co, IL] trained spotter reports HEAVY RAIN of M5.00 INCH at 10:08 PM CDT -- storm total so far. ditches on full.

(10:01:31 PM) nwsbot: Local Storm Report by NWS LOT: Rockford [Winnebago Co, IL] official nws obs reports HEAVY RAIN of M2.37 INCH at 10:00 PM CDT -- 2 hour amount and still raining.

(10:55:18 PM) nwsbot: Local Storm Report by NWS DVN: Stockton [Jo Daviess Co, IL] law enforcement reports TSTM WND DMG at 07:38 PM CDT -- tree branches and power poles down.

(10:57:00 PM) nwsbot: Local Storm Report by NWS DVN: Elizabeth [Jo Daviess Co, IL] law enforcement reports TSTM WND DMG at 09:03 PM CDT -- tree branches down.

(10:47:01 PM) nwsbot: Local Storm Report by NWS DVN: 1 NE Winslow [Stephenson Co, IL] law enforcement reports FLASH FLOOD at 10:13 PM CDT -- portion of mann rd washed out.

(10:52:29 PM) nwsbot: Local Storm Report by NWS DVN: Rock City [Stephenson Co, IL] law enforcement reports FLASH FLOOD at 10:13 PM CDT -- water rescue of person in flood waters.

A Tornado Watch has been issued for Green, Rock and Walworth counties in southern Wisconsin and for Stephenson, Jo Daviess and Carroll counties until 10pm Wednesday evening.

Severe thunderstorms have really developed over the past couple of hours over north-central and central Iowa following thunderstorms from Wednesday morning.  Instability is beginning to build back up over Wisconsin and northwest Illinois due to a few breaks in the cloud cover earlier this afternoon.  A warm front has pulled north of the state line this afternoon which will cause current storms moving into southwest Wisconsin to have the potential to rotate as they move near the warm front.  A line of thunderstorms have developed back further southwest from near Waterloo, IA to southwest of Des Moines.  There, numerous severe thunderstorm warnings and tornado warnings have been issued. 

Storms have also developed near Dubuque, IA and will lift northeast into southwest Wisconsin and northwest Illinois through 7pm this evening.  As we get closer to 8pm this evening, storms out west will likely begin to form into a line or cluster - posing more of a wind threat into the early night.  Time line for thunderstorms appears to be roughly from now through roughly 7pm for storms affecting northwest Illinois - west of line from Madison down through the Quad Cities.  Storm threat then will increase for north-central Illinois closer to 8pm/9pm.