Sunday weather update

Severe Thunderstorm Watch canceled for Winnebago, Boone and McHenry counties






Heavy rain falling in central DeKalb County near Sycamore.  Could still see pea sized hail and wind gusts to 40 mph.  Cold front is now crossing the Wisconsin/Illinois border and will bring an end to the storm threat within the next hour or two.





Strong thunderstorm moving out of Boone County will impact northern DeKalb County through 10:45pm.  Cities within its path include Kirkland, Kingston and Genoa.  Pea to dime sized hail along with wind gusts 40-50mph are possible.

Severe Thunderstorm Warning for McHenry County until 10:15pm.  Storms currently over Winnebago County are not severe, but could produce pea sized hail.









NEW UPDATED:  Severe Thunderstorm Watch now issued for all of Northern Illinois until 2am


The Severe Thunderstorm Watch for Green County in Wisconsin has been canceled, but continues for Rock and Walworth counties until 10pm.









Severe Thunderstorm Warning for Walworth County until 9:15pm.  This storm is moving southeast 45mph.  Wind gusts to 70 mph and golf ball sized hail is possible.  Take shelter if in the path of this storm

8:10pm Update: Severe storms are now moving into southeast Wisconsin, with towering cumulus clouds beginning to develop in far northern and northeast Illinois.  Still looks like we'll at least see widely scattered storms tonight.






******Storm update from earlier afternoon storms that moved through Chicago*******
(7:16:57 PM) nwsbot: Local Storm Report by NWS LOT: Wood Dale [Dupage Co, IL] other federal reports TSTM WND DMG at 02:35 PM CDT -- *** 1 fatal, 3 inj *** tent collapse occurred at wood dale prairie fest at wood dale junior high school. besides the one fatality...three injuries were serious and more people were transported to hospitals. time estimated using radar.

7:00pm Update: Severe storms continue north of Milwaukee near a deepening low pressure system, and now in central and southern Iowa, but in between we're pretty quiet.  There have been a few cumulus clouds trying to grow in depth, but so far the radar has been quiet.  I'm still going to hold on to the chance for thunderstorms later this evening, but right now it appears as it the best chance for storm coverage will be in southeast Wisconsin and northeast Illinois where storms currently in Wisconsin are more likely to travel.

Timeline of when storms are expected to move into southern Wisconsin and northern Illinois.

5:15pm Update: Thunderstorms continue to develop along a cold front in central Wisconsin, while closer to home a few cumulus clouds have begun to develop.  As the cold front sweeps closer to us tonight, our storm chance will increase, however, at this moment it appears as if the greatest threat for severe weather will remain across southern and southeast Wisconsin and far northern Illinois.  Instability continues to grow with the sunshine we've had, so as storms develop I anticipate them to quickly turn severe with damaging winds being the primary threat.

Until then, heat index values have reached near 100 degrees in a few locations with temperatures rising into the upper 80's and low 90's.  Once the front passes, it will bring an end to the high humidity.









Severe Thunderstorm Watch issued for Green, Rock and Walworth counties in southern Wisconsin until 10pm.
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Earlier this afternoon, a severe thunderstorm warning had been issued for east-central DeKalb County.  This was after that storm quickly developed out of Carroll and Ogle counties.  With it, hail over an inch, heavy downpours and frequent lightning were reported.  That storm is now out of the area and will impact the suburbs of Chicago.

Scanning the skies, additional developing cumulus clouds have been lacking this afternoon across southern Wisconsin and northern Illinois.  This has allowed afternoon temperatures to touch close to 90 degrees!  Giving plenty of fuel for additional thunderstorms later this evening.

The Storm Prediction Center does have part of northern Illinois and southern Wisconsin highlighted under an Enhanced Risk for severe weather.  This means as a cold front comes through later this evening, the risk for strong to severe thunderstorms is likely. 

As of 2:30pm, most of the storm activity has been further north in Wisconsin and Michigan, closer tied to the cold front and low pressure.  It will likely be a couple hours before we begin to see the first sign of storm development closer to the Stateline.  This does mean, though, that as you continue with your Sunday afternoon plans to keep a watchful eye to the sky.  As we already saw with the storm that moved through Ogle and DeKalb counties, it developed rather quickly.  Additional updates will continue to be provided here, so be sure to check back.