Monday Afternoon Weather Update

Severe threat shifting east with cold front approaching.  There may be a few showers, isolated storms, south and east of Rockford but our storm threat is coming to an end.  We will likely continue to see the watch canceled early for the remaining counties over the next couple of hours.

Severe Thunderstorm Watch continues for most of Northern Illinois and Southern Wisconsin, but has been canceled for Stephenson, Carroll and Green counties.  Storms now mainly east of Rockford and moving towards Chicago.  Storm threat likely over around 7pm this evening.






5:25pm Update: Watching this cell moving over Kirkland.  Has shown some strength in the past 30 minutes.  Dime to nickel sized hail possible.  Heads up Kingston and Genoa


Thunderstorms continue to quickly develop ahead of a cold front late Monday afternoon.  Already a severe thunderstorm warning had been issued for Boone and McHenry counties with pea sized hail reported in McHenry and Woodstock.

Additional thunderstorms moving into Davis Junction and the DeKalb/Sycamore areas could contain pea sized hail.  However, the storm moving over Sycamore could produce hail up to nickel sized.  This particular cell is moving to the east at 35 mph.  Wind gusts up to 55 mph will also be possible.

Once the front passes by 8pm, our storm threat will quickly decrease.





A Severe Thunderstorm Watch has been issued for Southern Wisconsin and Northern Illinois until 10pm Monday evening.

Temperatures have warmed into the upper 70's and low 80's this afternoon with dew points climbing into the middle and upper 50's.  This combined with a cold front moving through during the late afternoon and evening will likely produced a broken line of strong to severe thunderstorms between 3pm and 5pm over Southern Wisconsin and Northern Illinois.  Initially, the storms may form individually giving a higher threat to large hail.  By the evening, storms will progress into a line with a wind threat becoming the most dominant threat.  This will likely occur east of Rockford.

The image to the left is a simulated radar image at 4pm.  Be prepared for quickly changing conditions this afternoon and evening.  And make sure you have a plan in place if you're going to be out later today to take shelter.