Sunday, July 17, 2016

Sunday Evening Weather Update

9:20pm Update:  Severe thunderstorms continue south of Chicago, moving towards Kankakee, IL.  There have been a couple tornado warnings with these supercell thunderstorms as trained spotters have reported funnel clouds and brief tornadoes.  These storms are not going to be a threat for us, but storms developing over central Iowa could slide just south of Rockford between 2am and 4am Monday morning. 

8:10pm Update: Thunderstorms have developed south of I-80 this evening and will continue to slowly sink south through the night.  Additional showers/storms over central Iowa may continue to fester and move east during the early overnight.  These could move in south of Rockford closer to Midnight.

Early Sunday morning thunderstorms rolled through Northern Illinois and Southern Wisconsin packing a little bit of a punch with them.

While damage wasn't quite as extensive as it was in Iowa, there were some reports of downed trees and power lines in a few locations.  The line of thunderstorms weakened once they got past Rockford and towards Chicago.

Below are a few pictures from the storms Sunday morning.  Now our attention turns to what will happen later this evening and night.  Stronger winds within the jet stream are just to our north moving west to east over Minnesota and Wisconsin.  The thunderstorms from Sunday morning took a little bit more energy from our atmosphere that would have been used to generate stronger thunderstorms over the Stateline this afternoon.  It now looks like any active thunderstorms that develop will mostly remain south of the immediate area.

While I can't completely rule out an isolated thunderstorm or two tonight because of the passage of a cold front, we should not see as widespread activity like we did Sunday morning. 

Current radar activity shows very little occurring over the immediate area with showers/storms moving out of Nebraska and over southern Iowa.  With a west to east wind in the upper level of the atmosphere this activity will likely move more east moving into western Illinois.

Bill & Ann Kenney
Scarboro, IL

Brenda Paulson

Paul Hackerson
Mt. Morris, IL

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