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Chicago area weather forecast for Monday, June 21, 2010

We'll see more chances for showers and thunderstorms with the potential for severe storms, heavy rainfall and flooding as we go through the first few days of summer.

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Summer officially starts at 6:28 Monday morning and at that time we could be seeing a cluster of showers and thunderstorms moving through the region.  These storms would be the remnants of a MCS that developed in the plains Sunday evening and moved east overnight.  While there is the chance for some heavy rainfall Monday morning, this could just be the precursor of even bigger things to come.

We're looking for a continuous pool of moist, warm air to stay over northern Illinois throughout the day Monday.  A frontal boundary is forecast to move north out of central Illinois and settle over the region.  At that point it's really just a matter of timing as to when more storms could fire up.  For now we'll grab our umbrellas as the chance for storms is likely Monday.

Our chances for showers and thunderstorms will continue through Wednesday.  Throughout that time the Storm Prediction Center is putting northern Illinois under the slight risk for severe storms with damaging winds being the biggest threats.

We also have the potential for seeing more than 4 inches of rain between Monday and Wednesday night.  With an already saturated ground due to recent rains and some high river levels, flooding could be a big concern.  Needless to say we'll have to keep a close eye on the forecast and update over the next few days.

You can learn more about the forecast by viewing the slideshow.

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