Saturday, March 31, 2012

A Couple More Warm Days on the Way

A SEVERE THUNDERSTORM WATCH has been issued for all of north central and northwestern Illinois counties until 4 am cdt early Sunday morning.  A warm front lies to our west while a strong low level southerly jet has developed to our west into Iowa, and will begin to shift to the east overnight. The main threat is large hail up to one and one half inches. There is also the threat of isolated super cell severe thunderstorms capable of producing wind gusts to 70 mph. Some thunderstorms may linger into Sunday morning. The warm front will push through by around 6 am, following soon after by a cool front sweeping southeast across Wisconsin, northeastern Iowa and northern Illinois. The clouds will break up and it will be much warmer in the afternoon with a high reaching into the low 70's.  The front will stall out from southern Indiana across southern Illinois into western Illinois and southeast Iowa by Sunday evening.  Skies will be partly cloudy on Sunday night with a low in the low 50's.  On Monday the front will begin to shift toward the northeast and another surge of moisture will begin to rush northward from the Gulf of Mexico into the Midwest,   It will be unseasonably warm again with a high around 77 degrees.  The front will work it's way into the Stateline during the overnight hours on Monday night bringing the area a good chance of showers and thunderstorms.  Showers could linger into Tuesday as the frontal complex crosses the northern part of Illinois.  It will be cooler under partly cloudy skies with a high in the low 60's.  High pressure is expected to take control from Wednesday through the end of the week providing the area with plenty of sunshine.  Temperatures will top out in the  low 60's.  However , a slow moving low pressure system over the southern plains bears watching.  If it were to trend toward the northeast, the end of the last half of the week could be cooler with inclement weather.

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