A Marginal Risk of severe thunderstorms generally south of Interstate-80 Tuesday

Update Noon CDT…

The Marginal Risk of Severe Thunderstorms area for tonight has been shifted farther south across the southern half of Illinois and Indiana.

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The National Storm Prediction Center has the portion of the Chicago area generally along and south of Interstate-80 for a Marginal Risk of severe thunderstorms later this Monday night and Tuesday (dark-green-shaded area depicting a 5% chance of severe storms within 25 miles of a given location shown on the highlighted map). The primary risk in our area is for damaging winds and large hail.

A center of low pressure is forecast to develop in the central plains today and intensify, as it moves northeast through northern Illinois Tuesday.  Strong thunderstorms are expected to occur north of the associated warm front through central Illinois tonight/early Tuesday. Then a line of potentially severe thunderstorms is forecast to develop along and ahead of the low pressure and associated cold front as the system moves through our area from the west Tuesday afternoon. The greater risk of severe storms Tuesday will be farther south and east along the Ohio River Valley.

Severe weather risk Tuesday…