A slight risk for parts of Pennsylvania on Thursday.

A few severe storms with wind or hail are possible across the northern High Plains, and from parts of the Midwest into the Northeast this afternoon.

An upper high will be centered over the mid MS into the OH Valley with belt of stronger 40-50 kit midlevel flow across the northern tier of states. The strongest flow will exist from the Great Lakes
into the Northeast, with a progressive embedded shortwave trough. To the west, another shortwave will move from across the northern
Rockies late in the period, with a slight flattening of the upper ridge into the northern High Plains.
Early storms are expected across Lower Michigan and vicinity this morning in association with a shortwave trough and aided by westerly
850 mb flow maintaining a moist air mass. This early activity will play a role in later development to the east and south mainly across
the slight risk area when heating occurs.


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