A few breaks in the cloud cover were noted Wednesday afternoon allowing for a little more sunshine as temperatures warmed into the low 50s in some locations. But cloud cover will quickly move back in as rain showers overspread central Illinois late Wednesday afternoon.
Low pressure located over Nebraska will move northeast Wednesday evening, reaching northern Illinois by daybreak Thursday. Increasing moisture will eventually overcome the drier air in place leading to showers overspreading the region later this evening.
The heavier rainfall is likely to remain focused across northeast Illinois and Indiana, but a steady rain is expected locally through the night. Rainfall totals will reach half an inch area wide before coming to an end Thursday. Lingering low level moisture and lighter winds will cause some areas of fog to form which could reduce visibility during the morning commute for a time.
Most of the accumulating rainfall will begin to wrap up mid-morning Thursday with cloudy skies expected throughout the afternoon. Temperatures Wednesday evening will drop into the mid-40s, possibly rising through start of Thursday. Winds will then shift to the northwest following the passage of the surface low during the morning which will keep temperatures in the low 50s.
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