Recent satellite imagery has been showing high, thin clouds beginning to spread northeastward — a soaking rain was impacting much of the Tennessee Valley and other parts of the South.

The rain, associated with a developing wave of low pressure in the southern states should press northward and eastward as the day wears on.

It is likely going to reach much of Maryland and Delaware between the hours of 9 a.m. and noon and then its presence will be felt across much of central Pennsylvania and New Jersey Monday afternoon.

Farther south and west, including around Baltimore, rain arrival will result in temperatures which will either hold nearly steady or they may even fall into the upper 40s by the start of the afternoon/evening rush.

This will be a “classic case” of overrunning, as moisture climbs over the top of the cool and dry air located near the surface. So, as that rain shield presses northeastward, and Atlantic moisture is funneled into the area on a southeast wind, the weather will deteriorate rather quickly from south to north. General rainfall amounts of 0.50″ to 1.00″ are expected through late Monday night.


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