High pressure building into the Ohio Valley tonight will provide good radiational cooling conditions allowing temperatures to cool down. A cool air mass has settled into the mid-Atlantic but high pressure off to the West will provide clear skies and calm winds. These are two ingredients needed for radiational cooling. This is when all the daytime heating at the surface escapes back into the atmosphere. The air mass is very dry as well. Current dew points are in the 40s and may drop into the 30s overnight in many areas. This air mass along with the clear skies and calm winds will allow the typical cold spots on Delmarva to drop into the 30s. Salisbury will have a good shot at reaching or breaking the record low as well as Wallops Island.
Here are some record lows for Thursday May 29.
Georgetown: 39
Salisbury: 35
Wallops Island: 47
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