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13 WXperts Blog
Wednesday April 30, 2008 at 11:06 am
Spring-Time Chill
A large cell of high pressure moved into the region on Tuesday. This chilly high originated over north-central Canada. Highs on Tuesday only managed the 40s and 50s. Tuesday evening temperatures took a nose dive, as radiational cooling kicked into effect.
Radiational Cooling: The cooling of the Earth's surface. At night, the Earth suffers a net heat loss to space due to terrestrial cooling. This is more pronounced when you have a clear skies, calm winds and dry air in place. (NWS definition)
Wednesday morning lows fell into the low to mid 30s. Many areas were close to records and Lynchburg broke the old record. (See Graphic)
As the high builds off the Southeast coastline temperatures by late week will quickly climb. Look for highs in the 80s by Friday.
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