WASHINGTON (AP) -- A snowstorm that dumped more than half a foot of snow on parts of the South, Mid-Atlantic and Northeast is being followed by unusually frigid temperatures.
Forecasters say temperatures are expected to dip into the single digits in much of the region early Tuesday morning. That's unusual after March 1, which is sometimes referred to as the start of "meteorological spring."
According to the National Weather Service, Washington has recorded a low temperature in the single digits in March only two times in recorded history. The previous two were in 1872 and 1873.
Forecasters say a return of the dreaded "polar vortex" is to blame. Jim Lee with the National Weather Service says that's when the jet stream forces frigid arctic air down the East Coast.
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