Tuesday 9 a.m.
Cold air is blasting into the Northeast this morning. Between midnight and 8 a.m., Philadelphia had a drop from 51 to 35, Boston 49 to 35 and New York City 51 to 35. Showers changed to snow, but no accumulation has occurred on city streets and it will dry out this afternoon.
The high pressure area marking the center of the cold air mass will be over South Carolina by Thursday morning, and the southwesterly flow behind it will run from Texas to New England. At first, it will be sunny during the warmup. However, as much from the Gulf states advances, clouds will pop up, and perhaps showers will reach the I95 corridor Sunday and Monday. No new cold fronts will reach the Northeast in the meantime.
This pressure map shows tight packing of lines where cold air is temporarily dammed up against the Appalachians. Across New York state and New England, the chilly air was flowing south more readily.
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But it will get milder again for a while next week.
Colder Sunday, then milder by midweek
It could feel like spring later this weekend.