Areas from the mid-Atlantic to New England will continue to be in the path of drenching downpours and locally gusty thunderstorms into Friday.
The storms will focus along the I-81 and I-95 corridors and will bring the risk of flash flooding and isolated damaging winds. A couple of locations can also be hit with hail.
Sudden heavy rainfall caused flooding in Colonie, New York, near Albany, Wednesday, July 2, 2014. (Photo by Alan Topal)
The storms are forecast to impact cities such as Roanoke, Virginia; Washington, D.C.; Baltimore; Philadelphia; New York City; Hartford, Connecticut; and Boston.
Unlike the storms from Wednesday, the risk of flooding downpours will continue into early Friday morning along I-95 and the coastal mid-Atlantic but also through the day over eastern New England and Long Island. The ongoing risk of downpours will be the result of tropical moisture from Arthur interacting with the front moving slowly in from the west.
Those driving should be prepared for a sudden drop in visibility and seek another route if the road becomes flooded.
As the storms develop over or move through the major metro areas, a ground stop may be issued for a time at the airports.
People outdoors should be on the lookout for changing weather conditions and seek shelter as the storms approach. If you can hear thunder, you are at risk for being struck by lightning.
As Arthur accelerates to the northeast offshore in the Atlantic this weekend, much cooler and less humid air with a clearing sky will sweep eastward from the Appalachians to the East Coast spanning Friday into early Saturday. Southeastern New England and eastern Long Island will be last places to clear.
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