You'll want to take extra care on the roads Monday morning. Leftover moisture from Sunday's heavy rainfall is refreezing in the north and west suburbs, including parts of Bucks, Delaware Montgomery and Chester counties, creating potentially dangerous conditions.
PennDOT crews are patrolling the region and treating roads with salt. Around 180 crews were in Chester, Bucks, Montgomery, Delaware and Philadelphia counties by midnight.
If you're heading out at anytime before 9 a.m. Monday, make sure you check on the road conditions in your area.
"It could be a hazard just to go out to the car," NBC10 First Alert Weather Chief Meteorologist Glenn "Hurricane" Schwartz said. "The ground is still moist due to high humidity and relatively light winds. This should add up to the icy patches, especially on driveways, sidewalks and untreated surfaces such as bridges and overpasses."
The conditions will improve rapidly once the sun comes up. Gusty winds will dry the ground during the day as temperatures rise into the 40's.
Refreezing Timeline
North & West suburbs, Poconos and Lehigh Valley - Now to 9 a.m.
I-95 Corridor - 2 a.m. to 9 a.m.
Delaware - 3 a.m. to 9 a.m.
Jersey Shore - 3 a.m. to 6 a.m.
The temperatures will then rise to 44 degrees Monday afternoon.
Icy roads led to numerous accidents throughout the region Sunday, with some even turning deadly. Icy road conditions led to a massive and deadly pileup involving more than 50 vehicles on Interstate 76 in Montgomery County, Pennsylvania.
At least two people were also killed in a multi-vehicle accident on I-476 near Marple Road in Marple Township. A third deadly crash took the life of a fourth person on Route 55 in Gloucester County, New Jersey. Authorities warned drivers throughout the region to stay home and avoid driving due to the dangerous conditions.
Flooding was reported on Union Mill Road, Walton Street and Hartford Road in Mount Laurel, New Jersey, on the Christina River in Delaware as well as the Pennypack Creek in Philadelphia. Excessive runoff from the heavy rain caused higher levels on small creeks and streams as well as ponding.
While much of the rain tapered off Sunday night, there are already reports of re-freezing in the north and west suburbs, including West Chester Pike in Delaware and Chester counties. Leftover moisture is refreezing on sidewalks and roads, causing more danger for drivers and pedestrians.
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Officials also reported icy conditions Sunday night throughout Montgomery and Bucks counties as well as a three-vehicle accident caused by ice on State Road in Bensalem.
As the week stretches on, temperatures will peak and dip. Tuesday we're in for a cloudy day, a chance of light snow at night and a high of 44.
Wednesday we're in for a chance of a clipper storm which will bring a light mix of snow and rain as well as a high of 39.
Thursday and Friday we're in for cold and dry conditions with highs of 37 and 38. Saturday we're in for a mostly cloudy day with a high of 44 while there's another chance of snow and rain Sunday as well as a high of 39.
Stay with NBC10.com for the latest weather updates.
