The worst of this weekend frigid weather is forecast Saturday night into Sunday morning, with potentially dangerous wind chills.
The Lehigh Valley is under a wind-chill advisory this weekend, the National Weather Service said Friday.
Dangerously cold wind chills are forecast this weekend, the weather service says in the advisory in effect 6 p.m. Saturday to 9 a.m. Sunday.
It applies to a region that includes Lehigh, Northampton, Bucks, Warren and Hunterdon counties, and extends throughout much of eastern Pennsylvania and New Jersey, as well as parts of Maryland and Delaware.
Wind chills are forecast 10 to 18 degrees below zero Fahrenheit, as Arctic air is forecast over the area with winds from the northwest at 10 to 20 mph and gusting to nearly 40 mph.
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"Wind chills will begin to drop to dangerous levels late Saturday with the coldest values between midnight and sunrise Sunday," the advisory states. "Wind chills will slowly ease by late Sunday morning.
Winds visualization for 2/13 showing the movement of arctic air into the U.S. See more at https://t.co/34jOBEoTeA pic.twitter.com/ozYkUPqrXk
-- NOAA Satellites (@NOAASatellites) February 12, 2016
The weather service's Philadelphia region forecast office at Mount Holly, New Jersey, says the wind-chill values will potentially reach dangerous levels.
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"The very low wind chills have the potential to result in hypothermia if care is not taken to stay warm and sheltered," the advisory states.
Kurt Bresswein may be reached at kbresswein@lehighvalleylive.com. Follow him on Twitter @KurtBresswein. Find lehighvalleylive.com on Facebook.