Update: Central Pa. under a frost advisory until Friday morning – temperatures to dip to 33

At 12:40 a.m. on Friday, the National Weather Service released an updated frost advisory in effect until 8 a.m. for Northern Clinton, Northern Centre and Northern Lycoming as well as Warren, McKean, Potter, Elk, Cameron, Clearfield, Cambria, Somerset, Tioga and Sullivan counties.

"Temperatures as low as 33 degrees will result in frost formation," can be anticipated according to the weather service. "Increasing cloud cover overnight could limit frost formation in some areas."