A Freeze Warning was in effect for McKean county in northern Pennsylvania from 2 a.m. to 10 a.m. Sunday morning. Temperatures were expected to drop down to around 30 degrees there. 

A Frost Advisory was also in effect Sunday morning for parts of Western New York and for northern Pennsylvania from 2 a.m. to 10 a.m. 

The National Weather Service warns that outdoor plants are sensitive to frost and may die if left uncovered.

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