At 11:55 a.m. on Friday, the National Weather Service released a freeze warning valid for Saturday between 2 a.m. and 9 a.m. for Franklin, Cumberland, Adams and York counties.

The weather service says, "Sub-freezing temperatures expected."

"Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing," explains the weather service. "Those with agricultural interests should protect sensitive vegetation. Valley locations and sheltered rural areas will experience the coldest temperatures."

Freeze watch or warning - this is what it means

Freeze warnings are issued from May to October (but can be extended if necessary), when low temperatures are expected to be 29-32 degrees. If there is a potential for temperatures to fall into th

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