The National Weather Service released a freeze warning at 12:38 p.m. on Thursday valid from 11 p.m. until Friday 9 a.m. for Lehigh County.

The weather service comments, "Sub-freezing temperatures as low as the upper 20s expected."

"Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing," describes the weather service. "Take steps now to protect tender plants from the cold."

What to do if there is a freeze watch or warning

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 these thresholds, a freeze watch may be issued a few days ahead of time.

According to the weather service, if

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