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Freeze Watch hit Lehigh and Northampton counties on Friday

A freeze warning was issued by the National Weather Service at 1:12 a.m. Thursday, effective for Friday between 2 a.m. and 9 a.m. for Lehigh and Northampton counties.

The weather service describes: “freezing temperatures as low as 31 degrees possible.”

“Frost and freezing conditions will kill crops and other sensitive vegetation,” the weather service describes. “Take steps now to protect vulnerable plants from the cold.”

Freezing watch or warning – this is what it means

Frost warnings are issued from May to October (but can be extended if necessary), when low temperatures are expected to reach 29-32 degrees. If there is a chance of temperatures falling within these thresholds, a freeze warning may be issued a few days in advance.

According to the weather service, there is little you can do to protect plants if a frost warning or watch is issued for your region. If you can move your tender plants indoors, do so as frost will likely kill them depending on the severity of the conditions.

Advance Local Weather Alerts is a service from United Robots, which uses machine learning to gather the latest data from the National Weather Service.