WATERTOWN, N.Y. (WWTI) - The forecasted cold temperatures have caused the National Weather Service to issue a Frost Advisory for Jefferson, Lewis and St. Lawrence counties.

The advisory for all three counties will run from 2 a.m. until 8 a.m.

Tonight's lows could reach into the 30s and will hit their low points in the early-morning hours.

The NWS said frost could kill sensitive outdoor vegetation if left unprotected, and people should take steps now to protect tender plants from the cold.

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