The National Weather Service of Northern Indiana has issued a frost advisory for tonight.

A strong high pressure system over the northern plains will move slowly southeast tonight. Clearing skies and light winds are expected, which will cause temperatures in the area to fall into the lower to middle 30s with some frost forming by morning.

The frost advisory is in effect from 2 a.m. to 8 a.m. Saturday.

The frost may kill sensitive outdoor plants, if left uncovered.