Cold high pressure will build southeastward into northeast Indiana overnight. Partly cloudy skies and light winds will lead to rapid temperature drops overnight with lows in the upper 20s or lower 30s.
After an extended stretch of unseasonably warm weather the last two weeks, many plants have budded out. This early budding, especially with fruit trees, means plants and trees are vulnerable to freezing conditions.
A freeze warning means subfreezing temperatures are imminent or highly likely. These conditions may kill crops and other sensitive vegetation.