Active AlertsMackinaw, IL

What: For the Frost Advisory, temperatures as low as 34 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 30 possible.
Where: Portions of central, east central, and west central Illinois.
When: For the Frost Advisory, from 1 AM to 8 AM CDT Sunday. For the Freeze Watch, from late Sunday night through Monday morning.
Impacts: Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.

This hydrologic outlook includes the following river in Illinois: Illinois River The following river information is based on future hydrologic conditions. These outlook stages are provided to show what may be expected if conditions evolve as anticipated. Once there is more certainty about the river forecasts, a flood warning or statement will be issued if the threat materializes.