A Freeze Watch is in effect for northern, east central and southeast Indiana from late Saturday night through Sunday morning, with lows as cold as 31 degrees possible.
A Frost Advisory comes first, for parts of northern Indiana and southwest Michigan early Saturday.
The National Weather Service offices in Northern Indiana and Wilmington, Ohio issued the alerts.
Frost and freeze conditions could kill crops and other sensitive vegetation.
Source: NWS Northern Indiana on X
Frost Advisory: North Central Indiana
A second advisory runs 4 a.m. to 9 a.m. EDT Saturday.
Temperatures as low as 33 degrees will result in frost formation.
It covers Elkhart, Marshall, and Eastern and Western St. Joseph counties.
That includes South Bend, Elkhart, Mishawaka, Goshen and Plymouth.
Frost could harm sensitive outdoor vegetation.
Freeze Watch: Northern Indiana
NWS Northern Indiana says sub-freezing temperatures as low as 31 degrees are possible.
The watch runs late Saturday night through Sunday morning.
Indiana counties: Allen, Miami, Wabash, Huntington, Wells, Adams, Grant, Blackford and Jay, plus the northeast counties listed above.
That includes Fort Wayne, Huntington, Wabash, Marion and Peru.
The watch also covers northwest Ohio: Williams, Fulton, Defiance, Henry, Paulding, Putnam, Van Wert and Allen counties.
Freeze Watch: East Central and Southeast Indiana
NWS Wilmington expects lows in the upper 20s to lower 30s.
The watch runs late Saturday night through Sunday morning.
Indiana counties: Wayne, Fayette, Union, Franklin, Ripley, Dearborn, Ohio and Switzerland.
Cities include Richmond, Connersville, Liberty, Brookville, Batesville, Lawrenceburg, Aurora, Rising Sun, Vevay and Versailles.
The watch also covers northern Kentucky and much of southwest, central and west central Ohio, including Dayton, Cincinnati and Columbus.
Source: NWS Northern Indiana on X
Michigan
NWS Northern Indiana issued a Frost Advisory for four southwest Michigan counties.
The advisory runs 4 a.m. to 9 a.m. EDT Saturday.
Temperatures as low as 33 degrees will result in frost formation.
Counties: Branch, Cass, St. Joseph and Hillsdale.
Cities include Coldwater, Sturgis, Three Rivers, Dowagiac, Cassopolis and Hillsdale.
Sensitive outdoor plants may be killed if left uncovered.
This alert is a Frost Advisory only. The bulletin does not include a Freeze Watch for Michigan.
How to Prepare
A Freeze Watch means sub-freezing temperatures are possible.
Cover or bring in tender plants before Saturday night.
Check back for later forecasts, as a watch can be upgraded to a Freeze Warning.
The NWS Wilmington office has a Fall Frost / Freeze Program page.
For more on freezes, frost and plant damage, see the NWS Cold Weather Safety guide.
For local alerts, visit NWS Northern Indiana.
