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Frost Advisory — Greene, IL, Macoupin, IL, Montgomery, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO
Issued
1:00 AM CDT · Sat, Oct 17 2026
Expires
9:00 AM CDT · Sat, Oct 17 2026
Issuing Office
NWS KLSX

Affected Areas

Greene, IL Macoupin, IL Montgomery, IL Adams, IL Brown, IL Pike, IL Calhoun, IL Jersey, IL Knox, MO Lewis, MO Shelby, MO Marion, MO Monroe, MO Ralls, MO Pike, MO Audrain, MO Lincoln, MO

Official Bulletin

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...Portions of south central, southwest, and west central
Illinois and central, east central, and northeast Missouri.

* WHEN...From 1 AM to 9 AM CDT Saturday.

* IMPACTS...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.