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Public Safety Alerts

Illinois, Missouri Minor Frost Advisory | Effective 10/16/2026 23:54

Frost Advisory issued October 17 at 1:54AM CDT until October 17 at 9:00AM CDT by NWS St Louis MO

Event: Frost Advisory

Desc: * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of southwest and west central Illinois and central, east central, and northeast Missouri. * WHEN...Until 9 AM CDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

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

Severity: Minor

Urgency: Expected

Effective: Friday, October 16, 2026 - 23:54

Expires: Saturday, October 17, 2026 - 07:00

Sender: w-nws.webmaster@noaa.gov

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Public Safety Alerts