Public Safety Alerts

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Public Safety Alerts

Illinois, Missouri Minor Frost Advisory | Effective 10/17/2026 07:02

Frost Advisory issued October 17 at 9:02AM CDT until October 18 at 9:00AM CDT by NWS St Louis MO

Event: Frost Advisory

Desc: * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Portions of south central and southwest Illinois and east central and southeast Missouri. * WHEN...From 1 AM to 9 AM CDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Areas: Bond County IL, Fayette County IL, Clinton County IL, Marion County IL, Washington County IL, Randolph County IL, Madison County IL, St. Clair County IL, Monroe County IL, Franklin County MO, Jefferson County MO, Crawford County MO, Washington County MO, St. Francois County MO, Ste. Genevieve County MO, Iron County MO, Madison County MO, Reynolds County MO

Severity: Minor

Urgency: Expected

Effective: Saturday, October 17, 2026 - 07:02

Expires: Saturday, October 17, 2026 - 22:15

Sender: w-nws.webmaster@noaa.gov

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

Frost Advisory issued October 17 at 1:54AM CDT until October 18 at 9:00AM CDT by NWS St Louis MO

Event: Frost Advisory

Severity: Minor

Urgency: Expected

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

Expires: Saturday, October 17, 2026 - 15:00

Sender: w-nws.webmaster@noaa.gov

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Public Safety Alerts