Weather Alerts For Rock Hill, MO

# HEADLINE -------------------- FROST ADVISORY IN EFFECT UNTIL 9 AM CDT SUNDAY # DETAILS -------------------- WHAT Temperatures as low as 32 will result in frost formation. WHERE Portions of southwest Illinois and central, east central, and northeast Missouri. WHEN Until 9 AM CDT Sunday. IMPACTS Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. ISSUED AT Saturday, October 17, 2026 at 10:22 PM CDT ISSUED BY National Weather Service St Louis MO HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Take steps now to protect tender plants from the cold. # AREAS AFFECTED -------------------- Osage MO, Audrain MO, Calhoun IL, Callaway MO, Gasconade MO, Greene IL, Jersey IL, Lincoln MO, Macoupin IL, Montgomery MO, Pike MO, Saint Charles MO, Saint Louis MO, Warren MO Including the cities of Mexico, Fulton, Saint Charles, and Bowling Green