06/01/2026
Reminder: Today is Monthly Siren Testing Day
St. Louis County will conduct its monthly outdoor warning siren test at 11:00 a.m. This is only a test of the outdoor warning system. Sirens are meant to warn people outdoors to move inside and seek additional weather information.
Use today as a quick preparedness check:
• Make sure emergency alerts are enabled on your phone
• Review your safe place at home, work, or school
• Have multiple ways to receive warnings
06/01/2026
SLCOEM Alert:
Flood Advisory issued June 1 at 7:45AM CDT until June 1 at 10:45AM CDT by NWS St Louis MO
http://www.weather.gov
06/01/2026
SLCOEM Alert:
Severe Thunderstorm Watch issued June 1 at 3:34AM CDT until June 1 at 9:00AM CDT by NWS St Louis MO
http://www.weather.gov
05/18/2026
SLCOEM Alert:
Flash Flood Warning
Flash Flood Warning issued May 18 at 5:12PM CDT until May 18 at 8:15PM CDT by NWS St Louis MO
http://www.weather.gov
05/18/2026
SLCOEM Alert:
Flash Flood Warning
Flash Flood Warning issued May 18 at 5:06PM CDT until May 18 at 9:00PM CDT by NWS St Louis MO
http://www.weather.gov
05/18/2026
SLCOEM Alert:
Flood Advisory issued May 18 at 1:22PM CDT until May 18 at 7:15PM CDT by NWS St Louis MO
http://www.weather.gov
05/09/2026
SLCOEM Alert:
Dense Fog Advisory issued May 9 at 2:01AM CDT until May 9 at 8:00AM CDT by NWS St Louis MO
05/04/2026
Due to overcast skies and rain in the forecast, today’s outdoor warning siren test has been cancelled.
Even though the sirens won’t sound today, this is still a great opportunity to review your emergency plans and check your preparedness kit. Make sure supplies are stocked, batteries are fresh, and everyone in your household knows what to do in case of severe weather.
Stay weather aware and stay prepared.
04/30/2026
SLCOEM Alert:
Flood Warning
Flood Warning issued April 30 at 5:08AM CDT until May 2 at 6:00AM CDT by NWS St Louis MO
http://www.weather.gov
04/28/2026
SLCOEM Alert:
Flood Warning
Flood Warning issued April 28 at 11:38AM CDT until May 3 at 8:00PM CDT by NWS St Louis MO
http://www.weather.gov