Active Weather Alerts
Flash Flood Warning
Issued: 5:27 AM Jul. 21, 2025 – National Weather Service
The National Weather Service in St Louis has issued a * Flash Flood Warning for... Southeastern Calhoun County in southwestern Illinois... Jersey County in southwestern Illinois... Madison County in southwestern Illinois... Northern Saint Clair County in southwestern Illinois... Southern Lincoln County in east central Missouri... Saint Charles County in east central Missouri... Saint Louis County in east central Missouri... Northeastern Warren County in east central Missouri... Saint Louis City in east central Missouri... * Until 330 AM CDT. * At 1227 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. The expected rainfall rate is 2 to 3 inches in 1 hour. Additional rainfall amounts of 2 to 4 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... St. Louis, O'Fallon, St. Charles, St. Peters, Florissant, Chesterfield, Belleville, Wildwood, University City, Ballwin, Granite City, Wentzville, Alton, Kirkwood, Maryland Heights, East St. Louis, Hazelwood, Collinsville and Edwardsville. This includes the following State Parks... Scott Joplin Historic Site, Cuivre River State Park, Confluence State Park, First Missouri State Capitol Historic Site, Pere Marquette State Park and Horseshoe Lake State Park. This includes the following highways... Interstate 64 in Illinois between exits 9 and 19. Interstate 55 in Illinois between exits 23 and 37. Interstate 70 in Illinois between exits 21 and 30. Interstate 70 in Missouri between exits 188 and 231. Interstate 44 in Missouri between exits 276 and 277. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Be aware of your surroundings and do not drive on flooded roads. && FLASH FLOOD...RADAR INDICATED; EXPECTED RAINFALL RATE...2-3 INCHES IN 1 HOUR
Flood Watch
Issued: 12:52 AM Jul. 21, 2025 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Montgomery IL, Pike IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Audrain MO, Lincoln MO, Monroe MO, Montgomery MO, Pike MO, Ralls MO, Saint Charles MO, Saint Louis City MO, Saint Louis MO and Warren MO. * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Conditions are favorable for repeated thunderstorms with heavy rainfall across portions of the watch area which could result in flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
Extreme Heat Warning
Issued: 7:12 PM Jul. 20, 2025 – National Weather Service
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THURSDAY... * WHAT...Dangerously hot conditions with heat index values up to 110. * WHERE...Portions of southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 7 PM CDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. &&
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