Flash Flood Warning Issued for St. Charles, St. Louis Counties in Missouri
This alert is no longer in effect.
NOAA issued it on May 29, 2026, 2 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS St Louis has issued a Flash Flood Warning for St. Charles County, St. Louis County, and St. Louis City until 8:15 PM CDT due to heavy rainfall from thunderstorms.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- East Central Missouri
- Issued
- May 29, 2026
- Issuing authority
- NWS St Louis MO
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 2 months ago; use the issuing agency's live warning service for current conditions in East Central Missouri.
Alert Details
A Flash Flood Warning has been issued by the National Weather Service in St Louis MO. The alert is effective from 5:12 PM CDT on May 18, 2026, until 8:15 PM CDT on May 18, 2026.
Affected Areas
The warning covers Saint Charles County, Saint Louis County, and Saint Louis City in east central Missouri. Locations that will experience flash flooding include St. Louis, O'Fallon, St. Charles, St. Peters, Florissant, Chesterfield, Wildwood, University City, Ballwin, Wentzville, Kirkwood, Maryland Heights, Hazelwood, Webster Groves, Ferguson, Manchester, Creve Coeur and Overland. Affected state parks include Babler Memorial State Park, Scott Joplin Historic Site, Route 66 State Park, Castlewood State Park, Confluence State Park and First Missouri State Capitol Historic Site. Impacted highways include Interstate 70 in Missouri between exits 203 and 231 and Interstate 44 in Missouri between exits 261 and 277.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Expected Conditions
Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen with additional rainfall amounts of 0.5 to 2 inches possible. Flash flooding is ongoing or expected to begin shortly.
Timeline
The Flash Flood Warning is in effect from 5:12 PM CDT until 8:15 PM CDT on May 18, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,420 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 29, 2026.
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