Flood Warning Issued for St. Louis and Surrounding Areas
This alert is no longer in effect.
NOAA issued it on May 10, 2026, 3 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.
A Flood Warning has been issued by the National Weather Service for St. Clair County in Illinois and St. Louis in Missouri, with minor flooding expected on the Mississippi River from late Wednesday night until Sunday evening.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- St. Louis Area
- Issued
- May 10, 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 3 months ago; use the issuing agency's live warning service for current conditions in St. Louis Area.
Alert Details
The Flood Warning was issued by the National Weather Service (NWS) St Louis MO. It is effective starting April 28, 2026, at 11:38 AM CDT.
Affected Areas
The warning affects St. Clair, IL; St. Louis, MO; and St. Louis City, MO. It specifically involves the Mississippi River at St. Louis, as well as at Mel Price LD, near Herculaneum, and at Alton.
What You Should Do
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.
Expected Conditions
Minor flooding is forecast. The river stage at St. Louis is currently at 24.7 feet and is expected to rise above the flood stage of 30.0 feet early Thursday morning to a crest of 31.2 feet Friday morning, then fall below flood stage early Saturday afternoon.
Timeline
The alert is effective from late Wednesday night to Sunday evening. The onset is April 30, 2026, at 3:24 AM CDT, and it ends on May 3, 2026, at 8:00 PM CDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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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 (1,027 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 10, 2026.
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