Flood Warning Issued for Meramec River Near Arnold Affecting Jefferson and St. Louis Counties
This alert is no longer in effect.
NOAA issued it on April 6, 2026, 4 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).
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The National Weather Service has issued a flood warning for the Meramec River near Arnold, with minor flooding expected from Sunday afternoon through Tuesday evening.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Jefferson and St. Louis Counties, Missouri
- Issued
- April 6, 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 4 months ago; use the issuing agency's live warning service for current conditions in Jefferson and St. Louis Counties, Missouri.
Alert Details
The National Weather Service in St. Louis has issued a Flood Warning for the Meramec River near Arnold. The warning was issued on March 7 at 7:30 PM CST and remains in effect until Tuesday, March 10, at 6:00 PM CDT.
Affected Areas
The alert specifically covers the Meramec River near Arnold, impacting Jefferson and St. Louis counties in Missouri.
What You Should Do
Motorists are advised to "Turn around, don't drown" when encountering flooded roads, as most flood deaths occur in vehicles. Residents should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at https://water.noaa.gov/wfo/lsx.
Expected Conditions
Minor flooding is forecast for the Meramec River. As of 7:00 PM CST on Saturday, the river stage was 19.7 feet. The river is expected to rise above the flood stage of 24.0 feet tomorrow afternoon, reaching a peak of 24.5 feet early Monday morning.
Regarding specific local impacts, at 24.7 feet, Hawkins Road south of Meramec Bottom Road begins flooding. Forecasts are based on observed precipitation and forecast precipitation for the next 48 hours.
Timeline
- Onset: Sunday afternoon, March 8, at approximately 4:25 PM CST.
- Peak: Early Monday morning, March 9, at 24.5 feet.
- Recession: The river is expected to fall below flood stage late Monday morning.
- Expiration: The warning concludes Tuesday evening, March 10, at 6:00 PM CDT.
Original source: NOAA Official Notice ↗
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