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Elev 510 ft, 38.78 °N, 90.79 °W

Lake St. Louis, MO Severe Weather Alertstar_ratehome

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Personal Weather Station
Location: Lake St. Louis, MO
Elevation: 510ft
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River Flood Warning
Issued: 3:41 AM Apr. 28, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL TUESDAY, MAY 05...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Mississippi River at Grafton.

* WHEN...Until Tuesday, May 05.

* IMPACTS...At 22.5 feet, East end of Main Street in Portage des
Sioux begins flooding near this height.

* ADDITIONAL DETAILS...
- At 10:30 PM CDT Monday the stage was 21.0 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 10:30 PM CDT Monday was 21.0 feet.
- Forecast...The river is expected to rise to a crest of 22.4 feet
early Thursday morning. It will then fall below flood stage
Monday, May 04.
- Flood stage is 20.0 feet.



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All Times CDT    Fld   Observed  Forecasts (7:00 am)
Location         Stg     Stage   Wed   Thu   Fri   Sat   Sun

Mississippi River
Grafton         20.0    21.0    21.9  22.4  22.1  21.4  20.7



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