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Elev 558 ft, 38.59 °N, 89.91 °W

O'Fallon, IL Severe Weather Alertstar_ratehome

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Personal Weather Station
Location: O'Fallon, IL
Elevation: 558ft
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River Flood Warning
Issued: 3:02 AM Apr. 29, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT FROM LATE WEDNESDAY NIGHT TO SUNDAY
AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Mississippi River at St. Louis.

* WHEN...From late Wednesday night to Sunday afternoon.

* IMPACTS...At 30.0 feet, Floodwall at Lacledes Landing is closed.
Also at this level, the U.S. Coast Guard may prohibit all
recreational vessel traffic from just above the Chain of Rocks
Canal south entry to just below the mouth of the Meramec River.

* ADDITIONAL DETAILS...
- At 9:00 PM CDT Tuesday the stage was 25.9 feet.
- Forecast...The river is expected to rise above flood stage early
Thursday morning to a crest of 31.0 feet early Friday morning. It
will then fall below flood stage late Saturday morning.
- Flood stage is 30.0 feet.



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

Mississippi River
St. Louis       30.0    25.9    30.1  31.0  30.2  28.1  25.4



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