St. Louis, Missouri Weather:
Active Weather Warnings
Thursday, August 6, 2026
Stormy Weather
Day 82°
Night 70°
Precipitation 93 %
Wind 7 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (August 6, 2025)
Cloudy Night

Day

91°

Night

70°

Wind

5 mph

Precipitation

6 %

Weather Alerts and Warnings for

Severe Future Possible

Flood Watch

Flood Watch issued August 5 at 1:57AM CDT until August 6 at 10:00AM CDT by NWS St Louis MO
Aug 5, 10:00 PM Aug 6, 10:00 AM
WHAT: Flash flooding caused by excessive rainfall is possible.

WHERE: Portions of Illinois, including the following areas, Adams
IL, Brown IL, Calhoun IL and Pike IL and Missouri, including the
following areas, Audrain MO, Boone MO, Callaway MO, Cole MO,
Crawford MO, Franklin MO, Gasconade MO, Jefferson MO, Knox MO,
Lewis MO, Lincoln MO, Marion MO, Moniteau MO, Monroe MO, Montgomery
MO, Osage MO, Pike MO, Ralls MO, Saint Charles MO, Saint Louis City
MO, Saint Louis MO, Shelby MO, Warren MO and Washington MO.

WHEN: From this evening through Thursday morning.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.

ADDITIONAL DETAILS:
- Training thunderstorms with high rainfall rates are expected
within the watch area late this evening into Thursday morning.
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You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Updated: Aug 5, 1:14 PM Source: NWS Alert