Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75° N Lon: 90.37° W Elev: 604 ft.

Overcast

71°F

22°C

Humidity 81%
Wind Speed NE 8 mph
Barometer 30.02 in (1015.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 21 Sep 3:51 pm CDT
Detailed forecast for

St. Louis City

Tonight
Mostly cloudy with a slight chance of very light drizzle. Lows in the lower 60s. Northeast winds 5 to 10 mph.
Tuesday
Mostly cloudy. A slight chance of very light drizzle in the morning. Highs in the lower 70s. Northeast winds 5 to 10 mph.
Tuesday Night
Mostly cloudy. Lows in the mid 50s. North winds 5 to 10 mph.
Wednesday
Mostly sunny. Highs in the mid 70s. North winds 5 to 10 mph.
Wednesday Night
Partly cloudy. Lows in the mid 50s. Northeast winds 5 to 10 mph.
Thursday And Thursday Night
Partly cloudy. Highs in the mid 70s. Lows in the upper 50s.
Friday And Friday Night
Mostly cloudy. Highs in the upper 70s. Lows in the mid 50s.
Saturday And Saturday Night
Mostly cloudy with a 20 percent chance of showers. Highs in the mid 70s. Lows in the upper 50s.
Sunday Through Monday
Partly cloudy with a 20 percent chance of showers. Highs in the lower 80s. Lows in the upper 50s.



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308 PM CDT Mon Sep 21 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database