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Severe Thunderstorms With Heavy Rain Possible from the Upper Midwest to the Mid-Atlantic; Excessive Heat For Central U.S.

Storms will move from the Upper Great Lakes to the Ohio Valley/Lower Great Lakes into the northern Mid-Atlantic through the day. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat warnings and heat advisories are in place for states in the Central Plains, the Southeast, and the Mid-Atlantic. Localized flash flooding may occur in the Southwest. Read More >

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66° N Lon: 90.66° W Elev: 463 ft.

A Few Clouds

81°F

27°C

Humidity 79%
Wind Speed SW 8 mph
Barometer 29.85 in (1009.5 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 22 Jul 5:54 am CDT
Detailed forecast for

Jefferson County

Today
Very hot and humid. Sunny. High around 102. Highest heat index readings of around 111 in the late morning and afternoon. Southwest wind around 10 mph.
Tonight
Partly cloudy with a 30 percent chance of showers and thunderstorms. Low in the upper 70s. Highest heat index readings of around 107 early in the evening. Southwest wind around 10 mph in the evening becoming light after midnight.
Sunday
Hot and humid. Partly sunny with a 20 percent chance of showers and thunderstorms. High in the mid 90s. Highest heat index readings of around 105 in the late morning and afternoon. Light wind.
Sunday Night
Partly cloudy. Low around 70. Highest heat index readings of around 100 early in the evening. Light wind.
Monday
Mostly sunny. High in the lower 90s. Light wind.
Monday Night
Mostly clear. Low around 70.
Tuesday
Partly cloudy. A 30 percent chance of showers and thunderstorms in the afternoon. High around 90.
Tuesday Night
Mostly clear. Low around 70.
Wednesday And Wednesday Night
Partly cloudy. High in the mid 90s. Low in the lower 70s. Heat index readings of around 100.
Thursday Through Friday
Partly cloudy with a 30 percent chance of showers and thunderstorms. High in the mid 90s. Low in the lower 70s. Heat index readings of around 100.



Click Map For Forecast
606 AM CDT Sat Jul 22 2017
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database