Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Severe Thunderstorms With Heavy Rain Possible In The Upper Midwest; Excessive Heat For Central U.S.

Several rounds of strong to severe thunderstorms will be possible from the northern Plains and upper Midwest to the Great Lakes through Friday. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat will grip the central Plains with heat indices approaching 105 to 110 degrees. Very hot and humid conditions are likely to expand into the Mid Atlantic. Read More >

Current conditions at

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

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

Fair

93°F

34°C

Humidity 56%
Wind Speed SW 10 mph
Barometer 29.98 in (1014.3 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 21 Jul 10:54 am CDT
Detailed forecast for

St. Charles County

Rest Of Today
Very hot and humid. Mostly sunny. High around 101. Heat index readings of around 111. Light wind late in the morning becoming southwest around 10 mph in the afternoon.
Tonight
Mostly clear. Low in the upper 70s. Highest heat index readings of around 109 early in the evening. Light wind.
Saturday
Very hot and humid. Mostly sunny. High around 101. Highest heat index readings of around 114 in the afternoon. Southwest wind around 10 mph.
Saturday Night
Partly cloudy with a 30 percent chance of showers and thunderstorms. Low in the mid to upper 70s. Highest heat index readings of around 109 early in the evening. West wind around 10 mph in the evening becoming light after midnight.
Sunday
Hot and humid. Mostly cloudy early in the morning then becoming partly sunny. A 20 percent chance of showers and thunderstorms. High in the lower 90s. Highest heat index readings of around 100 in the afternoon. Light wind.
Sunday Night
Partly cloudy. A 20 percent chance of showers and thunderstorms after midnight. Low around 70.
Monday
Mostly sunny. High in the upper 80s. Temperature steady or slowly falling in the afternoon.
Monday Night And Tuesday
Mostly clear. Low in the upper 60s. High in the upper 80s.
Tuesday Night
Mostly clear with a 20 percent chance of showers and thunderstorms. Low in the upper 60s.
Wednesday
Partly cloudy. High around 90.
Wednesday Night
Mostly clear. Low in the lower 70s.
Thursday
Partly cloudy. High in the lower 90s.



Click Map For Forecast
1021 AM CDT Fri Jul 21 2017
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database