Widespread Summer Heat; Enhanced Severe Weather

A large ridge of high pressure continues to deliver summer heat w/ humidity in several sections of the country. Excessive heat warnings and heat advisories are in effect across the Desert Southwest, south-central Plains, Mid to Lower Mississippi Valley and a small part of the Mid-Atlantic. Meanwhile, an enhanced risk of organized severe thunderstorms is possible from Iowa to Illinois and Indiana. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56° N Lon: 90.15° W Elev: 410 ft.

Fair

77°F

25°C

Humidity 74%
Wind Speed N 12 mph
Barometer 30.09 in (1018.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 20 Aug 1:53 pm CDT
Detailed forecast for

St. Clair County

This Afternoon
Breezy. Showers and thunderstorms likely. Storms may produce damaging winds and large hail. High around 90. Temperature falling into the 80s by late afternoon. South wind around 10 mph with gusts to around 30 mph. Chance of rain 70 percent.
Tonight
Partly cloudy with a 40 percent chance of showers and thunderstorms. Low in the lower 70s. Temperature rising through the 70s by midnight, then near steady overnight. Light wind.
Wednesday
Hot and humid. Partly cloudy with a 50 percent chance of showers and thunderstorms. High around 90. Temperature steady or slowly falling in the afternoon. Highest heat index readings of around 100 early in the afternoon. West wind around 10 mph in the morning shifting to the northwest in the afternoon.
Wednesday Night
Mostly cloudy. Chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Low around 70. North wind around 10 mph in the evening becoming light after midnight. Chance of rain 60 percent.
Thursday
Showers and thunderstorms likely. High in the lower 80s. Light wind. Chance of rain 60 percent.
Thursday Night
Mostly cloudy. Showers and thunderstorms likely in the evening, then chance of showers and thunderstorms after midnight. Low in the upper 60s. Chance of rain 60 percent.
Friday
Mostly cloudy with a 40 percent chance of showers and thunderstorms. High in the lower 80s.
Friday Night And Saturday
Partly cloudy. A 20 percent chance of showers and thunderstorms. Low in the lower 60s. High in the lower 80s.
Saturday Night
Partly cloudy. Low in the mid 60s.
Sunday
Partly cloudy with a 30 percent chance of showers and thunderstorms. High in the mid 80s.
Sunday Night
Partly cloudy with a 20 percent chance of showers and thunderstorms. Low in the upper 60s.
Monday
Partly cloudy with a 30 percent chance of showers and thunderstorms. High in the upper 80s.



Click Map For Forecast
136 PM CDT Tue Aug 20 2019
 
 

Additional Resources

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Hourly Weather Forecast

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