Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 15, 09:00 PM CDT

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

87°F

31°C

Humidity	75%
Wind Speed	S 5 mph
Barometer	29.90 in (1012.1 mb)
Dewpoint	78°F (26°C)
Visibility	10.00 mi
Heat Index	100°F (38°C)
Last update	13 Aug 10:53 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Cahokia / St. Louis, St. Louis Downtown Airport IL

Extreme Heat Warning August 13, 11:10am until August 15, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 13, 11:10am until August 15, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Today
High: 96 °F
Slight Chance
T-storms
Tonight
Low: 77 °F
Slight Chance
T-storms then
Partly Cloudy
Friday
High: 98 °F
Hot
Friday Night
Low: 77 °F
Mostly Clear
Saturday
High: 100 °F
Hot
Saturday Night
Low: 78 °F
Mostly Clear
Sunday
High: 98 °F
Hot
Sunday Night
Low: 74 °F
Chance
T-storms

Detailed Forecast

Today

A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 96. Heat index values as high as 111. South wind 5 to 7 mph.

Tonight

A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Southeast wind around 7 mph.

Friday

Mostly sunny and hot, with a high near 98. Heat index values as high as 110. Light and variable wind becoming south around 6 mph in the morning.

Friday Night

Mostly clear, with a low around 77. South wind around 6 mph.

Saturday

Sunny and hot, with a high near 100. Southwest wind around 6 mph.

Saturday Night

Mostly clear, with a low around 78.

Sunday

Sunny and hot, with a high near 98.