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

Heat Advisory until August 15, 09:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

93°F

34°C

Humidity	53%
Wind Speed	S 6 mph
Barometer	29.91 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	103°F (39°C)
Last update	13 Aug 1:55 pm CDT

More Information:

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

Extended Forecast for

5 Miles SSE Donnellson IL

Heat Advisory August 13, 02:52pm until August 15, 09:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 13, 02:52pm until August 15, 09:00pm
NOW until 9:00pm Sat
Heat Advisory
This Afternoon
High: 91 °F
Partly Sunny
Tonight
Low: 73 °F
Partly Cloudy
Friday
High: 94 °F
Slight Chance
T-storms then
Sunny
Friday Night
Low: 74 °F
Mostly Clear
Saturday
High: 95 °F
Sunny
Saturday Night
Low: 73 °F
Mostly Clear
Sunday
High: 93 °F
Mostly Sunny
Sunday Night
Low: 70 °F
Chance
T-storms

Detailed Forecast

This Afternoon

Partly sunny, with a high near 91. Heat index values as high as 108. South wind 3 to 5 mph.

Tonight

Partly cloudy, with a low around 73. South wind around 6 mph.

Friday

A 20 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 94. Heat index values as high as 110. Light and variable wind becoming south around 5 mph in the morning.

Friday Night

Mostly clear, with a low around 74. Southeast wind 3 to 5 mph.

Saturday

Sunny, with a high near 95. Southwest wind 3 to 6 mph.

Saturday Night

Mostly clear, with a low around 73.

Sunday

Mostly sunny, with a high near 93.

Sunday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 50%.

Monday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.