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.

Overcast

81°F

27°C

Humidity	81%
Wind Speed	S 7 mph
Barometer	29.94 in
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	87°F (31°C)
Last update	14 Aug 5:15 am CDT

More Information:

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

Extended Forecast for

Donnellson IL

Heat Advisory August 14, 05:32am until August 15, 09:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 14, 05:32am until August 15, 09:00pm
NOW until 9:00pm Sat
Heat Advisory
Overnight
Low: 73 °F
Slight Chance
T-storms
Friday
High: 92 °F
Chance
T-storms then
Mostly Sunny
Friday Night
Low: 74 °F
Mostly Clear
Saturday
High: 93 °F
Mostly Sunny
Saturday Night
Low: 74 °F
Partly Cloudy
Sunday
High: 92 °F
Mostly Sunny
Sunday Night
Low: 70 °F
Chance
T-storms
Monday
High: 84 °F
Mostly Sunny

Detailed Forecast

Overnight

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light southeast wind.

Friday

A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 109. Light and variable wind.

Friday Night

Mostly clear, with a low around 74. Calm wind becoming southeast around 5 mph after midnight.

Saturday

Mostly sunny, with a high near 93. Heat index values as high as 109. Light and variable wind becoming southwest around 5 mph in the morning.

Saturday Night

Partly cloudy, with a low around 74. Light southwest wind.

Sunday

Mostly sunny, with a high near 92.

Sunday Night

A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 70.

Monday

Mostly sunny, with a high near 84.