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 Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Partly Cloudy

77°F

25°C

Humidity	94%
Wind Speed	Calm
Barometer	29.86 in
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	12 Aug 11:15 pm CDT

More Information:

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

Extended Forecast for

2 Miles WNW Saint Jacob IL

Extreme Heat Warning August 12, 11:22pm until August 15, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 12, 11:22pm until August 15, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Tonight
Low: 73 °F
Scattered
T-storms
Thursday
High: 95 °F
Scattered
T-storms
Thursday Night
Low: 77 °F
Isolated
T-storms then
Partly Cloudy
Friday
High: 96 °F
Decreasing
Clouds
Friday Night
Low: 76 °F
Mostly Clear
Saturday
High: 96 °F
Sunny
Saturday Night
Low: 76 °F
Mostly Clear
Sunday
High: 96 °F
Sunny

Detailed Forecast

Tonight

Scattered showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 73. East wind around 6 mph. Chance of precipitation is 30%.

Thursday

Scattered showers and thunderstorms before 11am, then isolated showers and thunderstorms after 3pm. Partly sunny, with a high near 95. Heat index values as high as 110. Light and variable wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 30%.

Thursday Night

Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 77. South wind 5 to 8 mph. Chance of precipitation is 20%.

Friday

Mostly cloudy, then gradually becoming sunny, with a high near 96. Heat index values as high as 110. Southwest wind 3 to 6 mph.

Friday Night

Mostly clear, with a low around 76. South wind 3 to 6 mph.

Saturday

Sunny, with a high near 96.

Saturday Night

Mostly clear, with a low around 76.

Sunday

Sunny, with a high near 96.