Severe Weather and Heavy Rainfall in the Ohio Valley; Heat Continuing in the South and Southeast

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians tonight. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 12, 08:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

82°F

28°C

Humidity	79%
Wind Speed	S 6 mph
Barometer	29.91 in
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	11 Aug 10:15 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 11, 10:32pm until August 12, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 11, 10:32pm until August 12, 08:00pm
NOW until 8:00pm Wed
Extreme Heat Warning
Tonight
Low: 78 °F
Partly Cloudy
Wednesday
High: 96 °F
Scattered
T-storms
Wednesday Night
Low: 76 °F
Scattered
T-storms
Thursday
High: 94 °F
Scattered
T-storms
Thursday Night
Low: 75 °F
Partly Cloudy
Friday
High: 93 °F
Mostly Sunny
Friday Night
Low: 74 °F
Partly Cloudy
Saturday
High: 96 °F
Mostly Sunny

Detailed Forecast

Tonight

Partly cloudy, with a low around 78. South wind around 6 mph.

Wednesday

Scattered showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 96. Heat index values as high as 110. South wind 5 to 8 mph becoming west in the morning. Chance of precipitation is 30%.

Wednesday Night

Scattered showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 76. South wind around 6 mph. Chance of precipitation is 30%.

Thursday

Scattered showers and thunderstorms, mainly before 7am. Mostly sunny, with a high near 94. Heat index values as high as 107. Light and variable wind becoming southwest around 6 mph in the morning. Chance of precipitation is 30%.

Thursday Night

Partly cloudy, with a low around 75. South wind around 6 mph.

Friday

Mostly sunny, with a high near 93.

Friday Night

Partly cloudy, with a low around 74.

Saturday

Mostly sunny, with a high near 96.

Saturday Night

Mostly clear, with a low around 76.

Sunday

Sunny, with a high near 96.