Heavy Rainfall and Severe Thunderstorms in the Midwest and Ohio Valley Tuesday

Multiple rounds of severe thunderstorms appear likely Tuesday across the Midwest and Ohio Valley, with severe wind gusts in excess of 75 mph as the primary threat. Heavy to excessive rainfall may lead to considerable flash and urban flooding impacts Tuesday across portions of the Ohio Valley. A Moderate Risk (level 3 of 4) of excessive rainfall has been issued. Read More >

Hazardous Weather Conditions

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

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Partly Cloudy

81°F

27°C

Humidity	77%
Wind Speed	SW 6 mph
Barometer	29.97 in (1013.3 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	11 Aug 3:51 am CDT

More Information:

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

Extended Forecast for

3 Miles NNW Black Jack MO

Extreme Heat Warning August 11, 04:03am until August 12, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 11, 04:03am until August 12, 08:00pm
NOW until 8:00pm Wed
Extreme Heat Warning
Today
High: 97 °F
Hot
Tonight
Low: 78 °F
Partly Cloudy
Wednesday
High: 97 °F
Sunny then
Slight Chance
T-storms
Wednesday Night
Low: 77 °F
Mostly Clear
then Chance
T-storms
Thursday
High: 94 °F
Chance
T-storms
Thursday Night
Low: 75 °F
Slight Chance
T-storms then
Chance
T-storms
Friday
High: 92 °F
Slight Chance
T-storms
Friday Night
Low: 75 °F
Partly Cloudy

Detailed Forecast

Today

Mostly sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 8 to 11 mph.

Tonight

Partly cloudy, with a low around 78. Southwest wind around 7 mph.

Wednesday

A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind 6 to 8 mph.

Wednesday Night

A 40 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 77. South wind around 6 mph becoming east after midnight.

Thursday

A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 94. East wind around 7 mph.

Thursday Night

A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 75.

Friday

A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 92.

Friday Night

Partly cloudy, with a low around 75.

Saturday

Mostly sunny and hot, with a high near 97.

Saturday Night

Mostly clear, with a low around 78.