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, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

79°F

26°C

Humidity	85%
Wind Speed	Calm
Barometer	29.97 in (1013.7 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	83°F (28°C)
Last update	11 Aug 1:54 am CDT

More Information:

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

Extended Forecast for

Weldon Spring MO

Extreme Heat Warning August 11, 02:33am until August 12, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 11, 02:33am until August 12, 08:00pm
NOW until 8:00pm Wed
Extreme Heat Warning
Overnight
Low: 78 °F
Mostly Clear
Tuesday
High: 97 °F
Hot
Tuesday Night
Low: 77 °F
Partly Cloudy
Wednesday
High: 96 °F
Sunny then
Slight Chance
T-storms
Wednesday Night
Low: 76 °F
Partly Cloudy
then Chance
Showers
Thursday
High: 94 °F
Slight Chance
T-storms then
Slight Chance
Showers
Thursday Night
Low: 74 °F
Chance
T-storms
Friday
High: 92 °F
Partly Sunny

Detailed Forecast

Overnight

Mostly clear, with a low around 78. South wind around 7 mph.

Tuesday

Mostly sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind 7 to 10 mph.

Tuesday Night

Partly cloudy, with a low around 77. Southwest wind around 6 mph.

Wednesday

A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 96. Heat index values as high as 109. Southwest wind 5 to 7 mph.

Wednesday Night

A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76. South wind 3 to 5 mph.

Thursday

A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 94. Chance of precipitation is 20%.

Thursday Night

A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 74.

Friday

Partly sunny, with a high near 92.

Friday Night

Partly cloudy, with a low around 75.

Saturday

Mostly sunny, with a high near 96.

Saturday Night

Mostly clear, with a low around 76.

Sunday

Sunny, with a high near 95.