Severe Weather and Heavy Rainfall from the High Plains to the Ohio Valley; Heat Continuing in the Central Plains and Southeast

A stationary front will be the focus for daily showers and thunderstorms capable of widely scattered flash flooding and severe weather from the High Plains to the Ohio Valley. Monsoonal thunderstorms could cause local flash flooding across the Southwest and the Great Basin. Dangerous heat continues across the Central Plains and Southeast. Many areas will see their hottest temperatures of the year. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 13, 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	77%
Wind Speed	W 8 mph
Barometer	29.86 in (1010.1 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	12 Aug 5:54 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 12, 06:31am until August 13, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 12, 06:31am until August 13, 08:00pm
NOW until 8:00pm Thu
Extreme Heat Warning
Today
High: 94 °F
Mostly Sunny
then Slight
Chance
T-storms
Tonight
Low: 76 °F
Partly Cloudy
then Chance
T-storms
Thursday
High: 96 °F
Slight Chance
T-storms then
Mostly Sunny
Thursday Night
Low: 77 °F
Partly Cloudy
Friday
High: 97 °F
Hot
Friday Night
Low: 77 °F
Mostly Clear
Saturday
High: 98 °F
Hot
Saturday Night
Low: 77 °F
Mostly Clear

Detailed Forecast

Today

A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 94. Heat index values as high as 109. Southwest wind 5 to 7 mph.

Tonight

A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 76. Southeast wind 3 to 5 mph.

Thursday

A 20 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 96. Heat index values as high as 109. South wind around 6 mph.

Thursday Night

Partly cloudy, with a low around 77. South wind around 5 mph.

Friday

Mostly sunny and hot, with a high near 97. Southwest wind 3 to 5 mph.

Friday Night

Mostly clear, with a low around 77.

Saturday

Sunny and hot, with a high near 98.

Saturday Night

Mostly clear, with a low around 77.

Sunday

Sunny, with a high near 96.