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

88°F

31°C

Humidity	66%
Wind Speed	SW 8 mph
Barometer	29.87 in (1010.2 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	98°F (37°C)
Last update	12 Aug 10:54 am CDT

More Information:

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

Extended Forecast for

3 Miles SSE Saint Peters MO

Extreme Heat Warning August 12, 11:55am until August 13, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 12, 11:55am until August 13, 08:00pm
NOW until 8:00pm Thu
Extreme Heat Warning
Today
High: 93 °F
Isolated
T-storms
Tonight
Low: 77 °F
Scattered
T-storms
Thursday
High: 96 °F
Scattered
T-storms
Thursday Night
Low: 77 °F
Isolated
T-storms then
Mostly Clear
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

Isolated showers and thunderstorms after noon. Partly sunny, with a high near 93. Heat index values as high as 103. Southwest wind 5 to 7 mph. Chance of precipitation is 20%.

Tonight

Scattered showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 77. Light and variable wind becoming south around 6 mph in the evening. Chance of precipitation is 30%.

Thursday

Scattered showers and thunderstorms before 11am, then isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 96. Heat index values as high as 109. Light and variable wind becoming west around 6 mph in the morning. Chance of precipitation is 30%.

Thursday Night

Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 77. Southeast wind around 6 mph. Chance of precipitation is 20%.

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.