Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 15, 09:00 PM CDT

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

A Few Clouds

75°F

24°C

Humidity	94%
Wind Speed	Calm
Barometer	29.84 in (1009.9 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Last update	12 Aug 11:53 pm CDT

More Information:

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

Extended Forecast for

2 Miles NNE Arnold MO

Extreme Heat Warning August 13, 12:21am until August 15, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 13, 12:21am until August 15, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Overnight
Low: 75 °F
Scattered
T-storms
Thursday
High: 96 °F
Scattered
T-storms
Thursday Night
Low: 78 °F
Isolated
T-storms then
Mostly Clear
Friday
High: 99 °F
Hot
Friday Night
Low: 77 °F
Mostly Clear
Saturday
High: 99 °F
Hot
Saturday Night
Low: 77 °F
Mostly Clear
Sunday
High: 99 °F
Hot

Detailed Forecast

Overnight

Scattered showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 75. South wind 3 to 5 mph. Chance of precipitation is 30%.

Thursday

Scattered showers and thunderstorms before 10am, 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 southwest around 5 mph in the afternoon. Chance of precipitation is 30%.

Thursday Night

Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 78. Southeast wind around 5 mph becoming south after midnight. Chance of precipitation is 20%.

Friday

Partly sunny through mid morning, then becoming sunny and hot, with a high near 99. Heat index values as high as 110. Southwest wind 3 to 5 mph.

Friday Night

Mostly clear, with a low around 77. South wind 3 to 5 mph.

Saturday

Sunny and hot, with a high near 99.

Saturday Night

Mostly clear, with a low around 77.

Sunday

Sunny and hot, with a high near 99.

Sunday Night

A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74.