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.

74°F

23°C

Humidity	97%
Wind Speed	NA
Barometer	29.84 in (1010.1 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Last update	13 Aug 12:53 am CDT

More Information:

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

Extended Forecast for

Mascoutah IL

Extreme Heat Warning August 13, 01:32am until August 15, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 13, 01:32am until August 15, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Overnight
Low: 73 °F
Chance
Showers
Thursday
High: 96 °F
Chance
Showers then
Slight Chance
T-storms
Thursday Night
Low: 77 °F
Slight Chance
T-storms then
Partly Cloudy
Friday
High: 98 °F
Hot
Friday Night
Low: 77 °F
Mostly Clear
Saturday
High: 99 °F
Hot
Saturday Night
Low: 78 °F
Mostly Clear
Sunday
High: 98 °F
Hot

Detailed Forecast

Overnight

A slight chance of showers and thunderstorms, then a chance of showers after 4am. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 30%.

Thursday

A chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 96. Heat index values as high as 117. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.

Thursday Night

A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Southeast wind 5 to 7 mph.

Friday

Mostly sunny and hot, with a high near 98. Heat index values as high as 116. Calm wind becoming south around 5 mph in the morning.

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 78.

Sunday

Sunny and hot, with a high near 98.