Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 12, 08:00 PM CDT

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

75°F

24°C

Humidity	94%
Wind Speed	S 6 mph
Barometer	29.97 in (1014.2 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Last update	10 Aug 4:53 am CDT

More Information:

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

Extended Forecast for

Cahokia IL

Extreme Heat Warning August 10, 05:08am until August 12, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 10, 05:08am until August 12, 08:00pm
NOW until 8:00pm Wed
Extreme Heat Warning
Today
High: 97 °F
Hot
Tonight
Low: 77 °F
Partly Cloudy
Tuesday
High: 99 °F
Hot
Tuesday Night
Low: 77 °F
Mostly Clear
then Slight
Chance
Showers
Wednesday
High: 96 °F
Slight Chance
Showers
Wednesday Night
Low: 75 °F
Chance
Showers then
Chance
T-storms
Thursday
High: 92 °F
Slight Chance
T-storms
Thursday Night
Low: 73 °F
Chance
T-storms

Detailed Forecast

Today

Increasing clouds and hot, with a high near 97. Heat index values as high as 107. South wind 7 to 9 mph becoming southwest in the morning.

Tonight

Partly cloudy, with a low around 77. South wind around 8 mph.

Tuesday

Sunny and hot, with a high near 99. Heat index values as high as 109. Southwest wind 7 to 9 mph.

Tuesday Night

A 20 percent chance of showers after 1am. Partly cloudy, with a low around 77. South wind around 7 mph.

Wednesday

A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 96. Southwest wind around 8 mph.

Wednesday Night

A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. Chance of precipitation is 40%.

Thursday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 92.

Thursday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.

Friday

A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90. Chance of precipitation is 30%.

Friday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

Saturday

A 20 percent chance of showers. Mostly sunny, with a high near 93.

Saturday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.