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.

Fair

83°F

28°C

Humidity	79%
Wind Speed	S 6 mph
Barometer	29.89 in (1011.7 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	91°F (33°C)
Last update	13 Aug 11:53 pm CDT

More Information:

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

Extended Forecast for

Granite City IL

Extreme Heat Warning August 14, 12:12am until August 15, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 14, 12:12am until August 15, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Overnight
Low: 78 °F
Partly Cloudy
Friday
High: 99 °F
Hot
Friday Night
Low: 79 °F
Mostly Clear
Saturday
High: 99 °F
Hot
Saturday Night
Low: 78 °F
Mostly Clear
Sunday
High: 99 °F
Hot
Sunday Night
Low: 74 °F
Chance
T-storms
Monday
High: 89 °F
Partly Sunny
then Slight
Chance
T-storms

Detailed Forecast

Overnight

Partly cloudy, with a low around 78. Southwest wind 5 to 7 mph.

Friday

Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 114. Calm wind becoming south around 6 mph in the morning.

Friday Night

Mostly clear, with a low around 79. Southeast wind around 6 mph.

Saturday

Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 111. Light and variable wind becoming southwest 5 to 7 mph in the morning.

Saturday Night

Mostly clear, with a low around 78. Calm wind becoming southwest around 5 mph after midnight.

Sunday

Mostly sunny and hot, with a high near 99.

Sunday Night

A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 74. Chance of precipitation is 40%.

Monday

A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89.

Monday Night

Partly cloudy, with a low around 71.

Tuesday

Sunny, with a high near 91.

Tuesday Night

Mostly clear, with a low around 74.

Wednesday

Mostly sunny, with a high near 96.

Wednesday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.