Heavy Rainfall and Severe Thunderstorms in the Midwest and Ohio Valley Tuesday

Multiple rounds of severe thunderstorms appear likely Tuesday across the Midwest and Ohio Valley, with severe wind gusts in excess of 75 mph as the primary threat. Heavy to excessive rainfall may lead to considerable flash and urban flooding impacts Tuesday across portions of the Ohio Valley. A Moderate Risk (level 3 of 4) of excessive rainfall has been issued. Read More >

Hazardous Weather Conditions

Heat Advisory until August 12, 08:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

80°F

27°C

Humidity	90%
Wind Speed	S 5 mph
Barometer	29.98 in
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	11 Aug 2:15 am CDT

More Information:

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

Extended Forecast for

Coffeen IL

Heat Advisory August 11, 02:35am until August 12, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 11, 02:35am until August 12, 08:00pm
NOW until 8:00pm Wed
Heat Advisory
Overnight
Low: 75 °F
Partly Cloudy
Tuesday
High: 93 °F
Mostly Sunny
Tuesday Night
Low: 73 °F
Chance
T-storms
Wednesday
High: 92 °F
Mostly Sunny
then Chance
T-storms
Wednesday Night
Low: 73 °F
Chance
T-storms
Thursday
High: 89 °F
Chance
T-storms then
Chance
Showers
Thursday Night
Low: 70 °F
Chance
T-storms then
Showers
Likely
Friday
High: 87 °F
Slight Chance
Showers

Detailed Forecast

Overnight

Partly cloudy, with a low around 75. South wind around 7 mph.

Tuesday

Mostly sunny, with a high near 93. Heat index values as high as 102. Southwest wind 7 to 9 mph.

Tuesday Night

A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, then gradually becoming clear, with a low around 73. Southwest wind 3 to 6 mph.

Wednesday

A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 92. Heat index values as high as 105. Southwest wind 3 to 6 mph.

Wednesday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Light and variable wind.

Thursday

A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 89.

Thursday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

Friday

A 20 percent chance of showers before 1pm. Partly sunny, with a high near 87.

Friday Night

Partly cloudy, with a low around 71.

Saturday

Mostly sunny, with a high near 92.

Saturday Night

Mostly clear, with a low around 73.

Sunday

Sunny, with a high near 92.

Sunday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.