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

Heat Advisory until August 15, 09:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Partly Cloudy

74°F

23°C

Humidity	96%
Wind Speed	Calm
Barometer	29.87 in
Dewpoint	73°F (23°C)
Visibility	7.00 mi
Last update	13 Aug 1:15 am CDT

More Information:

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

Extended Forecast for

Carlinville IL

Heat Advisory August 13, 01:33am until August 15, 09:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 13, 01:33am until August 15, 09:00pm
NOW until 9:00pm Sat
Heat Advisory
Overnight
Low: 71 °F
Chance
Showers
Thursday
High: 91 °F
Chance
T-storms
Thursday Night
Low: 72 °F
Slight Chance
T-storms
Friday
High: 93 °F
Becoming
Sunny
Friday Night
Low: 73 °F
Mostly Clear
Saturday
High: 94 °F
Sunny
Saturday Night
Low: 74 °F
Mostly Clear
Sunday
High: 93 °F
Mostly Sunny

Detailed Forecast

Overnight

A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 71. Calm wind.

Thursday

A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. Heat index values as high as 106. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30%.

Thursday Night

A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 72. East wind 5 to 7 mph. Chance of precipitation is 20%.

Friday

Mostly cloudy through mid morning, then gradual clearing, with a high near 93. Heat index values as high as 109. Light and variable wind becoming southeast around 5 mph.

Friday Night

Mostly clear, with a low around 73. East wind 3 to 5 mph.

Saturday

Sunny, with a high near 94.

Saturday Night

Mostly clear, with a low around 74.

Sunday

Mostly sunny, with a high near 93.

Sunday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.

Monday

A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 20%.