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

85°F

29°C

Humidity	70%
Wind Speed	Vrbl 3 mph
Barometer	29.89 in (1011.6 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	14 Aug 12:53 am CDT

More Information:

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

Extended Forecast for

Lemay MO

Extreme Heat Warning August 14, 01:52am until August 15, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 14, 01:52am until August 15, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Overnight
Low: 77 °F
Partly Cloudy
Friday
High: 98 °F
Chance
T-storms then
Sunny
Friday Night
Low: 78 °F
Mostly Clear
Saturday
High: 99 °F
Hot
Saturday Night
Low: 78 °F
Partly Cloudy
Sunday
High: 98 °F
Hot
Sunday Night
Low: 74 °F
Chance
T-storms then
Chance
Showers
Monday
High: 87 °F
Mostly Sunny

Detailed Forecast

Overnight

Partly cloudy, with a low around 77. Southwest wind around 6 mph.

Friday

A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly sunny and hot, with a high near 98. Heat index values as high as 111. Calm wind becoming south around 5 mph.

Friday Night

Mostly clear, with a low around 78. Light and variable wind becoming southeast around 5 mph.

Saturday

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

Saturday Night

Partly cloudy, with a low around 78. Calm wind becoming southwest around 5 mph after midnight.

Sunday

Mostly sunny and hot, with a high near 98.

Sunday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.

Monday

Mostly sunny, with a high near 87.