Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Heat Advisory until September 19, 08:00 PM CDT

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

77°F

25°C

Humidity	94%
Wind Speed	SE 3 mph
Barometer	30.20 in (1022.2 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	16 Sep 7:53 pm CDT

More Information:

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

Extended Forecast for

Lemay MO

Heat Advisory September 16, 08:43pm until September 19, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 16, 08:43pm until September 19, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Tonight
Low: 76 °F
Chance
T-storms then
Partly Cloudy
Thursday
High: 99 °F
Hot
Thursday Night
Low: 74 °F
Mostly Clear
Friday
High: 97 °F
Hot
Friday Night
Low: 75 °F
Mostly Clear
Saturday
High: 98 °F
Hot
Saturday Night
Low: 73 °F
Partly Cloudy
then Chance
Showers
Sunday
High: 94 °F
Slight Chance
Showers then
Slight Chance
T-storms

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 9pm. Cloudy during the early evening, then gradual clearing, with a low around 76. Light south wind.

Thursday

Sunny and hot, with a high near 99. Heat index values as high as 109. West wind 3 to 6 mph.

Thursday Night

Mostly clear, with a low around 74. South wind around 5 mph becoming calm in the evening.

Friday

Sunny and hot, with a high near 97. Heat index values as high as 105. Light and variable wind.

Friday Night

Mostly clear, with a low around 75. Calm wind becoming south around 5 mph after midnight.

Saturday

Mostly sunny and hot, with a high near 98.

Saturday Night

A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.