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 Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

82°F

28°C

Humidity	69%
Wind Speed	S 5 mph
Barometer	30.23 in (1022.2 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	16 Sep 10:51 pm CDT

More Information:

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

Extended Forecast for

Frontenac MO

Heat Advisory September 16, 11:44pm until September 19, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 16, 11:44pm until September 19, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Tonight
Low: 77 °F
Clear
Thursday
High: 98 °F
Hot
Thursday Night
Low: 75 °F
Chance
T-storms then
Mostly Clear
Friday
High: 96 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 76 °F
Mostly Clear
Saturday
High: 97 °F
Hot
Saturday Night
Low: 74 °F
Partly Cloudy
then Chance
Showers
Sunday
High: 93 °F
Slight Chance
Showers then
Slight Chance
T-storms

Detailed Forecast

Tonight

Mostly cloudy early, then becoming clear, with a low around 77. Light south wind.

Thursday

Sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind 3 to 7 mph.

Thursday Night

A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 75. South wind around 5 mph becoming calm in the evening.

Friday

A slight chance of showers and thunderstorms between 1pm and 2pm. Sunny, with a high near 96. Heat index values as high as 104. Light and variable wind becoming south around 5 mph. Chance of precipitation is 20%.

Friday Night

Mostly clear, with a low around 76. South wind 3 to 5 mph.

Saturday

Mostly sunny and hot, with a high near 97.

Saturday Night

A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.

Sunday

A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 20%.

Sunday Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 20%.

Monday

A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 30%.