Dangerous Heat and Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of east Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Friday could bring areas of flooding across parts of the central Plains into the upper Midwest and Four Corners states. Read More >

Hazardous Weather Conditions

Heat Advisory until September 18, 08:00 PM CDT

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

96°F

36°C

Humidity	39%
Wind Speed	SW 8 mph
Barometer	30.04 in (1015.7 mb)
Dewpoint	67°F (19°C)
Visibility	10.00 mi
Heat Index	100°F (38°C)
Last update	15 Sep 5:51 pm CDT

More Information:

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

Extended Forecast for

Saint Louis MO

Heat Advisory September 15, 06:36pm until September 18, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 15, 06:36pm until September 18, 08:00pm
NOW until 8:00pm Fri
Heat Advisory
Tonight
Low: 76 °F
Chance
T-storms
Wednesday
High: 94 °F
Chance
Showers then
Slight Chance
T-storms
Wednesday Night
Low: 78 °F
Slight Chance
Showers then
Mostly Clear
Thursday
High: 98 °F
Hot
Thursday Night
Low: 75 °F
Partly Cloudy
Friday
High: 97 °F
Hot
Friday Night
Low: 75 °F
Mostly Clear
Saturday
High: 98 °F
Hot

Detailed Forecast

Tonight

A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Southeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 30%.

Wednesday

A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 102. Calm wind becoming south around 5 mph. Chance of precipitation is 30%.

Wednesday Night

A 20 percent chance of showers before 8pm. Partly cloudy, with a low around 78. Light south wind.

Thursday

Sunny and hot, with a high near 98. Heat index values as high as 105. Light and variable wind becoming southwest around 5 mph.

Thursday Night

Partly cloudy, with a low around 75. Calm wind.

Friday

Sunny and hot, with a high near 97.

Friday Night

Mostly clear, with a low around 75.

Saturday

Mostly sunny and hot, with a high near 98.