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 in effect from September 15, 11:00 AM CDT until September 15, 07:00 PM CDT

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

90°F

32°C

Humidity	54%
Wind Speed	S 9 mph
Barometer	30.08 in (1017.2 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	96°F (36°C)
Last update	15 Sep 10:51 am CDT

More Information:

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

Extended Forecast for

Saint Louis MO

Heat Advisory until September 15, 07:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until September 15, 07:00pm
NOW until 7:00pm Tue
Heat Advisory
Today
High: 100 °F
Isolated
T-storms
Tonight
Low: 75 °F
T-storms
Likely
Wednesday
High: 97 °F
Slight Chance
T-storms then
Partly Sunny
Wednesday Night
Low: 77 °F
Decreasing
Clouds
Thursday
High: 98 °F
Hot
Thursday Night
Low: 75 °F
Mostly Clear
Friday
High: 95 °F
Sunny
Friday Night
Low: 74 °F
Mostly Clear

Detailed Forecast

Today

Isolated showers and thunderstorms after 4pm. Sunny and hot, with a high near 100. Heat index values as high as 107. Southwest wind 7 to 9 mph. Chance of precipitation is 20%.

Tonight

Showers and thunderstorms likely, mainly between 7pm and 8pm. Mostly cloudy, with a low around 75. Southeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 60%.

Wednesday

A 20 percent chance of showers and thunderstorms before 10am. Partly sunny and hot, with a high near 97. Heat index values as high as 106. Light and variable wind becoming south around 6 mph in the afternoon.

Wednesday Night

Mostly cloudy, then gradually becoming mostly clear, with a low around 77. South wind 3 to 5 mph.

Thursday

Sunny and hot, with a high near 98. Light and variable wind becoming west around 5 mph.

Thursday Night

Mostly clear, with a low around 75.

Friday

Sunny, with a high near 95.

Friday Night

Mostly clear, with a low around 74.

Saturday

Mostly sunny, with a high near 95.