Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

78°F

26°C

Humidity	82%
Wind Speed	N 5 mph
Barometer	30.17 in (1020.3 mb)
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	80°F (27°C)
Last update	18 Sep 7:51 am CDT

More Information:

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

Extended Forecast for

University City MO

Heat Advisory September 18, 08:48am until September 19, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 18, 08:48am until September 19, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Today
High: 96 °F
Sunny then
Slight Chance
T-storms
Tonight
Low: 74 °F
Slight Chance
T-storms then
Partly Cloudy
Saturday
High: 96 °F
Increasing
Clouds
Saturday Night
Low: 75 °F
Partly Cloudy
Sunday
High: 93 °F
Slight Chance
Showers then
Slight Chance
T-storms
Sunday Night
Low: 69 °F
Chance
T-storms then
Showers
Likely
Monday
High: 81 °F
Showers
Likely
Monday Night
Low: 61 °F
Chance
Showers

Detailed Forecast

Today

A slight chance of showers between 2pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 96. Heat index values as high as 107. Light and variable wind. Chance of precipitation is 20%.

Tonight

A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 74. East wind 5 to 7 mph becoming south after midnight.

Saturday

Increasing clouds, with a high near 96. Heat index values as high as 101. South wind 5 to 7 mph becoming west in the afternoon.

Saturday Night

Partly cloudy, with a low around 75. Calm wind becoming south around 5 mph after midnight.

Sunday

A slight chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 93. West wind 3 to 6 mph. Chance of precipitation is 20%.

Sunday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

Monday

Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.

Monday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

Tuesday

Partly sunny, with a high near 73.

Tuesday Night

Mostly cloudy, with a low around 57.

Wednesday

Mostly sunny, with a high near 74.

Wednesday Night

Partly cloudy, with a low around 57.