Dangerous heat and humidity from the central U.S. to East Coast this weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central and eastern U.S. Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest, Ohio Valley, Mid-Atlantic and southern states. Be very cautious if you must do outdoor activities in these areas during the afternoon and evening this weekend. Read More >

Current conditions at

St. Louis, Lambert-St. Louis International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

87°F

31°C

Humidity 59%
Wind Speed S 5 mph
Barometer 30.01 in (1014.6 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 23 Jul 9:51 am CDT
Extended Forecast for

Saint Louis MO

Excessive Heat Warning until July 24, 08:00pm
Click here for hazard details and duration
Excessive Heat Warning
  •  
    Excessive Heat Warning until July 24, 08:00pm

    NOW until
    8:00pm Sun

    Excessive Heat Warning

  • Today

    Today: Isolated showers and thunderstorms after 1pm.  Mostly sunny, with a high near 96. Heat index values as high as 106. East wind 5 to 7 mph.  Chance of precipitation is 20%.

    Mostly Sunny
    then Isolated
    T-storms

    High: 96 °F

  • Tonight

    Tonight: Mostly clear, with a low around 78. Southeast wind 5 to 8 mph.

    Mostly Clear

    Low: 78 °F

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms.  Mostly sunny and hot, with a high near 97. Heat index values as high as 110. South wind 5 to 7 mph.

    Chance
    T-storms

    High: 97 °F

  • Sunday
    Night

    Sunday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 76. South wind 5 to 7 mph becoming calm  after midnight.

    Chance
    T-storms

    Low: 76 °F

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 90. Calm wind becoming northeast 5 to 7 mph in the afternoon.

    Chance
    T-storms

    High: 90 °F

  • Monday
    Night

    Monday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 73.

    Slight Chance
    T-storms

    Low: 73 °F

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 90.

    Slight Chance
    T-storms

    High: 90 °F

  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 73.

    Slight Chance
    T-storms

    Low: 73 °F

Detailed Forecast

Today
Isolated showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Heat index values as high as 106. East wind 5 to 7 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 78. Southeast wind 5 to 8 mph.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97. Heat index values as high as 110. South wind 5 to 7 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 76. South wind 5 to 7 mph becoming calm after midnight.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Click Map For Forecast
Point Forecast:
Saint Louis MO
 38.64°N 90.23°W (Elev. 538 ft)
9:00 am CDT Jul 23, 2016
10am CDT Jul 23, 2016-6pm CDT Jul 29, 2016
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database