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Severe Thunderstorms With Heavy Rain Possible In The Upper Midwest; Excessive Heat For Central U.S.

Several rounds of strong to severe thunderstorms will be possible from the northern Plains and upper Midwest to the Great Lakes through Friday. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat will grip the central Plains with heat indices approaching 105 to 110 degrees. Very hot and humid conditions are likely to expand into the Mid Atlantic. Read More >

Current conditions at

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

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

101°F

38°C

Humidity 36%
Wind Speed W 9 G 16 mph
Barometer 29.97 in (1012.9 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index108°F (42°C)
Last update 21 Jul 1:51 pm CDT
Extended Forecast for

Saint Louis MO

Excessive Heat Warning until July 22, 08:00pm
Click here for hazard details and duration
Excessive Heat Warning
  •  
    Excessive Heat Warning until July 22, 08:00pm

    NOW until
    8:00pm Sat

    Excessive Heat Warning

  • This
    Afternoon

    This Afternoon: Sunny and hot, with a high near 104. Heat index values as high as 114. Southwest wind around 7 mph.

    Hot

    High: 104 °F

  • Tonight

    Tonight: Mostly clear, with a low around 82. South wind 6 to 8 mph.

    Mostly Clear

    Low: 82 °F

  • Saturday

    Saturday: Sunny and hot, with a high near 105. Heat index values as high as 113. Southwest wind 7 to 11 mph.

    Hot

    High: 105 °F

  • Saturday
    Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 8pm.  Partly cloudy, with a low around 79. Southwest wind 5 to 10 mph becoming light west  after midnight.

    Chance
    T-storms

    Low: 79 °F

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before 8am.  Partly sunny, with a high near 96. Northwest wind 3 to 5 mph.

    Chance
    T-storms

    High: 96 °F

  • Sunday
    Night

    Sunday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am.  Partly cloudy, with a low around 75. Chance of precipitation is 20%.

    Slight Chance
    T-storms

    Low: 75 °F

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 8am.  Mostly sunny, with a high near 90.

    Slight Chance
    T-storms then
    Mostly Sunny

    High: 90 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 70.

    Mostly Clear

    Low: 70 °F

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 104. Heat index values as high as 114. Southwest wind around 7 mph.
Tonight
Mostly clear, with a low around 82. South wind 6 to 8 mph.
Saturday
Sunny and hot, with a high near 105. Heat index values as high as 113. Southwest wind 7 to 11 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 79. Southwest wind 5 to 10 mph becoming light west after midnight.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 8am. Partly sunny, with a high near 96. Northwest wind 3 to 5 mph.
Sunday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 75. Chance of precipitation is 20%.
Monday
A 20 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny, with a high near 89.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 72.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
Mostly sunny, with a high near 94.
Click Map For Forecast
Point Forecast:
Saint Louis MO
 38.64°N 90.23°W (Elev. 538 ft)
12:57 pm CDT Jul 21, 2017
2pm CDT Jul 21, 2017-6pm CDT Jul 27, 2017
 
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