Heat and Fire Weather Concerns West; Heavy Rain and Thunderstorms from Plains to mid-Atlantic

Thunderstorms and locally heavy rainfall is expected from the Central Plains to the Ohio Valley, mid-Atlantic and across the Southeast. Severe weather from the Upper Midwest to Central Plains increases on Friday. Major to Extreme HeatRisk continues across the Southern Plains to the lower Mississippi Valley late this week. Fire weather concerns for the northern Rockies and northern Plains today. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Overcast

77°F

25°C

Humidity 77%
Wind Speed Calm
Barometer 30.04 in (1016.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 10 Sep 12:51 pm CDT
Extended Forecast for

2 Miles SSW West Alton MO

  • This Afternoon

    This Afternoon: A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms between 3pm and 4pm.  Mostly cloudy, with a high near 79. Calm wind becoming north around 5 mph.  Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 67. Light and variable wind.

    Low: 67 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: A 20 percent chance of showers after 10am.  Patchy fog before 8am.  Otherwise, increasing clouds, with a high near 83. Calm wind becoming southeast around 6 mph in the morning.

    High: 83 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 68. South wind around 5 mph becoming calm  in the evening.

    Low: 68 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 90. Light and variable wind becoming west around 6 mph in the morning.

    High: 90 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 1pm.  Mostly sunny, with a high near 89. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms between 3pm and 4pm. Mostly cloudy, with a high near 79. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.
Tonight
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 67. Light and variable wind.
Friday
A 20 percent chance of showers after 10am. Patchy fog before 8am. Otherwise, increasing clouds, with a high near 83. Calm wind becoming southeast around 6 mph in the morning.
Friday Night
Mostly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 90. Light and variable wind becoming west around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 70.
Monday
Sunny, with a high near 93.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 71.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Tuesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 64.
Wednesday
A 40 percent chance of showers. Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW West Alton MO
 38.84°N 90.25°W (Elev. 499 ft)
1:01 pm CDT Sep 10, 2026
1pm CDT Sep 10, 2026-6pm CDT Sep 16, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database