National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

74°F

23°C

Humidity 94%
Wind Speed NW 5 mph
Barometer 29.91 in (1011.7 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 20 Aug 2:51 am CDT
Extended Forecast for

Spanish Lake MO

  • Overnight

    Overnight: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Thursday

    Thursday: Isolated showers after 4pm. Partly sunny, with a high near 83. North wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 83 °F

    Partly Sunny
    then Isolated
    Showers

  • Thursday Night

    Thursday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 64. Northeast wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 70. Light and variable wind.

    Low: 70 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 70. Calm wind.
Thursday
Isolated showers after 4pm. Partly sunny, with a high near 83. North wind 3 to 7 mph. Chance of precipitation is 20%.
Thursday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 64. Northeast wind around 6 mph becoming calm in the evening.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 70. Light and variable wind.
Saturday
Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 65.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Spanish Lake MO
 38.77°N 90.2°W (Elev. 499 ft)
Last Update:
3:26 am CDT Aug 20, 2026
Forecast Valid:
3am CDT Aug 20, 2026-6pm CDT Aug 26, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation