Storms and Heavy Rainfall in the Plains and Southern Appalachians; Hazardous Heat in the South and Southeast

Severe thunderstorms with heavy rainfall will be possible across the southern Appalachians through this evening. Thunderstorms are also expected from the northern/central Plains into portions of the Midwest through Tuesday, and severe storms may produce large hail and damaging wind gusts. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Mostly Cloudy

82°F

28°C

Humidity 56%
Wind Speed N 5 mph
Barometer 30.01 in (1015.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 17 Aug 6:54 pm CDT
Extended Forecast for

4 Miles ENE New Melle MO

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 63. North wind around 5 mph becoming calm  in the evening.

    Low: 63 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Increasing clouds, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.

    High: 88 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am.  Increasing clouds, with a low around 69. Light and variable wind becoming east around 5 mph after midnight.

    Low: 69 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm.  Mostly cloudy, with a high near 84. South wind around 5 mph becoming calm  in the morning.

    High: 84 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly after 1am.  Mostly cloudy, with a low around 66. Light northeast wind.  Chance of precipitation is 60%.

    Low: 66 °F

    T-storms
    Likely

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 83.

    High: 83 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Friday Night

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

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Cloudy during the early evening, then gradual clearing, with a low around 63. North wind around 5 mph becoming calm in the evening.
Tuesday
Increasing clouds, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 69. Light and variable wind becoming east around 5 mph after midnight.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 84. South wind around 5 mph becoming calm in the morning.
Wednesday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 66. Light northeast wind. Chance of precipitation is 60%.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 66.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 63.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE New Melle MO
 38.72°N 90.82°W (Elev. 630 ft)
6:11 pm CDT Aug 17, 2026
7pm CDT Aug 17, 2026-6pm CDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database