Severe Thunderstorms and Heavy Rain in the Mid-Atlantic; Heat Persists Across the South

Scattered severe thunderstorms and excessive rainfall are possible into the night in the Mid Atlantic, and heavy rain will shift to Virginia and the Carolinas on Friday. Severe thunderstorms are also possible in the Central Plains into the Upper MS Valley and the Deep South tonight. Dangerous heat persists across the Southern Plains and Lower MS Valley and heat will expand into the Southwest. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Mostly Cloudy

68°F

20°C

Humidity 89%
Wind Speed S 5 mph
Barometer 30.08 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 21 Aug 1:55 am CDT
Extended Forecast for

Malcom IA

  • Overnight

    Overnight: Partly cloudy, with a low around 64. South wind around 6 mph.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 8am.  Sunny, with a high near 86. South southwest wind 6 to 10 mph becoming west northwest in the afternoon.

    High: 86 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. North northwest wind 3 to 6 mph.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82. Light northwest wind becoming north northwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am.  Mostly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly after 1pm.  Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 64. South wind around 6 mph.
Friday
A 20 percent chance of showers and thunderstorms before 8am. Sunny, with a high near 86. South southwest wind 6 to 10 mph becoming west northwest in the afternoon.
Friday Night
Mostly clear, with a low around 62. North northwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 82. Light northwest wind becoming north northwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Saturday Night
Mostly clear, with a low around 57. North wind 5 to 7 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 58.
Monday
A 30 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Malcom IA
 41.7°N 92.54°W
1:26 am CDT Aug 21, 2026
2am CDT Aug 21, 2026-6pm CDT Aug 27, 2026
 
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Additional Resources

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