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.

Partly Cloudy

67°F

19°C

Humidity 91%
Wind Speed S 6 mph
Barometer 30.06 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 21 Aug 2:15 am CDT
Extended Forecast for

Chelsea IA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 68. South wind around 6 mph.

    Low: 68 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 8am.  Sunny, with a high near 87. South wind 5 to 9 mph becoming west northwest in the afternoon.

    High: 87 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 61 °F

    Mostly Clear

  • Saturday

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

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers.  Partly sunny, with a high near 78.

    High: 78 °F

    Slight 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 steady temperature around 68. South wind around 6 mph.
Friday
A 20 percent chance of showers and thunderstorms before 8am. Sunny, with a high near 87. South wind 5 to 9 mph becoming west northwest in the afternoon.
Friday Night
Mostly clear, with a low around 61. Northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 82. Light northwest wind becoming north northwest 5 to 10 mph in the morning.
Saturday Night
Mostly clear, with a low around 56. North wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 57.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 83.
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 60.
Thursday
Sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Chelsea IA
 41.92°N 92.39°W
1:26 am CDT Aug 21, 2026
2am CDT Aug 21, 2026-6pm CDT Aug 27, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database