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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

54°F

12°C

Humidity 87%
Wind Speed W 5 mph
Barometer 30.17 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 4 Oct 2:35 am CDT
Extended Forecast for

Chelsea IA

Flood Warning October 4, 10:00am until October 6, 03:00am
Click here for hazard details and duration
Flood Warning

  • Overnight

    Overnight: Mostly clear, with a low around 49. Light west northwest wind.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 70. North northwest wind 5 to 8 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 44. Light north northwest wind.

    Low: 44 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 69. Calm wind becoming south around 6 mph in the afternoon.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 49. South wind around 6 mph.

    Low: 49 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 49. Light west northwest wind.
Sunday
Sunny, with a high near 70. North northwest wind 5 to 8 mph.
Sunday Night
Clear, with a low around 44. Light north northwest wind.
Monday
Sunny, with a high near 69. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Clear, with a low around 49. South wind around 6 mph.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 70.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chelsea IA
 41.92°N 92.39°W
Last Update:
1:56 am CDT Oct 4, 2026
Forecast Valid:
2am CDT Oct 4, 2026-6pm CDT Oct 10, 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