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

Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

83°F

28°C

Humidity 39%
Wind Speed S 13 mph
Barometer 29.91 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 11 Oct 12:35 pm CDT
Extended Forecast for

Hartwick IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. South wind around 10 mph, with gusts as high as 18 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 67. South wind around 9 mph.

    Low: 67 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Sunny, with a high near 87. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 64. South southwest wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 23 mph.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. North northwest wind 5 to 7 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers. Partly cloudy, with a low around 57. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers. Partly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 87. South wind around 10 mph, with gusts as high as 18 mph.
Tonight
Increasing clouds, with a low around 67. South wind around 9 mph.
Columbus Day
Sunny, with a high near 87. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Monday Night
Clear, with a low around 64. South southwest wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 23 mph.
Tuesday
Sunny, with a high near 77. North northwest wind 5 to 7 mph.
Tuesday Night
A 50 percent chance of showers. Partly cloudy, with a low around 57. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 70.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 53.
Thursday
Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 47.
Friday
Partly sunny, with a high near 58. Breezy.
Friday Night
Partly cloudy, with a low around 37.
Saturday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hartwick IA
 41.79°N 92.34°W
Last Update:
12:26 pm CDT Oct 11, 2026
Forecast Valid:
12pm CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation