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

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Overcast

33°F

1°C

Humidity 59%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 14 Mar 12:35 am CDT
Extended Forecast for

3 Miles NNW Hartwick IA

Winter Storm Watch March 15, 10:00am until March 16, 10:00am
Click here for hazard details and duration
Winter Storm Watch

  • Overnight

    Overnight: Mostly cloudy, with a low around 29. Calm wind becoming east northeast around 5 mph.

    Low: 29 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 46. Breezy, with a southeast wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 46 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: A 50 percent chance of rain after 1am. Mostly cloudy, with a low around 39. Breezy, with an east southeast wind 15 to 17 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: Rain before 4pm, then snow, possibly mixed with rain. Some thunder is also possible. Temperature rising to near 50 by 9am, then falling to around 37 during the remainder of the day. Windy, with a south wind 14 to 19 mph becoming north northwest 24 to 29 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 50 °F⇓

    Rain and
    Breezy then
    Rain/Snow and
    Windy

  • Sunday Night

    Sunday Night: Snow, possibly mixed with rain, becoming all snow after 7pm. Widespread blowing snow, mainly after 10pm. Low around 8. Windy, with a northwest wind 31 to 34 mph, with gusts as high as 49 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.

    Low: 8 °F

    Rain/Snow and
    Blowing Snow
    then Snow
    Likely and
    Blowing Snow

  • Monday

    Monday: A 20 percent chance of snow before 1pm. Areas of blowing snow before 8am. Partly sunny, with a high near 16. Windy.

    High: 16 °F

    Slight Chance
    Snow and
    Areas Blowing
    Snow

  • Monday Night

    Monday Night: Mostly clear, with a low around -1. Windy.

    Low: -1 °F

    Mostly Clear
    and Windy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow before 1am. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 29. Calm wind becoming east northeast around 5 mph.
Saturday
Mostly cloudy, with a high near 46. Breezy, with a southeast wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
A 50 percent chance of rain after 1am. Mostly cloudy, with a low around 39. Breezy, with an east southeast wind 15 to 17 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain before 4pm, then snow, possibly mixed with rain. Some thunder is also possible. Temperature rising to near 50 by 9am, then falling to around 37 during the remainder of the day. Windy, with a south wind 14 to 19 mph becoming north northwest 24 to 29 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow, possibly mixed with rain, becoming all snow after 7pm. Widespread blowing snow, mainly after 10pm. Low around 8. Windy, with a northwest wind 31 to 34 mph, with gusts as high as 49 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.
Monday
A 20 percent chance of snow before 1pm. Areas of blowing snow before 8am. Partly sunny, with a high near 16. Windy.
Monday Night
Mostly clear, with a low around -1. Windy.
Tuesday
Mostly sunny, with a high near 27.
Tuesday Night
A 50 percent chance of snow before 1am. Mostly cloudy, with a low around 19.
Wednesday
Sunny, with a high near 48.
Wednesday Night
Partly cloudy, with a low around 31.
Thursday
Sunny, with a high near 54.
Thursday Night
Partly cloudy, with a low around 33.
Friday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Hartwick IA
 41.81°N 92.37°W
Last Update:
10:57 pm CDT Mar 13, 2026
Forecast Valid:
12am CDT Mar 14, 2026-6pm CDT Mar 20, 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