Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Overcast

52°F

11°C

Humidity 94%
Wind Speed NW 16 G 24 mph
Barometer 30.06 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 19 May 10:55 am CDT
Extended Forecast for

Hartwick IA

  • Today

    Today: Mostly cloudy, with a high near 62. Breezy, with a northwest wind 14 to 17 mph, with gusts as high as 24 mph.

    High: 62 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 42. North northwest wind 6 to 11 mph.

    Low: 42 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Increasing clouds, with a high near 63. Northeast wind 6 to 8 mph.

    High: 63 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43. East northeast wind 5 to 7 mph.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm.  Mostly cloudy, with a high near 63. East wind around 10 mph, with gusts as high as 18 mph.

    High: 63 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am.  Cloudy, with a low around 45. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am.  Mostly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 62. Breezy, with a northwest wind 14 to 17 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 42. North northwest wind 6 to 11 mph.
Wednesday
Increasing clouds, with a high near 63. Northeast wind 6 to 8 mph.
Wednesday Night
Mostly cloudy, with a low around 43. East northeast wind 5 to 7 mph.
Thursday
A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 63. East wind around 10 mph, with gusts as high as 18 mph.
Thursday Night
A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 45. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 57.
Memorial Day
Mostly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Hartwick IA
 41.79°N 92.34°W
9:47 am CDT May 19, 2026
11am CDT May 19, 2026-6pm CDT May 25, 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