Isolated Severe Storms in the Midwest; Fire Weather Concerns in the Northern Plains; Record Heat in the West

Isolated severe storms are possible across parts of the Florida Peninsula and the Great Lakes to Lower Missouri Valley and south-central Plains late this afternoon and early evening. Elevated to critical fire weather concerns continue over much of the northern Great Plains. Above average temperatures persist across portions of the West today. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Partly Cloudy and Breezy

68°F

20°C

Humidity 41%
Wind Speed SW 24 G 29 mph
Barometer 30.00 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 12 May 8:15 am CDT
Extended Forecast for

Sully IA

  • Today

    Today: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and noon.  Partly sunny, with a high near 82. Windy, with a west wind 18 to 21 mph, with gusts as high as 30 mph.  Chance of precipitation is 20%.

    High: 82 °F

    Windy. Slight
    Chance
    T-storms then
    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Breezy, with a northwest wind 9 to 16 mph, with gusts as high as 26 mph.

    Low: 50 °F

    Mostly Clear
    and Breezy
    then Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73. North northwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 46. North wind around 6 mph becoming light and variable.

    Low: 46 °F

    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 77. Breezy, with a south southeast wind 7 to 17 mph, with gusts as high as 25 mph.

    High: 77 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 57. Breezy.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: A 20 percent chance of showers before 1pm.  Sunny, with a high near 87.

    High: 87 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and noon. Partly sunny, with a high near 82. Windy, with a west wind 18 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 50. Breezy, with a northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Wednesday
Sunny, with a high near 73. North northwest wind 8 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
Clear, with a low around 46. North wind around 6 mph becoming light and variable.
Thursday
Mostly sunny, with a high near 77. Breezy, with a south southeast wind 7 to 17 mph, with gusts as high as 25 mph.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 57. Breezy. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 20 percent chance of showers before 1pm. Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 89.
Saturday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 63. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87. Breezy. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
8:36 am CDT May 12, 2026
9am CDT May 12, 2026-6pm CDT May 18, 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