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

Severe Thunderstorms and Critical Fire Weather Wednesday

Scattered severe thunderstorms are possible across portions of the northern High Plains Wednesday afternoon and evening. Severe wind gusts are the primary hazard. Gusty winds and low relative humidity will contribute to critical fire weather conditions across parts of the northern Great Plains and Great Basin Wednesday. Read More >

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Fair

56°F

13°C

Humidity 55%
Wind Speed N 15 mph
Barometer 30.13 in (1020.3 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 13 May 8:53 am CDT
Extended Forecast for

Grundy Center IA

  • Today

    Today: Sunny, with a high near 73. Breezy, with a north northwest wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 73 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Clear, with a low around 45. North wind 5 to 10 mph becoming light and variable.

    Low: 45 °F

    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 77. Windy, with a south wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 77 °F

    Mostly Sunny
    and Windy

  • Thursday Night

    Thursday Night: A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am, then a chance of showers after 1am. Mostly cloudy, with a low around 54. Breezy, with a south southeast wind 11 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Slight Chance
    T-storms and
    Breezy then
    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 86. South southeast wind around 8 mph becoming west in the afternoon.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am. Mostly clear, with a low around 55. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 86.

    High: 86 °F

    Sunny then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. Windy.

    High: 82 °F

    Chance
    T-storms and
    Windy

Detailed Forecast

Today
Sunny, with a high near 73. Breezy, with a north northwest wind 14 to 17 mph, with gusts as high as 26 mph.
Tonight
Clear, with a low around 45. North wind 5 to 10 mph becoming light and variable.
Thursday
Mostly sunny, with a high near 77. Windy, with a south wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.
Thursday Night
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am, then a chance of showers after 1am. Mostly cloudy, with a low around 54. Breezy, with a south southeast wind 11 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Sunny, with a high near 86. South southeast wind around 8 mph becoming west in the afternoon.
Friday Night
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am. Mostly clear, with a low around 55. Chance of precipitation is 20%.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 86.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. Windy.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Windy.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. Windy. Chance of precipitation is 60%.
Monday Night
Showers likely. Mostly cloudy, with a low around 52. Breezy. Chance of precipitation is 60%.
Tuesday
Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grundy Center IA
 42.36°N 92.76°W
Last Update:
6:31 am CDT May 13, 2026
Forecast Valid:
9am CDT May 13, 2026-6pm CDT May 19, 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