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

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Fair

44°F

7°C

Humidity 93%
Wind Speed NW 7 mph
Barometer 30.25 in (1024.6 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 19 May 11:53 pm CDT
Extended Forecast for

Grundy Center IA

  • Overnight

    Overnight: Partly cloudy, with a low around 40. North northwest wind around 7 mph.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 61. North northeast wind 7 to 9 mph.

    High: 61 °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 10 percent chance of showers after 1pm.  Mostly cloudy, with a high near 61. East wind around 11 mph.

    High: 61 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly after 1am.  Cloudy, with a low around 44. East wind around 11 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely.  Mostly cloudy, with a high near 60. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 60 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers.  Mostly cloudy, with a low around 46. Chance of precipitation is 30%.

    Low: 46 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 40. North northwest wind around 7 mph.
Wednesday
Increasing clouds, with a high near 61. North northeast wind 7 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 43. East northeast wind 5 to 7 mph.
Thursday
A 10 percent chance of showers after 1pm. Mostly cloudy, with a high near 61. East wind around 11 mph.
Thursday Night
Showers likely, mainly after 1am. Cloudy, with a low around 44. East wind around 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers likely. Mostly cloudy, with a high near 60. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 71.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 53.
Memorial Day
Sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Grundy Center IA
 42.36°N 92.76°W
10:11 pm CDT May 19, 2026
12am CDT May 20, 2026-6pm CDT May 26, 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