Heat Expands for Center of the Nation; Severe Thunderstorms for Plains and Upper Midwest

Dangerous heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest. Critical fire weather for portions of the Intermountain West. Risk for severe thunderstorms and flash flooding across the Upper Midwest/Great Lakes, Ohio Valley, and portions of the mid-Atlantic. Active monsoonal moisture fuels thunderstorms over the Southwest. Hurricane Fausto in the Pacific, should weaken Read More >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

84°F

29°C

Humidity 89%
Wind Speed S 5 mph
Barometer 29.91 in
Dewpoint 81°F (27°C)
Visibility 9.00 mi
Heat Index98°F (37°C)
Last update 26 Jul 10:55 am CDT
Extended Forecast for

5 Miles NW Donnellson IA

Extreme Heat Watch July 26, 09:00pm until July 27, 10:00pm
Extreme Heat Warning until July 26, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
Extreme Heat Warning
  •  
    Extreme Heat Warning until July 26, 09:00pm

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • Today

    High: 96 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 77. Southwest wind around 5 mph.

    Low: 77 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 96. Heat index values as high as 111. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 96 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. West wind around 5 mph becoming north after midnight.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Today
A slight chance of showers before noon, then a slight chance of showers and thunderstorms between noon and 1pm. Mostly cloudy and hot, with a high near 96. Heat index values as high as 115. West wind around 5 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 77. Southwest wind around 5 mph.
Monday
Sunny and hot, with a high near 96. Heat index values as high as 111. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 74. West wind around 5 mph becoming north after midnight.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Mostly cloudy, with a low around 68.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 87.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NW Donnellson IA
 40.7°N 91.64°W (Elev. 709 ft)
10:16 am CDT Jul 26, 2026
11am CDT Jul 26, 2026-6pm CDT Aug 1, 2026
 
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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