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 >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Overcast

55°F

13°C

Humidity 77%
Wind Speed W 13 mph
Barometer 30.14 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 19 May 8:15 pm CDT
Extended Forecast for

4 Miles W Denmark IA

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. Northeast wind around 10 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. East wind 5 to 10 mph.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm.  Partly sunny, with a high near 69. East wind around 10 mph, with gusts as high as 20 mph.

    High: 69 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after 1am.  Cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely.  Mostly cloudy, with a high near 65. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 65 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am.  Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. North wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 66. Northeast wind around 10 mph.
Wednesday Night
Partly cloudy, with a low around 45. East wind 5 to 10 mph.
Thursday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 69. East wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
A 50 percent chance of showers after 1am. Cloudy, with a low around 50.
Friday
Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Friday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 51.
Saturday
Partly sunny, with a high near 75.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Partly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 56.
Memorial Day
Partly sunny, with a high near 84.
Monday Night
Mostly cloudy, with a low around 60.
Tuesday
Partly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Denmark IA
 40.74°N 91.41°W (Elev. 719 ft)
6:56 pm CDT May 19, 2026
8pm CDT May 19, 2026-6pm CDT May 26, 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