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

Hazardous Weather Conditions

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fog

41°F

5°C

Humidity 100%
Wind Speed NE 3 mph
Barometer 29.98 in
Dewpoint 41°F (5°C)
Visibility 0.50 mi
Last update 4 Mar 8:55 pm CST
Extended Forecast for

4 Miles NNW Montrose IA

Dense Fog Advisory until March 5, 06:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 5, 06:00am

    NOW until 6:00am Thu

    Dense Fog Advisory

  • Tonight

    Low: 41 °F

    Showers
    Likely and
    Patchy Fog

  • Thursday

    Thursday: A 40 percent chance of showers, mainly before 8am. Areas of fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 62. Calm wind becoming northwest around 5 mph.

    High: 62 °F

    Chance
    Showers and
    Areas Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm after midnight. Increasing clouds, with a low around 47. Light southeast wind becoming south 5 to 10 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    Low: 47 °F

    Mostly Cloudy
    then Rain
    Likely

  • Friday

    Friday: Rain and possibly a thunderstorm before noon, then a chance of rain between noon and 3pm, then a chance of rain and thunderstorms after 3pm. High near 76. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 76 °F

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm. Low around 43. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Rain

  • Saturday

    Saturday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 5am, then a chance of showers after 5am. Patchy fog. Otherwise, cloudy, with a low around 41. Calm wind. Chance of precipitation is 60%.
Thursday
A 40 percent chance of showers, mainly before 8am. Areas of fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 62. Calm wind becoming northwest around 5 mph.
Thursday Night
Rain likely and possibly a thunderstorm after midnight. Increasing clouds, with a low around 47. Light southeast wind becoming south 5 to 10 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Friday
Rain and possibly a thunderstorm before noon, then a chance of rain between noon and 3pm, then a chance of rain and thunderstorms after 3pm. High near 76. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Friday Night
Rain and possibly a thunderstorm. Low around 43. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Partly sunny, with a high near 55.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 65.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 73.
Monday Night
A 40 percent chance of rain and thunderstorms. Partly cloudy, with a low around 56.
Tuesday
Rain likely. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 35. Chance of precipitation is 70%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 48. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Montrose IA
 40.57°N 91.44°W (Elev. 551 ft)
Last Update:
8:46 pm CST Mar 4, 2026
Forecast Valid:
9pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation