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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Overcast

28°F

-2°C

Humidity 80%
Wind Speed SW 2 mph
Barometer 29.91 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 1 Jan 6:15 pm CST
Extended Forecast for

2 Miles ENE Carthage IL

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 23. Calm wind becoming north around 5 mph in the evening.

    Low: 23 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly cloudy, with a high near 33. Northeast wind 5 to 10 mph.

    High: 33 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 23. Northeast wind around 5 mph.

    Low: 23 °F

    Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 35. Northeast wind around 5 mph becoming northwest in the afternoon.

    High: 35 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 23. Calm wind becoming north around 5 mph in the evening.
Friday
Mostly cloudy, with a high near 33. Northeast wind 5 to 10 mph.
Friday Night
Cloudy, with a low around 23. Northeast wind around 5 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 35. Northeast wind around 5 mph becoming northwest in the afternoon.
Saturday Night
Mostly clear, with a low around 21.
Sunday
Partly sunny, with a high near 38.
Sunday Night
Partly cloudy, with a low around 33.
Monday
Mostly sunny, with a high near 53.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
Partly sunny, with a high near 54.
Tuesday Night
Partly cloudy, with a low around 31.
Wednesday
Sunny, with a high near 51.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Carthage IL
 40.43°N 91.1°W (Elev. 676 ft)
Last Update:
5:56 pm CST Jan 1, 2026
Forecast Valid:
6pm CST Jan 1, 2026-6pm CST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation