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

Tracking Atmospheric River for the West Coast; Space Weather Storming Continues

An atmospheric river will bring threats of gusty to high winds and heavy rainfall to California mainly Thursday into Saturday which may bring areas of flooding and wind damage. Heavy snow will be possible over the Sierra Nevada mountains Thursday into Friday associated with the atmospheric river. Minor to severe geomagnetic storming (space weather) is expected to continue into early Thursday. Read More >

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Fair

40°F

4°C

Humidity 61%
Wind Speed Calm
Barometer 29.99 in (1016.7 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 12 Nov 6:55 pm CST
Extended Forecast for

4 Miles S Sparta / Fort McCoy Airport WI

  • Tonight

    Tonight: Mostly clear, with a low around 24. West wind around 6 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 55. Light southwest wind.

    High: 55 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62. Calm wind becoming south around 6 mph in the afternoon.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. South wind around 6 mph, with gusts as high as 18 mph.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 61. Southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 61 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29. Northwest wind around 8 mph, with gusts as high as 22 mph.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 47. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 47 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 22. Northwest wind around 5 mph becoming calm in the evening.

    Low: 22 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 24. West wind around 6 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Thursday
Mostly sunny, with a high near 55. Light southwest wind.
Thursday Night
Mostly clear, with a low around 32. Calm wind.
Friday
Sunny, with a high near 62. Calm wind becoming south around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 45. South wind around 6 mph, with gusts as high as 18 mph.
Saturday
Partly sunny, with a high near 61. Southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Mostly clear, with a low around 29. Northwest wind around 8 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 47. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 22. Northwest wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 44. Calm wind becoming north 5 to 7 mph in the afternoon.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. East wind around 5 mph. Chance of precipitation is 50%.
Tuesday
A 20 percent chance of rain. Mostly sunny, with a high near 45. Northeast wind 5 to 7 mph becoming light and variable in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 25. Light east wind.
Wednesday
Partly sunny, with a high near 44. East wind 3 to 6 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Sparta / Fort McCoy Airport WI
 43.91°N 90.76°W
Last Update:
4:46 pm CST Nov 12, 2025
Forecast Valid:
7pm CST Nov 12, 2025-6pm CST Nov 19, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation