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

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

34°F

1°C

Humidity 87%
Wind Speed Calm
Barometer 29.80 in (1010.0 mb)
Dewpoint 31°F (-1°C)
Visibility 8.00 mi
Last update 11 Mar 1:55 am CDT
Extended Forecast for

Tomah WI

Winter Weather Advisory March 11, 02:46am until March 11, 01:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory March 11, 02:46am until March 11, 01:00pm

    NOW until 1:00pm Wed

    Winter Weather Advisory

  • Overnight

    Low: 33 °F

    Cloudy

  • Wednesday

    Wednesday: Snow showers and freezing rain likely before 9am, then snow showers between 9am and 2pm. High near 40. North wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.

    High: 40 °F

    Wintry Mix
    then Snow
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 22. West wind 3 to 8 mph. Winds could gust as high as 20 mph.

    Low: 22 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of rain and snow showers between 1pm and 4pm, then a chance of rain showers after 4pm. Increasing clouds, with a high near 44. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    High: 44 °F

    Sunny then
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain showers before 4am, then snow showers likely. Low around 28. Breezy, with a south wind 10 to 15 mph becoming west 18 to 23 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Breezy.
    Showers then
    Rain/Snow

  • Friday

    Friday: Snow showers likely before 7am. Partly sunny, with a high near 39. Windy, with a northwest wind 23 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Windy. Snow
    Showers
    Likely then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20. Northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 39. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Overnight
Cloudy, with a steady temperature around 33. North wind around 7 mph.
Wednesday
Snow showers and freezing rain likely before 9am, then snow showers between 9am and 2pm. High near 40. North wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.
Wednesday Night
Mostly clear, with a low around 22. West wind 3 to 8 mph. Winds could gust as high as 20 mph.
Thursday
A chance of rain and snow showers between 1pm and 4pm, then a chance of rain showers after 4pm. Increasing clouds, with a high near 44. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
Rain showers before 4am, then snow showers likely. Low around 28. Breezy, with a south wind 10 to 15 mph becoming west 18 to 23 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday
Snow showers likely before 7am. Partly sunny, with a high near 39. Windy, with a northwest wind 23 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Mostly cloudy, with a low around 20. Northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Saturday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 39. Calm wind becoming southeast around 6 mph in the afternoon.
Saturday Night
Snow. Low around 24. East wind 7 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.
Sunday
Snow. High near 34. Breezy, with an east wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 11. Blustery, with a northwest wind 16 to 18 mph, with gusts as high as 31 mph.
Monday
Partly sunny, with a high near 25. Blustery, with a northwest wind 15 to 17 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 3. Northwest wind 5 to 9 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 29. Southwest wind 3 to 6 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
2:32 am CDT Mar 11, 2026
Forecast Valid:
2am CDT Mar 11, 2026-6pm CDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation