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

38°F

3°C

Humidity 74%
Wind Speed NE 9 mph
Barometer 29.81 in (1010.5 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 10 Mar 8:55 pm CDT
Extended Forecast for

Tomah WI

Winter Weather Advisory March 10, 11:00pm until March 11, 01:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 5am. Cloudy, with a low around 28. Northeast wind 7 to 13 mph, with gusts as high as 23 mph.

    Low: 28 °F

    Cloudy then
    Chance
    Showers

  • Wednesday

    Wednesday: Snow, mainly before 1pm. High near 38. North wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 38 °F

    Snow then
    Snow Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 22 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of rain and snow between 1pm and 4pm, then a slight chance of rain after 4pm. Increasing clouds, with a high near 45. Light west wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 45 °F

    Sunny then
    Slight Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain before 1am, then rain and snow likely. Low around 29. Breezy, with a south wind 9 to 14 mph becoming west 16 to 21 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Breezy. Rain
    then
    Rain/Snow

  • Friday

    Friday: Snow likely before 7am. Partly sunny, with a high near 42. Breezy, with a northwest wind 20 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Breezy. Snow
    Likely then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow showers. Mostly cloudy, with a high near 41. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 41 °F

    Chance Snow
    Showers

  • Saturday Night

    Saturday Night: Rain and snow showers likely. Cloudy, with a low around 24. East wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 24 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly after 5am. Cloudy, with a low around 28. Northeast wind 7 to 13 mph, with gusts as high as 23 mph.
Wednesday
Snow, mainly before 1pm. High near 38. North wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Partly cloudy, with a low around 22. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Thursday
A slight chance of rain and snow between 1pm and 4pm, then a slight chance of rain after 4pm. Increasing clouds, with a high near 45. Light west wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Thursday Night
Rain before 1am, then rain and snow likely. Low around 29. Breezy, with a south wind 9 to 14 mph becoming west 16 to 21 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday
Snow likely before 7am. Partly sunny, with a high near 42. Breezy, with a northwest wind 20 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Mostly cloudy, with a low around 21. Northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
A 40 percent chance of snow showers. Mostly cloudy, with a high near 41. Calm wind becoming southeast 5 to 7 mph in the morning.
Saturday Night
Rain and snow showers likely. Cloudy, with a low around 24. East wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Sunday
Rain and snow showers likely before 1pm, then a chance of snow showers. Mostly cloudy, with a high near 33. Breezy, with a northeast wind 11 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of snow showers. Mostly cloudy, with a low around 7. Northwest wind 11 to 14 mph, with gusts as high as 28 mph.
Monday
Partly sunny, with a high near 23. Northwest wind around 11 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 3. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 31. Calm wind becoming southwest 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
9:32 pm CDT Mar 10, 2026
Forecast Valid:
9pm CDT Mar 10, 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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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation