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

Dangerous Winter Storm Through Monday Morning

A dangerous winter storm will unfold will continue through Monday morning bringing heavy snowfall (possibly record-breaking for some) and blizzard conditions. Make appropriate preparations, as power outages will be possible. Travel will become dangerous, if not impossible. Read More >

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

32°F

0°C

Humidity 66%
Wind Speed NE 14 G 25 mph
Barometer 29.60 in (1003.6 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 15 Mar 4:55 pm CDT
Extended Forecast for

Sparta WI

Winter Storm Warning March 15, 05:44pm until March 16, 01:00pm
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning March 15, 05:44pm until March 16, 01:00pm

    NOW until 1:00pm Mon

    Winter Storm Warning

  • This Afternoon

    High: 33 °F

    Chance Snow
    and Breezy

  • Tonight

    Tonight: Snow, mainly after 8pm. Widespread blowing snow, mainly after 1am. Low around 15. Blustery, with a north wind 18 to 22 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Low: 15 °F

    Snow and
    Blowing Snow

  • Monday

    Monday: Snow likely, mainly before 11am. Areas of blowing snow. Cloudy, with a high near 20. Wind chill values as low as -2. Blustery, with a northwest wind 20 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 20 °F

    Snow Likely
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -3. Wind chill values as low as -11. Northwest wind 5 to 11 mph, with gusts as high as 25 mph.

    Low: -3 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 23. Light and variable wind.

    High: 23 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow, mainly before 1am. Low around 16. South wind 3 to 6 mph. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 16 °F

    Snow

  • Wednesday

    Wednesday: Partly sunny, with a high near 45. South wind 3 to 5 mph.

    High: 45 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.

    Low: 29 °F

    Slight Chance
    Rain

Detailed Forecast

This Afternoon
A 30 percent chance of snow. Cloudy, with a high near 33. Breezy, with a north wind around 20 mph, with gusts as high as 30 mph.
Tonight
Snow, mainly after 8pm. Widespread blowing snow, mainly after 1am. Low around 15. Blustery, with a north wind 18 to 22 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Monday
Snow likely, mainly before 11am. Areas of blowing snow. Cloudy, with a high near 20. Wind chill values as low as -2. Blustery, with a northwest wind 20 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around -3. Wind chill values as low as -11. Northwest wind 5 to 11 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 23. Light and variable wind.
Tuesday Night
Snow, mainly before 1am. Low around 16. South wind 3 to 6 mph. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday
Partly sunny, with a high near 45. South wind 3 to 5 mph.
Wednesday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 49. Calm wind.
Thursday Night
Mostly cloudy, with a low around 31. Calm wind becoming south around 5 mph after midnight.
Friday
Partly sunny, with a high near 53. Southwest wind 5 to 7 mph.
Friday Night
Mostly cloudy, with a low around 32. West wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 55. Northwest wind 5 to 8 mph.
Saturday Night
Mostly cloudy, with a low around 30. North wind around 6 mph becoming light and variable.
Sunday
Mostly cloudy, with a high near 46. East wind 5 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
5:26 pm CDT Mar 15, 2026
Forecast Valid:
5pm CDT Mar 15, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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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