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Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Light Unknown Precip Fog/Mist

13°F

-11°C

Humidity 86%
Wind Speed Calm
Barometer 29.99 in (1017.7 mb)
Dewpoint 10°F (-12°C)
Visibility 2.50 mi
Last update 21 Jan 1:55 am CST
Extended Forecast for

Tomah WI

Extreme Cold Watch January 23, 12:00am until January 24, 12:00pm
Click here for hazard details and duration
Extreme Cold Watch

  • Overnight

    Overnight: A slight chance of snow before 3am, then a slight chance of snow after 5am. Cloudy, with a steady temperature around 10. Light southwest wind. Chance of precipitation is 20%.

    Low: 10 °F

    Slight Chance
    Snow

  • Wednesday

    Wednesday: Snow showers, mainly after 1pm. High near 22. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.

    High: 22 °F

    Cloudy then
    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers, mainly before 9pm. Low around 3. Wind chill values as low as -10. Breezy, with a west wind 10 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 3 °F

    Breezy. Snow
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 13. Wind chill values as low as -12. West wind 6 to 14 mph, with gusts as high as 24 mph.

    High: 13 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -20. Northwest wind around 11 mph, with gusts as high as 24 mph.

    Low: -20 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -8. Northwest wind 5 to 10 mph, with gusts as high as 22 mph.

    High: -8 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -21. Light northwest wind.

    Low: -21 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 0. Calm wind.

    High: 0 °F

    Cold

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around -13. Calm wind.

    Low: -13 °F

    Partly Cloudy

Detailed Forecast

Overnight
A slight chance of snow before 3am, then a slight chance of snow after 5am. Cloudy, with a steady temperature around 10. Light southwest wind. Chance of precipitation is 20%.
Wednesday
Snow showers, mainly after 1pm. High near 22. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Wednesday Night
Snow showers, mainly before 9pm. Low around 3. Wind chill values as low as -10. Breezy, with a west wind 10 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
Mostly sunny, with a high near 13. Wind chill values as low as -12. West wind 6 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Partly cloudy, with a low around -20. Northwest wind around 11 mph, with gusts as high as 24 mph.
Friday
Mostly sunny and cold, with a high near -8. Northwest wind 5 to 10 mph, with gusts as high as 22 mph.
Friday Night
Partly cloudy, with a low around -21. Light northwest wind.
Saturday
Mostly sunny and cold, with a high near 0. Calm wind.
Saturday Night
Partly cloudy, with a low around -13. Calm wind.
Sunday
Partly sunny, with a high near 8. Calm wind becoming northwest around 5 mph.
Sunday Night
Partly cloudy, with a low around -11. Calm wind becoming west around 5 mph after midnight.
Monday
Mostly sunny, with a high near 13. West wind 5 to 8 mph.
Monday Night
Partly cloudy, with a low around -2. West wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 19. West wind 3 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
2:41 am CST Jan 21, 2026
Forecast Valid:
2am CST Jan 21, 2026-6pm CST Jan 27, 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