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

Severe Weather Likely this Afternoon and Evening

A line of severe thunderstorms are expected to develop mainly north of Interstate 90 later this afternoon and track to the east/northeast through the area. Large hail (2+"), damaging winds (60-70mph), and heavy rain of 2-3" are the main threats. A tornado cannot be ruled out if conditions line up just right. Read More >

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

A Few Clouds

77°F

25°C

Humidity 62%
Wind Speed SW 9 mph
Barometer 29.77 in (1008.0 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 13 Apr 12:55 pm CDT
Extended Forecast for

Sparta WI

Flood Watch April 13, 04:00pm until April 14, 07:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 78. South wind around 8 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 56. South wind 5 to 9 mph becoming light southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 56 °F

    T-storms
    Likely then
    Showers
    Likely and
    Patchy Fog

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 76. Calm wind becoming north around 6 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Patchy Fog
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 70. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 53. Light and variable wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers
    Likely

  • Thursday

    Thursday: A 40 percent chance of showers. Partly sunny, with a high near 71. Calm wind becoming west around 6 mph in the afternoon.

    High: 71 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 78. Breezy, with a southeast wind 6 to 16 mph, with gusts as high as 24 mph.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    Showers and
    Breezy

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 78. South wind around 8 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 56. South wind 5 to 9 mph becoming light southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 76. Calm wind becoming north around 6 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 70. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 53. Light and variable wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 71. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 50. Light and variable wind becoming southeast around 5 mph after midnight.
Friday
A 50 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 78. Breezy, with a southeast wind 6 to 16 mph, with gusts as high as 24 mph.
Friday Night
Showers and possibly a thunderstorm. Low around 42. South wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Saturday
A chance of rain and snow showers. Mostly cloudy, with a high near 53. Breezy, with a west wind 10 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Saturday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 27. West wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 51. Northwest wind 8 to 11 mph, with gusts as high as 20 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:
1:36 pm CDT Apr 13, 2026
Forecast Valid:
1pm CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation