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

Hazardous Weather Conditions

Current conditions at

Wittman Regional Airport (KOSH)

Lat: 43.97°NLon: 88.56°WElev: 801ft.

Fair

76°F

24°C

Humidity 58%
Wind Speed S 20 G 35 mph
Barometer 29.70 in (1005.1 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Apr 1:53 pm CDT
Extended Forecast for

2 Miles SE Green Lake WI

Flood Watch until April 18, 07:00am
Tornado Watch until April 17, 08:00pm
Click here for hazard details and duration
Flood Watch
Tornado Watch
  •  
    Flood Watch until April 18, 07:00am
    Tornado Watch until April 17, 08:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 76 °F

    Severe
    Thunderstorms
    and Windy

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 3am. Some of the storms could be severe. Low around 36. Breezy, with a south wind 15 to 20 mph becoming northwest after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Breezy.
    Severe
    Thunderstorms
    then Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 46. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph.

    High: 46 °F

    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 30. Breezy, with a west wind 10 to 20 mph, with gusts as high as 25 mph.

    Low: 30 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Sunday

    Sunday: A slight chance of rain and snow showers before 10am, then a slight chance of rain showers. Mostly sunny, with a high near 46. Northwest wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 27. Northwest wind 5 to 10 mph becoming east after midnight.

    Low: 27 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 52. South wind 5 to 10 mph.

    High: 52 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. South wind 10 to 15 mph.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. High near 76. Windy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 3am. Some of the storms could be severe. Low around 36. Breezy, with a south wind 15 to 20 mph becoming northwest after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Mostly sunny, with a high near 46. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 30. Breezy, with a west wind 10 to 20 mph, with gusts as high as 25 mph.
Sunday
A slight chance of rain and snow showers before 10am, then a slight chance of rain showers. Mostly sunny, with a high near 46. Northwest wind 10 to 15 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 27. Northwest wind 5 to 10 mph becoming east after midnight.
Monday
Mostly sunny, with a high near 52. South wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 41. South wind 10 to 15 mph.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Green Lake WI
 43.81°N 88.94°W (Elev. 850 ft)
Last Update:
1:56 pm CDT Apr 17, 2026
Forecast Valid:
2pm CDT Apr 17, 2026-6pm CDT Apr 23, 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