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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

Wittman Regional Airport (KOSH)

Lat: 43.97°NLon: 88.56°WElev: 801ft.

Overcast

67°F

19°C

Humidity 87%
Wind Speed N 13 mph
Barometer 29.91 in (1011.8 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 2 Aug 4:53 am CDT
Extended Forecast for

Green Lake WI

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 78. Northeast wind around 10 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 55. Northeast wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South wind around 5 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Southwest wind 5 to 10 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. West wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 77. West wind around 5 mph. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 55. West wind around 5 mph becoming calm.

    Low: 55 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 78. Northeast wind around 10 mph.
Tonight
Mostly clear, with a low around 55. Northeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 58. South wind around 5 mph.
Tuesday
Mostly sunny, with a high near 83. Southwest wind 5 to 10 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. West wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 77. West wind around 5 mph. Chance of precipitation is 50%.
Wednesday Night
A 30 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 55. West wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 57.
Friday
Mostly sunny, with a high near 82.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 60.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Green Lake WI
 43.86°N 88.93°W (Elev. 846 ft)
Last Update:
4:33 am CDT Aug 2, 2026
Forecast Valid:
5am CDT Aug 2, 2026-6pm CDT Aug 8, 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