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

Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Great Lakes

Thunderstorms with strong wind gusts and hail will be possible today from Michigan into the Lower Great Lakes region. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Numerous daily record highs and warm lows are likely. Read More >

Hazardous Weather Conditions

Current conditions at

Ephraim-Gibraltar Airport (K3D2)

Lat: 45.14°NLon: 87.19°WElev: 773ft.

Overcast

65°F

18°C

Humidity 97%
Wind Speed S 8 mph
Barometer 29.72 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 21 Jun 9:35 am CDT
Extended Forecast for

Sister Bay WI

  • Today

    Today: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 80. South southwest wind 10 to 20 mph, with gusts as high as 36 mph.

    High: 80 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 69. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 85. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South southwest wind around 15 mph, with gusts as high as 23 mph.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Showers likely and possibly a thunderstorm after 1pm. Sunny, with a high near 81. South southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 81 °F

    Sunny then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.

    High: 68 °F

    Showers
    Likely

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 80. South southwest wind 10 to 20 mph, with gusts as high as 36 mph.
Tonight
Partly cloudy, with a low around 69. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 85. Southwest wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 73. South southwest wind around 15 mph, with gusts as high as 23 mph.
Monday
Showers likely and possibly a thunderstorm after 1pm. Sunny, with a high near 81. South southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 57. Chance of precipitation is 70%.
Thursday
Showers likely. Mostly cloudy, with a high near 71. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sister Bay WI
 45.19°N 87.12°W (Elev. 630 ft)
Last Update:
9:32 am CDT Jun 21, 2025
Forecast Valid:
9am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
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