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

Isaias Expected To Be A Strong Hurricane Approaching The Northern Gulf Coast Friday

Isaias is expected to strengthen and be a strong hurricane when it approaches the northern Gulf Coast on Friday. Damaging hurricane-force winds and life-threatening storm surge impacts are expected Friday into Saturday. Isaias will bring heavy rainfall to the northern Gulf Coast and much of the Southeast U.S. Friday into the weekend. Read More >

Current conditions at

East Troy Municipal Airport (K57C)

Lat: 42.8°NLon: 88.37°WElev: 860ft.

Fair

49°F

9°C

Humidity 74%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 8 Oct 3:15 am CDT
Extended Forecast for

4 Miles SW Sullivan WI

  • Overnight

    Overnight: Partly cloudy, with a low around 47. Northwest wind around 5 mph.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 67. West wind 5 to 10 mph.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47. West wind around 5 mph becoming calm.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers between 2pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 70. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 40%.

    High: 70 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. Southeast wind 5 to 10 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80. South wind 10 to 15 mph.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. South wind 5 to 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 74. South wind around 5 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 47. Northwest wind around 5 mph.
Thursday
Mostly sunny, with a high near 67. West wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 47. West wind around 5 mph becoming calm.
Friday
A chance of showers between 2pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 70. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 40%.
Friday Night
Mostly clear, with a low around 58. Southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 80. South wind 10 to 15 mph.
Saturday Night
Partly cloudy, with a low around 59. South wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 74. South wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 55.
Columbus Day
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 51.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Sullivan WI
 42.96°N 88.63°W (Elev. 850 ft)
Last Update:
2:36 am CDT Oct 8, 2026
Forecast Valid:
3am CDT Oct 8, 2026-6pm CDT Oct 14, 2026
 
Forecast Discussion
 
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Additional Resources

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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