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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

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

57°F

14°C

Humidity 61%
Wind Speed NE 6 mph
Barometer 30.13 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 8 Oct 8:35 am CDT
Extended Forecast for

Sully IA

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 75. Light and variable wind.

    High: 75 °F

    Becoming
    Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 56. Calm wind becoming east southeast around 5 mph after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 8am and 9am. Mostly cloudy through mid morning, then gradual clearing, with a high near 81. East southeast wind 7 to 11 mph becoming south in the afternoon. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 63. South wind around 8 mph.

    Low: 63 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 81. South wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 75. Light and variable wind.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 56. Calm wind becoming east southeast around 5 mph after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 8am and 9am. Mostly cloudy through mid morning, then gradual clearing, with a high near 81. East southeast wind 7 to 11 mph becoming south in the afternoon. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Clear, with a low around 63. South wind around 8 mph.
Saturday
Sunny, with a high near 81. South wind 9 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 61.
Columbus Day
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
8:32 am CDT Oct 8, 2026
Forecast Valid:
8am 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