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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

64°F

18°C

Humidity 71%
Wind Speed S 8 mph
Barometer 29.94 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 11 Oct 12:15 am CDT
Extended Forecast for

Sully IA

  • Overnight

    Overnight: Clear, with a low around 59. South southeast wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 85. South wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 69. South southwest wind around 9 mph.

    Low: 69 °F

    Mostly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 88. South southwest wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers, mainly after 1am. Partly cloudy, with a low around 58.

    Low: 58 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Partly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 59. South southeast wind 8 to 10 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 85. South wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 69. South southwest wind around 9 mph.
Columbus Day
Sunny, with a high near 88. South southwest wind 8 to 14 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 64. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 78.
Tuesday Night
A 50 percent chance of showers, mainly after 1am. Partly cloudy, with a low around 58.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 70.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 55.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 67.
Thursday Night
Mostly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 61. Breezy.
Friday Night
Partly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
10:26 pm CDT Oct 10, 2026
Forecast Valid:
12am CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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