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

82°F

28°C

Humidity 42%
Wind Speed S 14 G 18 mph
Barometer 29.97 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 10 Oct 12:35 pm CDT
Extended Forecast for

Sully IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. South wind around 14 mph, with gusts as high as 25 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 59. South southeast wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 84. South wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68. South wind around 9 mph.

    Low: 68 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 85. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely, mainly before 1pm. Partly sunny, with a high near 69. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 87. South wind around 14 mph, with gusts as high as 25 mph.
Tonight
Clear, with a low around 59. South southeast wind 8 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 84. South wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 68. South wind around 9 mph.
Columbus Day
Sunny, with a high near 85. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 74.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 55.
Wednesday
Showers likely, mainly before 1pm. Partly sunny, with a high near 69. Chance of precipitation is 60%.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 67.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 60. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
12:16 pm CDT Oct 10, 2026
Forecast Valid:
12pm CDT Oct 10, 2026-6pm CDT Oct 16, 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