Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Fair

86°F

30°C

Humidity 33%
Wind Speed S 14 mph
Barometer 29.80 in (1008.4 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 11 Oct 4:53 pm CDT
Extended Forecast for

Le Grand IA

  • Tonight

    Tonight: Mostly cloudy, with a low around 68. South wind 9 to 11 mph, with gusts as high as 18 mph.

    Low: 68 °F

    Mostly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 87. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 61. South southwest wind 6 to 10 mph becoming west northwest after midnight. Winds could gust as high as 18 mph.

    Low: 61 °F

    Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers after 1pm.  Sunny, with a high near 78. North northwest wind around 6 mph becoming calm  in the afternoon.  New precipitation amounts of less than a tenth of an inch possible.

    High: 78 °F

    Sunny then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers.  Mostly cloudy, with a low around 56. North wind 3 to 6 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers before 1pm.  Partly sunny, with a high near 69.

    High: 69 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 1am.  Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 1pm.  Mostly cloudy, with a high near 65. Chance of precipitation is 70%.

    High: 65 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 68. South wind 9 to 11 mph, with gusts as high as 18 mph.
Columbus Day
Sunny, with a high near 87. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Monday Night
Clear, with a low around 61. South southwest wind 6 to 10 mph becoming west northwest after midnight. Winds could gust as high as 18 mph.
Tuesday
A 30 percent chance of showers after 1pm. Sunny, with a high near 78. North northwest wind around 6 mph becoming calm in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 56. North wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 69.
Wednesday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 53.
Thursday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Thursday Night
Mostly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 57. Windy.
Friday Night
Mostly clear, with a low around 34.
Saturday
Sunny, with a high near 55.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
Le Grand IA
 42.01°N 92.77°W
5:21 pm CDT Oct 11, 2026
5pm CDT Oct 11, 2026-6pm CDT Oct 18, 2026
 
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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