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

Significant Coastal Impacts to the Mid-Atlantic and Northeast; Tropical Storm Nolo to Impact Hawaii

A strong coastal storm will bring moderate to major coastal flooding, strong winds, heavy rainfall and high surf to the Mid-Atlantic and New England. Tropical Storm Nolo is expected to strengthen into a hurricane today as it moves north toward the Big Island of Hawaii. Heavy rainfall may produce life-threatening, catastrophic flooding and mudslides. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

59°F

15°C

Humidity 87%
Wind Speed S 12 mph
Barometer 30.35 in (1027.3 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Sep 9:53 am CDT
Extended Forecast for

Thornton IA

  • Today

    Today: A 40 percent chance of showers, mainly after 3pm. Mostly cloudy, with a high near 65. South southeast wind 6 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 65 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tonight

    Tonight: Showers likely, mainly before 4am. Cloudy, with a low around 55. Light southeast wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers before 10am, then a slight chance of showers after 1pm. Mostly cloudy, with a high near 66. Calm wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers after 1am. Cloudy, with a low around 55. Southeast wind 6 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Cloudy then
    Chance
    Showers

  • Saturday

    Saturday: Showers. High near 63. Southeast wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 54. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 67.

    High: 67 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 70.

    High: 70 °F

    Mostly Cloudy

Detailed Forecast

Today
A 40 percent chance of showers, mainly after 3pm. Mostly cloudy, with a high near 65. South southeast wind 6 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers likely, mainly before 4am. Cloudy, with a low around 55. Light southeast wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers before 10am, then a slight chance of showers after 1pm. Mostly cloudy, with a high near 66. Calm wind becoming southeast 5 to 7 mph in the morning. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 50 percent chance of showers after 1am. Cloudy, with a low around 55. Southeast wind 6 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers. High near 63. Southeast wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 54. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 67.
Sunday Night
Mostly cloudy, with a low around 53.
Monday
Mostly cloudy, with a high near 70.
Monday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 57.
Tuesday
Showers likely. Cloudy, with a high near 65. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
9:43 am CDT Sep 24, 2026
Forecast Valid:
10am CDT Sep 24, 2026-6pm CDT Sep 30, 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