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

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Partly Cloudy and Breezy

62°F

17°C

Humidity 58%
Wind Speed W 25 G 32 mph
Barometer 29.58 in (1001.0 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 17 Apr 1:53 pm CDT
Extended Forecast for

Thornton IA

Tornado Watch until April 17, 08:00pm
Click here for hazard details and duration
Tornado Watch
  •  
    Tornado Watch until April 17, 08:00pm

    NOW until 8:00pm Fri

    Tornado Watch

  • This Afternoon

    High: 76 °F

    Chance
    T-storms and
    Windy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Windy, with a northwest wind 20 to 24 mph, with gusts as high as 31 mph.

    Low: 30 °F

    Decreasing
    Clouds and
    Windy

  • Saturday

    Saturday: Sunny, with a high near 48. Windy, with a west northwest wind 17 to 23 mph, with gusts as high as 30 mph.

    High: 48 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 30. Blustery, with a west northwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 24 mph.

    Low: 30 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 52. Northwest wind 8 to 15 mph, with gusts as high as 20 mph.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 28.

    Low: 28 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62. Breezy.

    High: 62 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 47. Breezy.

    Low: 47 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms before 3pm. Mostly cloudy, with a high near 76. Windy, with a west southwest wind 26 to 28 mph becoming northwest. Winds could gust as high as 34 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Windy, with a northwest wind 20 to 24 mph, with gusts as high as 31 mph.
Saturday
Sunny, with a high near 48. Windy, with a west northwest wind 17 to 23 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 30. Blustery, with a west northwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 24 mph.
Sunday
Sunny, with a high near 52. Northwest wind 8 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 28.
Monday
Sunny, with a high near 62. Breezy.
Monday Night
Partly cloudy, with a low around 47. Breezy.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Clear, with a low around 45.
Wednesday
Sunny, with a high near 76. Breezy.
Wednesday Night
Partly cloudy, with a low around 56. Breezy.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 76. Windy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
1:26 pm CDT Apr 17, 2026
Forecast Valid:
2pm CDT Apr 17, 2026-6pm CDT Apr 23, 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