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.

Overcast

30°F

-1°C

Humidity 85%
Wind Speed N 20 mph
Barometer 29.56 in (1002.1 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 19 Feb 5:53 pm CST
Extended Forecast for

Thornton IA

Winter Weather Advisory until February 20, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until February 20, 06:00am

    NOW until 6:00am Fri

    Winter Weather Advisory

  • Tonight

    Low: 19 °F

    Snow and
    Windy

  • Friday

    Friday: Partly sunny, with a high near 30. Wind chill values as low as 5. Blustery, with a northwest wind 13 to 20 mph, with gusts as high as 30 mph.

    High: 30 °F

    Partly Sunny
    and Blustery

  • Friday Night

    Friday Night: Partly cloudy, with a low around 16. Wind chill values as low as 5. Northwest wind 8 to 10 mph.

    Low: 16 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 28. Wind chill values as low as 5. Blustery, with a northwest wind 10 to 16 mph, with gusts as high as 21 mph.

    High: 28 °F

    Partly Sunny
    then Partly
    Sunny and
    Blustery

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 23 mph.

    Low: 10 °F

    Partly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Sunday

    Sunday: Sunny, with a high near 22. Windy.

    High: 22 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 7. Blustery.

    Low: 7 °F

    Partly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 26.

    High: 26 °F

    Sunny

Detailed Forecast

Tonight
Snow, mainly before 3am. Low around 19. Wind chill values as low as 5. Windy, with a north northeast wind 15 to 21 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 2 to 4 inches possible.
Friday
Partly sunny, with a high near 30. Wind chill values as low as 5. Blustery, with a northwest wind 13 to 20 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 16. Wind chill values as low as 5. Northwest wind 8 to 10 mph.
Saturday
Partly sunny, with a high near 28. Wind chill values as low as 5. Blustery, with a northwest wind 10 to 16 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 10. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 22. Windy.
Sunday Night
Partly cloudy, with a low around 7. Blustery.
Monday
Sunny, with a high near 26.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
Mostly sunny, with a high near 43. Breezy.
Tuesday Night
Mostly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Mostly clear, with a low around 20.
Thursday
Sunny, with a high near 47.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
3:21 pm CST Feb 19, 2026
Forecast Valid:
6pm CST Feb 19, 2026-6pm CST Feb 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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