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.

Freezing Fog and Windy

20°F

-7°C

Humidity 92%
Wind Speed NW 40 G 53 mph
Barometer 29.84 in (1011.7 mb)
Dewpoint 18°F (-8°C)
Visibility 0.50 mi
Wind Chill-1°F (-18°C)
Last update 15 Mar 9:53 pm CDT
Extended Forecast for

Thornton IA

Cold Weather Advisory March 16, 01:00am until March 16, 10:00am
Blizzard Warning March 15, 10:08pm until March 16, 07:00am
High Wind Warning March 15, 10:08pm until March 16, 04:00am
Click here for hazard details and duration
Cold Weather Advisory
Blizzard Warning
High Wind Warning
  •  
    Blizzard Warning March 15, 10:08pm until March 16, 07:00am
    High Wind Warning March 15, 10:08pm until March 16, 04:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 1 °F

    Snow Likely
    and Blowing
    Snow

  • Monday

    Monday: Widespread blowing snow, mainly before noon. Partly sunny and cold, with a high near 10. Wind chill values as low as -25. Windy, with a northwest wind 26 to 33 mph, with gusts as high as 39 mph.

    High: 10 °F

    Blowing Snow
    and Windy

  • Monday Night

    Monday Night: Patchy blowing snow before 7pm. Partly cloudy, with a low around -2. Wind chill values as low as -15. Windy, with a northwest wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 28 mph.

    Low: -2 °F

    Patchy
    Blowing Snow
    and Windy
    then Mostly
    Clear

  • Tuesday

    Tuesday: A 30 percent chance of snow after 1pm. Partly sunny, with a high near 25. Wind chill values as low as -15. Light and variable wind becoming south 8 to 13 mph in the afternoon. New snow accumulation of less than one inch possible.

    High: 25 °F

    Mostly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: Snow likely before 1am. Mostly cloudy, with a low around 19. South southeast wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Snow Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

Detailed Forecast

Tonight
Snow likely, mainly before 11pm. Widespread blowing snow. Cloudy, with a low around 1. Wind chill values as low as -20. Very windy, with a north northwest wind 37 to 41 mph, with gusts as high as 50 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of 1 to 3 inches possible.
Monday
Widespread blowing snow, mainly before noon. Partly sunny and cold, with a high near 10. Wind chill values as low as -25. Windy, with a northwest wind 26 to 33 mph, with gusts as high as 39 mph.
Monday Night
Patchy blowing snow before 7pm. Partly cloudy, with a low around -2. Wind chill values as low as -15. Windy, with a northwest wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 28 mph.
Tuesday
A 30 percent chance of snow after 1pm. Partly sunny, with a high near 25. Wind chill values as low as -15. Light and variable wind becoming south 8 to 13 mph in the afternoon. New snow accumulation of less than one inch possible.
Tuesday Night
Snow likely before 1am. Mostly cloudy, with a low around 19. South southeast wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Partly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Partly sunny, with a high near 66.
Friday Night
Mostly cloudy, with a low around 37.
Saturday
Sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 55. Breezy.
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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:
9:58 pm CDT Mar 15, 2026
Forecast Valid:
10pm CDT Mar 15, 2026-6pm CDT Mar 22, 2026
 
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Additional Resources

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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