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 and Windy

31°F

-1°C

Humidity 85%
Wind Speed NW 32 G 46 mph
Barometer 29.47 in (998.6 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 10 Dec 2:53 am CST
Extended Forecast for

Thornton IA

Winter Weather Advisory until December 10, 06:00am
High Wind Warning until December 10, 09:00am
Click here for hazard details and duration
Winter Weather Advisory
High Wind Warning
  •  
    Winter Weather Advisory until December 10, 06:00am
    High Wind Warning until December 10, 09:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 21 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Wednesday

    Wednesday: A slight chance of snow between 11am and 2pm. Cloudy, with a temperature falling to around 18 by 5pm. Wind chill values as low as 5. Windy, with a northwest wind 25 to 30 mph decreasing to 14 to 19 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 20%.

    High: 24 °F⇓

    Slight Chance
    Snow and
    Windy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 8. Northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 8 °F

    Mostly Cloudy

  • Thursday

    Thursday: Snow, mainly after noon. High near 21. Wind chill values as low as 5. Calm wind becoming south southeast 5 to 9 mph in the morning. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 21 °F

    Slight Chance
    Snow then
    Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 10. Southeast wind 6 to 8 mph becoming north northwest after midnight. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 10 °F

    Snow Likely
    then Slight
    Chance Snow

  • Friday

    Friday: Mostly cloudy, with a high near 17. Blustery.

    High: 17 °F

    Mostly Cloudy
    and Blustery

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Cloudy, with a low around -3.

    Low: -3 °F

    Cloudy then
    Slight Chance
    Snow

  • Saturday

    Saturday: Snow likely, mainly before noon. Mostly cloudy and cold, with a high near 3. Chance of precipitation is 60%.

    High: 3 °F

    Snow Likely

Detailed Forecast

Overnight
A 30 percent chance of snow. Patchy blowing snow before 5am. Cloudy, with a low around 21. Wind chill values as low as 10. Windy, with a west northwest wind around 31 mph, with gusts as high as 46 mph. Total nighttime snow accumulation of less than a half inch possible.
Wednesday
A slight chance of snow between 11am and 2pm. Cloudy, with a temperature falling to around 18 by 5pm. Wind chill values as low as 5. Windy, with a northwest wind 25 to 30 mph decreasing to 14 to 19 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 8. Northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Thursday
Snow, mainly after noon. High near 21. Wind chill values as low as 5. Calm wind becoming south southeast 5 to 9 mph in the morning. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 10. Southeast wind 6 to 8 mph becoming north northwest after midnight. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday
Mostly cloudy, with a high near 17. Blustery.
Friday Night
A 20 percent chance of snow after midnight. Cloudy, with a low around -3.
Saturday
Snow likely, mainly before noon. Mostly cloudy and cold, with a high near 3. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around -15.
Sunday
Sunny and cold, with a high near 2.
Sunday Night
Partly cloudy, with a low around -7.
Monday
Mostly sunny, with a high near 23.
Monday Night
Mostly cloudy, with a low around 9.
Tuesday
Partly sunny, with a high near 32.
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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:
2:36 am CST Dec 10, 2025
Forecast Valid:
2am CST Dec 10, 2025-6pm CST Dec 16, 2025
 
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