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Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

-10°C

14°F

Humidity 77%
Wind Speed S 11 km/h
Barometer 1013.0 mb (29.85 in)
Dewpoint -13°C (8°F)
Visibility 16 km
Wind Chill-16°C (4°F)
Last update 5 Dec 2:53 am CST
Extended Forecast for

Clear Lake IA

Winter Storm Watch December 6, 06:00pm until December 7, 06:00am
Click here for hazard details and duration
Winter Storm Watch

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around -10. Wind chill values as low as -20. South southwest wind around 18 km/h.

    Low: -10 °C

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of snow, mainly between 8am and 11am. Mostly cloudy, with a high near -1. Wind chill values as low as -15. South southwest wind 14 to 16 km/h becoming west in the afternoon. Winds could gust as high as 32 km/h. Little or no snow accumulation expected.

    High: -1 °C

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around -12. Northwest wind 18 to 23 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 39 km/h.

    Low: -12 °C

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow after noon. Increasing clouds, with a high near -7. Wind chill values as low as -15. Northwest wind 5 to 14 km/h becoming east southeast in the morning. New snow accumulation of 1 to 3 centimeters possible.

    High: -7 °C

    Partly Sunny
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Snow, mainly before midnight. The snow could be heavy at times. Low around -15. East wind 14 to 16 km/h becoming north northeast after midnight. Chance of precipitation is 90%. New snow accumulation of 10 to 16 centimeters possible.

    Low: -15 °C

    Heavy Snow
    then Chance
    Snow

  • Sunday

    Sunday: Mostly sunny and cold, with a high near -12.

    High: -12 °C

    Cold

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -22.

    Low: -22 °C

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near -4.

    High: -4 °C

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around -11.

    Low: -11 °C

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around -10. Wind chill values as low as -20. South southwest wind around 18 km/h.
Friday
A 30 percent chance of snow, mainly between 8am and 11am. Mostly cloudy, with a high near -1. Wind chill values as low as -15. South southwest wind 14 to 16 km/h becoming west in the afternoon. Winds could gust as high as 32 km/h. Little or no snow accumulation expected.
Friday Night
A 20 percent chance of snow before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around -12. Northwest wind 18 to 23 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 39 km/h.
Saturday
A 50 percent chance of snow after noon. Increasing clouds, with a high near -7. Wind chill values as low as -15. Northwest wind 5 to 14 km/h becoming east southeast in the morning. New snow accumulation of 1 to 3 centimeters possible.
Saturday Night
Snow, mainly before midnight. The snow could be heavy at times. Low around -15. East wind 14 to 16 km/h becoming north northeast after midnight. Chance of precipitation is 90%. New snow accumulation of 10 to 16 centimeters possible.
Sunday
Mostly sunny and cold, with a high near -12.
Sunday Night
Mostly cloudy, with a low around -22.
Monday
Partly sunny, with a high near -4.
Monday Night
Mostly cloudy, with a low around -11.
Tuesday
Mostly cloudy, with a high near 1.
Tuesday Night
A 40 percent chance of rain. Cloudy, with a low around -7. Breezy.
Wednesday
Mostly cloudy, with a high near -2. Blustery.
Wednesday Night
Mostly cloudy, with a low around -17.
Thursday
Partly sunny, with a high near -8.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
3:16 am CST Dec 5, 2025
Forecast Valid:
3am CST Dec 5, 2025-6pm CST Dec 11, 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