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

Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

A Few Clouds with Haze

66°F

19°C

Humidity 84%
Wind Speed E 3 mph
Barometer 30.37 in (1027.9 mb)
Dewpoint 61°F (16°C)
Visibility 4.00 mi
Last update 1 Aug 7:53 pm CDT
Extended Forecast for

Thornton IA

  • Tonight

    Tonight: Areas of smoke before midnight. Partly cloudy, with a low around 52. Light east wind.

    Low: 52 °F

    Areas Smoke
    then Partly
    Cloudy

  • Saturday

    Saturday: Areas of smoke after 11am. Mostly sunny, with a high near 74. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 74 °F

    Areas Smoke

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53. South southeast wind 3 to 6 mph.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 74. South southeast wind 3 to 8 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. South southeast wind 3 to 6 mph.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Areas of smoke before midnight. Partly cloudy, with a low around 52. Light east wind.
Saturday
Areas of smoke after 11am. Mostly sunny, with a high near 74. Calm wind becoming south southeast 5 to 7 mph in the morning.
Saturday Night
Partly cloudy, with a low around 53. South southeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 74. South southeast wind 3 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 55. South southeast wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.4°W
Last Update:
6:21 pm CDT Aug 1, 2025
Forecast Valid:
8pm CDT Aug 1, 2025-6pm CDT Aug 8, 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