Severe Thunderstorms in the Central Plains and Lower Missouri Valley; Heat Continues in the Southeast and Southwest

Severe thunderstorms capable of large hail and damaging wind gusts are forecast to impact the central Plains into the Lower Missouri Valley through this afternoon. Dangerous heat persists across the southern Plains, Southeast U.S. and Puerto Rico this week, and will return to the Southwest today. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

A Few Clouds

69°F

21°C

Humidity 87%
Wind Speed W 9 mph
Barometer 29.95 in (1012.9 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 18 Aug 6:53 am CDT
Extended Forecast for

Rockwell IASimilar City Names

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 5pm.  Partly sunny, with a high near 78. Light and variable wind becoming west 5 to 8 mph in the morning.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am.  Partly cloudy, with a low around 58. Light north northwest wind.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Calm wind.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.  Sunny, with a high near 79. Calm wind becoming south southwest 5 to 8 mph in the afternoon.  Chance of precipitation is 20%.

    High: 79 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 61. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 82.

    High: 82 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 60.

    Low: 60 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 78. Light and variable wind becoming west 5 to 8 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Partly cloudy, with a low around 58. Light north northwest wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly sunny, with a high near 77. Calm wind.
Wednesday Night
Partly cloudy, with a low around 56. Calm wind.
Thursday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 79. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 82.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Partly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Rockwell IASimilar City Names
 42.97°N 93.19°W
6:31 am CDT Aug 18, 2026
7am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
 
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