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July 20, 2026 - Tornado Track Update

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Overcast

63°F

17°C

Humidity	93%
Wind Speed	NW 6 mph
Barometer	30.06 in (1017.3 mb)
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Last update	4 Aug 10:53 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Rockwell IA

Tonight
Low: 56 °F
Showers
Likely
Wednesday
High: 75 °F
Decreasing
Clouds
Wednesday Night
Low: 52 °F
Mostly Clear
Thursday
High: 79 °F
Sunny
Thursday Night
Low: 58 °F
Mostly Clear
Friday
High: 82 °F
Mostly Sunny
then Slight
Chance
T-storms
Friday Night
Low: 60 °F
Slight Chance
T-storms
Saturday
High: 81 °F
Sunny
Saturday Night
Low: 63 °F
Chance
T-storms

Detailed Forecast

Tonight

Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Cloudy, with a low around 56. North wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

Mostly cloudy, then gradually becoming sunny, with a high near 75. Calm wind becoming north around 5 mph.

Wednesday Night

Mostly clear, with a low around 52. Calm wind.

Thursday

Sunny, with a high near 79. Calm wind becoming south around 6 mph in the afternoon.

Thursday Night

Mostly clear, with a low around 58. South wind 3 to 5 mph.

Friday

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

Friday Night

A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 60.