National Weather Service United States Department of Commerce

Severe weather possible for parts of northern Plains and mid/upper Mississippi River Valley

Severe thunderstorms are expected across portions of the northern Plains and upper Mississippi Valley Wednesday. Large hail and damaging winds will be the main threats with these storms, but a tornado or two could occur as well. Other strong to severe storms may occur from late afternoon into the overnight hours from the middle Mississippi Valley into the lower Ohio Valley.
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Hazardous Weather Conditions

Current Conditions

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Mason City IA

7 Day Forecast

For More Weather Information:

Des Moines, IA Local Forecast Office

Overnight

Mostly Clear

Mostly
Clear

Low: 61 °F

Wednesday

Increasing Clouds

Increasing
Clouds

High: 83 °F

Wednesday
Night

Thunderstorms Likely Chance for Measurable Precipitation 70%

Thunderstorms
Likely

Low: 69 °F

Thursday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 90 °F

Thursday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 68 °F

Friday

Chance Thunderstorms Chance for Measurable Precipitation 40%

Chance
Thunderstorms

High: 88 °F

Friday
Night

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

Low: 68 °F

Saturday

Chance Thunderstorms Chance for Measurable Precipitation 40%

Chance
Thunderstorms

High: 84 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 40%

Chance
Thunderstorms

Low: 65 °F

Detailed Forecast

  • Overnight Mostly clear, with a low around 61. Calm wind.
  • Wednesday Increasing clouds, with a high near 83. Calm wind becoming south southeast 5 to 8 mph in the morning.
  • Wednesday Night Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 69. Southeast wind 7 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
  • Thursday A 30 percent chance of showers and thunderstorms, mainly before 10am. Partly sunny, with a high near 90. South southwest wind 9 to 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
  • Thursday Night A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68. Southwest wind 5 to 8 mph becoming northwest after midnight.
  • Friday A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
  • Friday Night A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
  • Saturday A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
  • Saturday Night A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
  • Sunday A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
  • Sunday Night A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
  • Monday Partly sunny, with a high near 75.
  • Monday Night Partly cloudy, with a low around 55.
  • Tuesday A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74.