Heavy Rainfall and Severe Thunderstorms in the Midwest and Ohio Valley Tuesday

Multiple rounds of severe thunderstorms appear likely Tuesday across the Midwest and Ohio Valley, with severe wind gusts in excess of 75 mph as the primary threat. Heavy to excessive rainfall may lead to considerable flash and urban flooding impacts Tuesday across portions of the Ohio Valley. A Moderate Risk (level 3 of 4) of excessive rainfall has been issued. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

73°F

23°C

Humidity	94%
Wind Speed	E 3 mph
Barometer	29.92 in (1011.8 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Last update	11 Aug 12:53 am CDT

More Information:

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

Extended Forecast for

Clear Lake IA

Overnight
Low: 71 °F
T-storms
Likely
Tuesday
High: 83 °F
Heavy Rain
then Mostly
Sunny
Tuesday Night
Low: 66 °F
Partly Cloudy
then Slight
Chance
T-storms
Wednesday
High: 82 °F
Slight Chance
T-storms then
Slight Chance
Showers
Wednesday Night
Low: 65 °F
Partly Cloudy
then Chance
Showers
Thursday
High: 76 °F
Showers
Likely
Thursday Night
Low: 61 °F
Slight Chance
T-storms then
Chance
Showers
Friday
High: 73 °F
Chance
Showers then
Chance
T-storms
Friday Night
Low: 61 °F
Showers
Likely

Detailed Forecast

Overnight

Showers and thunderstorms likely, mainly after 4am. Mostly cloudy, with a steady temperature around 71. East wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday

A 40 percent chance of showers and thunderstorms, mainly before 9am. Some of the storms could produce heavy rainfall. Cloudy, then gradually becoming mostly sunny, with a high near 83. East wind around 6 mph becoming light and variable in the afternoon. New precipitation amounts between a quarter and half of an inch possible.

Tuesday Night

A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 66. Light east wind.

Wednesday

A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. East wind 3 to 5 mph. Chance of precipitation is 20%.

Wednesday Night

A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 65. Light east northeast wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday

Showers likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 76. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

Friday

A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.

Friday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.

Saturday

A 40 percent chance of showers. Mostly cloudy, with a high near 76.

Saturday Night

A 40 percent chance of showers. Mostly cloudy, with a low around 61.

Sunday

Partly sunny, with a high near 74.

Sunday Night

Partly cloudy, with a low around 58.