Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

85°F

29°C

Humidity	70%
Wind Speed	SW 10 mph
Barometer	29.81 in (1007.9 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	30 Jun 5:53 pm CDT

More Information:

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

Extended Forecast for

4 Miles N Mason City IA

Extreme Heat Warning June 30, 06:27pm until July 1, 10:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning June 30, 06:27pm until July 1, 10:00pm
NOW until 10:00pm Wed
Extreme Heat Warning
Tonight
Low: 72 °F
Mostly Cloudy
then Showers
Likely
Wednesday
High: 90 °F
Chance
Showers then
Slight Chance
T-storms and
Breezy
Wednesday Night
Low: 70 °F
Showers
Thursday
High: 88 °F
Chance
T-storms
Thursday Night
Low: 70 °F
T-storms
Likely then
Showers
Friday
High: 89 °F
Chance
T-storms
Friday Night
Low: 69 °F
T-storms
Likely
Independence Day
High: 83 °F
Chance
T-storms

Detailed Forecast

Tonight

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 72. South southwest wind 7 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

A 50 percent chance of showers and thunderstorms, mainly before noon. Mostly sunny, with a high near 90. Breezy, with a south southwest wind 9 to 18 mph, with gusts as high as 28 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

Showers and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms between 2am and 4am, then showers likely and possibly a thunderstorm after 4am. Low around 70. South southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88. South southwest wind 6 to 8 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 70. South wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Friday

A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

Showers and thunderstorms likely, mainly after 1am. Partly cloudy, with a low around 69. Chance of precipitation is 60%.

Independence Day

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.

Saturday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.

Sunday

Partly sunny, with a high near 83.

Sunday Night

Partly cloudy, with a low around 65.

Monday

Mostly sunny, with a high near 84.