Heat Persists in the South Central U.S. and California; Heavy Rain in the Ohio Valley

Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley, as well as in the Southwest and California this week with limited nighttime relief. Heavy rainfall will lead to localized areas of flash flooding in parts of the Ohio Valley/Central Appalachians. Dry and breezy conditions will enhance fire weather concerns across the northern Rockies and High Plains. Read More >

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

60°F

16°C

Humidity	90%
Wind Speed	NW 3 mph
Barometer	30.05 in (1016.6 mb)
Dewpoint	57°F (14°C)
Visibility	10.00 mi
Last update	9 Sep 11:53 pm CDT

More Information:

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

Extended Forecast for

Thornton IA

Overnight
Low: 54 °F
Partly Cloudy
Thursday
High: 77 °F
Patchy Fog
then Sunny
Thursday Night
Low: 57 °F
Mostly Clear
Friday
High: 78 °F
Sunny and
Breezy
Friday Night
Low: 62 °F
Chance
Showers and
Breezy
Saturday
High: 74 °F
Slight Chance
Showers
Saturday Night
Low: 53 °F
Mostly Clear
then Slight
Chance
T-storms
Sunday
High: 71 °F
Chance
T-storms
Sunday Night
Low: 60 °F
Chance
T-storms then
Showers
Likely

Detailed Forecast

Overnight

Partly cloudy, with a low around 54. Light west northwest wind.

Thursday

Patchy fog before 8am. Otherwise, sunny, with a high near 77. Calm wind.

Thursday Night

Mostly clear, with a low around 57. Calm wind becoming south 5 to 8 mph in the evening.

Friday

Sunny, with a high near 78. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.

Friday Night

A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 62. Breezy, with a south wind 10 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A 20 percent chance of showers before 1pm. Partly sunny, with a high near 74.

Saturday Night

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 53.

Sunday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 71.

Sunday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

Monday

Showers and possibly a thunderstorm. High near 78. Breezy. Chance of precipitation is 80%.

Monday Night

A 50 percent chance of showers. Mostly cloudy, with a low around 55.

Tuesday

Partly sunny, with a high near 69.

Tuesday Night

Partly cloudy, with a low around 53.

Wednesday

A 40 percent chance of showers. Partly sunny, with a high near 69.