Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

Fair

82°F

28°C

Humidity	66%
Wind Speed	E 13 G 23 mph
Barometer	29.96 in
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	6 Sep 4:35 pm CDT

More Information:

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

Extended Forecast for

Marysville IA

This Afternoon
High: 84 °F
Partly Sunny
Tonight
Low: 67 °F
Chance
Showers then
Mostly Cloudy
Labor Day
High: 86 °F
Decreasing
Clouds
Monday Night
Low: 68 °F
Partly Cloudy
Tuesday
High: 93 °F
Mostly Sunny
then Slight
Chance
T-storms
Tuesday Night
Low: 72 °F
Chance
T-storms then
Showers
Wednesday
High: 85 °F
Chance
Showers
Wednesday Night
Low: 62 °F
Partly Cloudy
Thursday
High: 81 °F
Sunny

Detailed Forecast

This Afternoon

Partly sunny, with a high near 84. East wind around 9 mph.

Tonight

A chance of showers between 9pm and 11pm. Mostly cloudy, with a low around 67. East southeast wind around 7 mph. Chance of precipitation is 30%.

Labor Day

Mostly cloudy, then gradually becoming sunny, with a high near 86. East southeast wind 7 to 10 mph, with gusts as high as 18 mph.

Monday Night

Partly cloudy, with a low around 68. South southeast wind around 10 mph, with gusts as high as 18 mph.

Tuesday

A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 93. South southwest wind around 10 mph. Chance of precipitation is 20%.

Tuesday Night

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 72. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday

A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.

Wednesday Night

Partly cloudy, with a low around 62.

Thursday

Sunny, with a high near 81.

Thursday Night

Mostly clear, with a low around 61.

Friday

Sunny, with a high near 86.

Friday Night

A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 65.

Saturday

A 30 percent chance of showers. Mostly sunny, with a high near 86.