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

Current conditions at

Atlantic (KAIO)

Lat: 41.4°NLon: 95.05°WElev: 1181ft.

Mostly Cloudy

75°F

24°C

Humidity	83%
Wind Speed	Calm
Barometer	29.97 in
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Last update	6 Sep 4:55 pm CDT

More Information:

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

Extended Forecast for

Griswold IA

Severe T-storm Watch until September 6, 10:00pm

Click here for hazard details and duration

...

Severe T-storm Watch until September 6, 10:00pm
NOW until 10:00pm Sun
Severe T-storm Watch
Tonight
Low: 67 °F
Severe
Thunderstorms
then Chance
Showers
Labor Day
High: 87 °F
Chance
Showers then
Sunny
Monday Night
Low: 70 °F
Partly Cloudy
Tuesday
High: 92 °F
Partly Sunny
then Chance
T-storms
Tuesday Night
Low: 67 °F
Showers
Wednesday
High: 82 °F
Mostly Sunny
Wednesday Night
Low: 59 °F
Mostly Clear
Thursday
High: 81 °F
Sunny

Detailed Forecast

Tonight

Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and 10pm, then a chance of showers and thunderstorms after 10pm. Some of the storms could be severe. Mostly cloudy, with a low around 67. East southeast wind 8 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Labor Day

A 40 percent chance of showers before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 87. Southeast wind 11 to 15 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.

Monday Night

Partly cloudy, with a low around 70. Southeast wind 13 to 15 mph, with gusts as high as 23 mph.

Tuesday

A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 92. Heat index values as high as 105. South wind 10 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

Tuesday Night

Showers and possibly a thunderstorm. Low around 67. Northwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday

Mostly sunny, with a high near 82.

Wednesday Night

Mostly clear, with a low around 59.

Thursday

Sunny, with a high near 81.

Thursday Night

Mostly clear, with a low around 61.

Friday

A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85.

Friday Night

A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 63.