Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Mostly Cloudy

80°F

27°C

Humidity	82%
Wind Speed	Calm
Barometer	30.02 in (1015.8 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	85°F (29°C)
Last update	15 Aug 3:53 pm CDT

More Information:

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

Extended Forecast for

Grundy Center IA

This Afternoon
High: 80 °F
Slight Chance
T-storms
Tonight
Low: 68 °F
Chance
T-storms
Sunday
High: 79 °F
Mostly Sunny
Sunday Night
Low: 59 °F
Mostly Clear
Monday
High: 80 °F
Sunny
Monday Night
Low: 63 °F
Partly Cloudy
then Chance
Showers
Tuesday
High: 81 °F
Chance
Showers then
Showers
Likely
Tuesday Night
Low: 62 °F
Showers
Wednesday
High: 76 °F
Partly Sunny

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Calm wind.

Tonight

A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68. Calm wind becoming west northwest around 5 mph after midnight. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

Mostly sunny, with a high near 79. North northwest wind 6 to 13 mph, with gusts as high as 18 mph.

Sunday Night

Mostly clear, with a low around 59. Northwest wind 3 to 8 mph.

Monday

Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.

Monday Night

A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63.

Tuesday

A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.

Tuesday Night

Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 62. Chance of precipitation is 80%.

Wednesday

Partly sunny, with a high near 76.

Wednesday Night

Partly cloudy, with a low around 55.

Thursday

Mostly sunny, with a high near 76.

Thursday Night

Partly cloudy, with a low around 58.

Friday

A 30 percent chance of showers. Mostly sunny, with a high near 77.