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.

Fog/Mist

74°F

23°C

Humidity	97%
Wind Speed	Calm
Barometer	30.02 in (1015.9 mb)
Dewpoint	73°F (23°C)
Visibility	6.00 mi
Last update	16 Aug 12:53 am CDT

More Information:

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

Extended Forecast for

Grundy Center IA

Overnight
Low: 73 °F
Mostly Cloudy
Sunday
High: 79 °F
Patchy Fog
then Partly
Sunny
Sunday Night
Low: 59 °F
Mostly Clear
Monday
High: 80 °F
Patchy Fog
then 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
Slight Chance
Showers
Wednesday Night
Low: 55 °F
Partly Cloudy

Detailed Forecast

Overnight

Mostly cloudy, with a steady temperature around 73. West northwest wind 3 to 5 mph.

Sunday

Patchy fog before 8am. Otherwise, partly sunny, with a high near 79. North northwest wind 8 to 13 mph.

Sunday Night

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

Monday

Patchy fog before 7am. Otherwise, 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. Calm wind becoming southwest around 6 mph after midnight.

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%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

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

Wednesday

A 20 percent chance of showers before 1pm. 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.