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

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Overcast

71°F

22°C

Humidity	96%
Wind Speed	E 8 mph
Barometer	30.02 in (1016.2 mb)
Dewpoint	70°F (21°C)
Visibility	7.00 mi
Last update	15 Aug 12:53 am CDT

More Information:

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

Extended Forecast for

Garwin IA

Flood Watch August 15, 01:19am until August 15, 10:00am

Click here for hazard details and duration

Flood Watch

Flood Watch August 15, 01:19am until August 15, 10:00am
NOW until 10:00am Sat
Flood Watch
Overnight
Low: 73 °F
Heavy Rain
and Patchy
Fog
Saturday
High: 87 °F
Chance
T-storms and
Patchy Fog
Saturday Night
Low: 67 °F
Chance
T-storms then
Chance
Showers
Sunday
High: 81 °F
Slight Chance
T-storms then
Mostly Sunny
Sunday Night
Low: 60 °F
Mostly Clear
Monday
High: 81 °F
Sunny
Monday Night
Low: 61 °F
Mostly Clear
Tuesday
High: 82 °F
Chance
T-storms

Detailed Forecast

Overnight

A 40 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Patchy fog after 2am. Otherwise, cloudy, with a steady temperature around 73. East wind around 8 mph. New rainfall amounts between three quarters and one inch possible.

Saturday

A chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 5pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 87. Heat index values as high as 100. Southeast wind around 6 mph becoming west northwest in the afternoon. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

A 50 percent chance of showers and thunderstorms, mainly before 2am. Increasing clouds, with a low around 67. West northwest wind 3 to 6 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

A 10 percent chance of showers and thunderstorms before 7am. Partly sunny, with a high near 81. North northwest wind 5 to 10 mph.

Sunday Night

Mostly clear, with a low around 60. Northwest wind 3 to 7 mph.

Monday

Sunny, with a high near 81.

Monday Night

Mostly clear, with a low around 61.

Tuesday

A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 82.

Tuesday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.