Tropical Storm Watches for the Northern Mariana Islands; Severe Thunderstorms in the Northern Plains

Tropical Storm Watches have been issued for Agrihan, Pagan and Alamagan in the Northern Mariana Islands, as Tropical Depression 16W moves towards the islands and strengthens. Heavy rain and gusty winds are expected through Saturday. Severe thunderstorms and heavy rain are expected across the Northern Plains this afternoon into tonight. A few tornadoes, large hail, and severe winds are expected. Read More >

Hazardous Weather Conditions

Heat Advisory in effect from August 8, 01:00 PM CDT until August 8, 07:00 PM CDT

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Fair

81°F

27°C

Humidity	65%
Wind Speed	SE 9 mph
Barometer	30.04 in (1016.5 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	84°F (29°C)
Last update	7 Aug 3:53 pm CDT

More Information:

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

Extended Forecast for

Marshalltown IA

Heat Advisory August 8, 01:00pm until August 8, 07:00pm

Click here for hazard details and duration

Heat Advisory

This Afternoon
High: 83 °F
Mostly Sunny
Tonight
Low: 70 °F
Partly Cloudy
Friday
High: 91 °F
Sunny
Friday Night
Low: 74 °F
Mostly Clear
then Slight
Chance
T-storms
Saturday
High: 89 °F
Chance
T-storms
Saturday Night
Low: 68 °F
Chance
T-storms then
Heavy Rain
Sunday
High: 84 °F
T-storms
Likely
Sunday Night
Low: 65 °F
Showers
Likely
Monday
High: 83 °F
Chance
Showers

Detailed Forecast

This Afternoon

Mostly sunny, with a high near 83. South southeast wind around 10 mph.

Tonight

Partly cloudy, with a low around 70. South southeast wind around 8 mph.

Friday

Sunny, with a high near 91. Heat index values as high as 103. South wind 9 to 15 mph, with gusts as high as 23 mph.

Friday Night

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 11 to 13 mph, with gusts as high as 22 mph.

Saturday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. South southeast wind 8 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Some of the storms could produce heavy rainfall. Low around 68. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

Sunday

Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.

Sunday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 70%.

Monday

A 30 percent chance of showers. Partly sunny, with a high near 83.

Monday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.

Tuesday

Mostly sunny, with a high near 84.

Tuesday Night

Partly cloudy, with a low around 65.