Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Partly Cloudy

91°F

33°C

Humidity	59%
Wind Speed	S 14 G 21 mph
Barometer	29.95 in (1013.1 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	102°F (39°C)
Last update	17 Aug 3:53 pm CDT

More Information:

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

Extended Forecast for

4 Miles NNW Le Grand IA

This Afternoon
High: 92 °F
Slight Chance
T-storms
Tonight
Low: 72 °F
Mostly Clear
then Chance
T-storms
Monday
High: 88 °F
Chance
T-storms
Monday Night
Low: 69 °F
Chance
T-storms
Tuesday
High: 84 °F
Mostly Sunny
Tuesday Night
Low: 62 °F
Mostly Clear
Wednesday
High: 80 °F
Sunny
Wednesday Night
Low: 59 °F
Mostly Clear
Thursday
High: 78 °F
Sunny

Detailed Forecast

This Afternoon

A 10 percent chance of showers and thunderstorms after 5pm. Sunny, with a high near 92. Heat index values as high as 101. South wind around 8 mph.

Tonight

A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 72. Southeast wind around 7 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

A 30 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 88. South southeast wind 7 to 11 mph becoming west southwest in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday Night

A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 69. West northwest wind around 6 mph becoming light and variable after midnight. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday

Mostly sunny, with a high near 84. North wind 5 to 7 mph.

Tuesday Night

Mostly clear, with a low around 62.

Wednesday

Sunny, with a high near 80.

Wednesday Night

Mostly clear, with a low around 59.

Thursday

Sunny, with a high near 78.

Thursday Night

Mostly clear, with a low around 59.