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

76°F

24°C

Humidity	94%
Wind Speed	SE 6 mph
Barometer	29.95 in (1013.1 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	76°F (24°C)
Last update	18 Aug 2:53 am CDT

More Information:

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

Extended Forecast for

3 Miles NNE Le Grand IA

Overnight
Low: 75 °F
Scattered
T-storms
Monday
High: 89 °F
Chance
T-storms
Monday Night
Low: 70 °F
Chance
T-storms then
Chance
Showers
Tuesday
High: 86 °F
Mostly Sunny
Tuesday Night
Low: 64 °F
Mostly Clear
Wednesday
High: 80 °F
Sunny
Wednesday Night
Low: 59 °F
Mostly Clear
Thursday
High: 79 °F
Sunny
Thursday Night
Low: 59 °F
Mostly Clear

Detailed Forecast

Overnight

Scattered showers and thunderstorms, mainly after 5am. Partly cloudy, with a steady temperature around 75. Light south southeast wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday

A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 89. South wind 6 to 9 mph becoming west southwest in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

A 30 percent chance of showers and thunderstorms, mainly between 1am and 2am. Partly cloudy, with a low around 70. West wind around 5 mph becoming light and variable in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday

Mostly sunny, with a high near 86. North wind 3 to 7 mph.

Tuesday Night

Mostly clear, with a low around 64. North wind around 6 mph.

Wednesday

Sunny, with a high near 80.

Wednesday Night

Mostly clear, with a low around 59.

Thursday

Sunny, with a high near 79.

Thursday Night

Mostly clear, with a low around 59.