Nor'easter Bringing Dangerous Coastal Conditions to the Mid-Atlantic; Pacific Storm to Impact the Southwest U.S.

A Nor'easter well off the East Coast will slowly track north this week and may gain some subtropical characteristics. Strong onshore winds will bring flooding, dangerous marine conditions, and beach erosion along the Mid-Atlantic coast. A Pacific storm will bring gusty winds, showers and thunderstorms, and mountain snow to portions of California and the Southwest U.S. Wednesday and Thursday. Read More >

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11° N Lon: 92.92° W Elev: 971 ft.

Fair

70°F

21°C

Humidity 35%
Wind Speed S 14 mph
Barometer 30.25 in (1024.4 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 20 Oct 3:53 pm CDT
Detailed forecast for

Grundy County

Tonight
Clear. Lows in the mid 40s. South winds 5 to 10 mph.
Wednesday
Sunny. Highs in the mid 70s. South winds around 5 mph.
Wednesday Night
Mostly clear. Lows in the upper 40s. Light and variable winds.
Thursday
Sunny. Highs in the mid 70s. South winds around 5 mph.
Thursday Night
Mostly clear. Lows in the lower 50s. Southeast winds around 5 mph.
Friday
Mostly sunny. Highs in the lower 70s.
Friday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 50s.
Saturday
Partly sunny. Highs in the mid 70s.
Saturday Night
Mostly cloudy. Lows in the mid 50s.
Sunday
Mostly cloudy in the morning, then becoming partly sunny. A 20 percent chance of showers. Highs in the mid 60s.
Sunday Night
Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 40s. Chance of rain 30 percent.
Monday
Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Highs in the upper 50s. Chance of rain 20 percent.
Monday Night
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 40s.
Tuesday
Mostly sunny. Highs in the mid 50s.



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427 PM CDT Tue Oct 20 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database