Severe Thunderstorms and Heavy Rain in the Mid-Atlantic; Heat Persists Across the South

Scattered severe thunderstorms and excessive rainfall are possible into the night in the Mid Atlantic, and heavy rain will shift to Virginia and the Carolinas on Friday. Severe thunderstorms are also possible in the Central Plains into the Upper MS Valley and the Deep South tonight. Dangerous heat persists across the Southern Plains and Lower MS Valley and heat will expand into the Southwest. Read More >

Hazardous Weather Conditions

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

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

Mostly Cloudy

69°F

21°C

Humidity 84%
Wind Speed S 7 mph
Barometer 30.01 in (1015.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 21 Aug 3:53 am CDT
Detailed forecast for

Marshall County

Today
Mostly sunny after midnight, then becoming sunny. A slight chance of showers and thunderstorms after midnight. Humid with highs in the mid 80s. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming west this afternoon. Chance of rain 20 percent.
Tonight
Mostly clear. Lows in the lower 60s. North winds 5 to 10 mph.
Saturday
Sunny. Highs in the lower 80s. Northwest winds 5 to 10 mph.
Saturday Night
Mostly clear. Lows in the upper 50s. North winds 5 to 10 mph.
Sunday
Mostly sunny. Highs in the upper 70s. Northeast winds around 5 mph in the morning, becoming light and variable.
Sunday Night
Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the upper 50s. Chance of rain 20 percent.
Monday
Mostly cloudy in the morning, then becoming mostly sunny. A slight chance of thunderstorms in the morning. A chance of showers. Highs in the upper 70s. Chance of rain 40 percent.
Monday Night
Partly cloudy. Lows in the lower 60s.
Tuesday
Mostly sunny. Highs in the lower 80s.
Tuesday Night
Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 60s. Chance of rain 40 percent.
Wednesday
Sunny. A slight chance of showers in the morning. Highs in the lower 80s. Chance of rain 20 percent.
Wednesday Night
Mostly clear. Lows in the lower 60s.
Thursday
Sunny. Highs in the lower 80s.



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233 AM CDT Fri Aug 21 2026
 
 

Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database