National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Weekend Storm Impacts

A storm and trailing cold front will continue to slowly move through the Gulf Coast and Southeast U.S. through this weekend with widespread rain showers and isolated thunderstorms. A fast-moving clipper storm may bring several inches of snow to the north-central Plains, Midwest, eastern Great Lakes, and Northeast regions this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Overcast

25°F

-4°C

Humidity 93%
Wind Speed N 16 G 23 mph
Barometer 29.97 in
Dewpoint 23°F (-5°C)
Visibility 8.00 mi
Wind Chill12°F (-11°C)
Last update 7 Dec 12:35 am CST
Extended Forecast for

Portsmouth IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 9. North wind around 11 mph, with gusts as high as 22 mph.

    Low: 9 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a steady temperature around 13. North wind 5 to 10 mph becoming light north northeast in the afternoon. Winds could gust as high as 18 mph.

    High: 13 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a steady temperature around 11. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 11 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. South wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 42. South southwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 42 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 19. Blustery, with a west southwest wind 10 to 18 mph becoming northwest after midnight. Winds could gust as high as 28 mph.

    Low: 19 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 27. Northwest wind 9 to 17 mph, with gusts as high as 26 mph.

    High: 27 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A slight chance of snow. Mostly cloudy, with a low around 15. North wind 7 to 9 mph becoming south southeast after midnight. Winds could gust as high as 16 mph.

    Low: 15 °F

    Slight Chance
    Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 9. North wind around 11 mph, with gusts as high as 22 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a steady temperature around 13. North wind 5 to 10 mph becoming light north northeast in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Mostly cloudy, with a steady temperature around 11. Calm wind becoming south southeast around 6 mph after midnight.
Monday
Mostly sunny, with a high near 31. South wind 6 to 13 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 23. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Tuesday
Mostly cloudy, with a high near 42. South southwest wind 6 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 19. Blustery, with a west southwest wind 10 to 18 mph becoming northwest after midnight. Winds could gust as high as 28 mph.
Wednesday
Mostly cloudy, with a high near 27. Northwest wind 9 to 17 mph, with gusts as high as 26 mph.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 15. North wind 7 to 9 mph becoming south southeast after midnight. Winds could gust as high as 16 mph.
Thursday
A slight chance of snow before noon. Mostly cloudy, with a high near 25. West northwest wind around 11 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 4. North northwest wind around 10 mph, with gusts as high as 17 mph.
Friday
Partly sunny, with a high near 12. Northwest wind 10 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around -3. North northwest wind 6 to 9 mph, with gusts as high as 16 mph.
Saturday
Partly sunny, with a high near 11. North northwest wind 6 to 9 mph becoming south southeast in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
12:35 am CST Dec 7, 2025
Forecast Valid:
12am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation