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

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

A Few Clouds

37°F

3°C

Humidity 87%
Wind Speed S 5 mph
Barometer 29.45 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 9 Dec 5:35 pm CST
Extended Forecast for

Portsmouth IA

High Wind Warning December 10, 12:00am until December 10, 08:00am
Click here for hazard details and duration
High Wind Warning

  • This Afternoon

    This Afternoon: A chance of sprinkles. Partly sunny, with a high near 43. West southwest wind around 11 mph.

    High: 43 °F

    Chance
    Sprinkles

  • Tonight

    Tonight: A chance of sprinkles before 8pm. Mostly cloudy, with a low around 26. Windy, with a west southwest wind 14 to 24 mph becoming northwest 24 to 34 mph after midnight. Winds could gust as high as 60 mph.

    Low: 26 °F

    Chance
    Sprinkles and
    Windy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 25 by 5pm. Windy, with a northwest wind 24 to 29 mph decreasing to 13 to 18 mph in the afternoon. Winds could gust as high as 48 mph.

    High: 28 °F⇓

    Mostly Cloudy
    and Windy
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 17. North northwest wind around 6 mph becoming calm.

    Low: 17 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of snow between noon and 3pm, then a slight chance of freezing rain after 3pm. Mostly cloudy, with a high near 32. South southeast wind 5 to 9 mph. Chance of precipitation is 20%.

    High: 32 °F

    Mostly Cloudy
    then Slight
    Chance Wintry
    Mix

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 19. Southeast wind 6 to 11 mph becoming north northwest after midnight. Winds could gust as high as 18 mph.

    Low: 19 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 24. North northwest wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 24 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A slight chance of snow after midnight. Cloudy, with a low around 7. North wind 5 to 10 mph, with gusts as high as 17 mph.

    Low: 7 °F

    Cloudy then
    Slight Chance
    Snow

  • Saturday

    Saturday: A chance of snow before noon. Mostly cloudy, with a high near 13. North wind 5 to 8 mph.

    High: 13 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
A chance of sprinkles. Partly sunny, with a high near 43. West southwest wind around 11 mph.
Tonight
A chance of sprinkles before 8pm. Mostly cloudy, with a low around 26. Windy, with a west southwest wind 14 to 24 mph becoming northwest 24 to 34 mph after midnight. Winds could gust as high as 60 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 25 by 5pm. Windy, with a northwest wind 24 to 29 mph decreasing to 13 to 18 mph in the afternoon. Winds could gust as high as 48 mph.
Wednesday Night
Mostly cloudy, with a low around 17. North northwest wind around 6 mph becoming calm.
Thursday
A slight chance of snow between noon and 3pm, then a slight chance of freezing rain after 3pm. Mostly cloudy, with a high near 32. South southeast wind 5 to 9 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 19. Southeast wind 6 to 11 mph becoming north northwest after midnight. Winds could gust as high as 18 mph.
Friday
Mostly cloudy, with a high near 24. North northwest wind 11 to 15 mph, with gusts as high as 23 mph.
Friday Night
A slight chance of snow after midnight. Cloudy, with a low around 7. North wind 5 to 10 mph, with gusts as high as 17 mph.
Saturday
A chance of snow before noon. Mostly cloudy, with a high near 13. North wind 5 to 8 mph.
Saturday Night
Partly cloudy, with a low around -6. North wind around 6 mph.
Sunday
Mostly sunny, with a high near 15. Northeast wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 16 mph.
Sunday Night
Partly cloudy, with a low around 7. South southeast wind around 9 mph, with gusts as high as 16 mph.
Monday
Mostly sunny, with a high near 32. South wind 7 to 10 mph becoming north in the afternoon. Winds could gust as high as 16 mph.
Monday Night
Partly cloudy, with a low around 13. North wind around 6 mph becoming light and variable.
Tuesday
Partly sunny, with a high near 35. South wind 5 to 10 mph, with gusts as high as 17 mph.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
4:06 pm CST Dec 9, 2025
Forecast Valid:
5pm CST Dec 9, 2025-6pm CST Dec 16, 2025
 
Forecast Discussion
 
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Additional Resources

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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