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

Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

55°F

13°C

Humidity 47%
Wind Speed S 18 G 32 mph
Barometer 29.91 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 2 Nov 3:15 pm CST
Extended Forecast for

Portsmouth IA

  • Tonight

    Tonight: Mostly clear, with a low around 35. South wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 60. Northwest wind around 6 mph becoming calm in the afternoon.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40. Calm wind becoming southeast 5 to 7 mph after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 66. South southwest wind 6 to 10 mph, with gusts as high as 17 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39. Light and variable wind becoming north northwest 5 to 7 mph after midnight.

    Low: 39 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 59. North wind 5 to 9 mph becoming light in the afternoon.

    High: 59 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36. Calm wind becoming southeast 5 to 9 mph after midnight.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 60. South wind 10 to 15 mph, with gusts as high as 22 mph.

    High: 60 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. South wind 7 to 9 mph becoming west northwest after midnight. Winds could gust as high as 16 mph.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 35. South wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Monday
Sunny, with a high near 60. Northwest wind around 6 mph becoming calm in the afternoon.
Monday Night
Mostly cloudy, with a low around 40. Calm wind becoming southeast 5 to 7 mph after midnight.
Tuesday
Sunny, with a high near 66. South southwest wind 6 to 10 mph, with gusts as high as 17 mph.
Tuesday Night
Mostly clear, with a low around 39. Light and variable wind becoming north northwest 5 to 7 mph after midnight.
Wednesday
Sunny, with a high near 59. North wind 5 to 9 mph becoming light in the afternoon.
Wednesday Night
Partly cloudy, with a low around 36. Calm wind becoming southeast 5 to 9 mph after midnight.
Thursday
Partly sunny, with a high near 60. South wind 10 to 15 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 41. South wind 7 to 9 mph becoming west northwest after midnight. Winds could gust as high as 16 mph.
Friday
Sunny, with a high near 60. West northwest wind 8 to 14 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 37. Northwest wind around 7 mph becoming southeast after midnight.
Saturday
Mostly sunny, with a high near 57. South southeast wind 8 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 32. North northwest wind 7 to 9 mph, with gusts as high as 16 mph.
Sunday
Mostly sunny, with a high near 46. North northwest wind 8 to 11 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.53°W (Elev. 1250 ft)
Last Update:
3:17 pm CST Nov 2, 2025
Forecast Valid:
3pm CST Nov 2, 2025-6pm CST Nov 9, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation