Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

29°F

-2°C

Humidity 61%
Wind Speed SW 6 mph
Barometer 29.89 in (1013.4 mb)
Dewpoint 17°F (-8°C)
Visibility NA
Wind Chill23°F (-5°C)
Last update 9 Dec 10:54 pm EST
Extended Forecast for

Portland PA

  • Tonight

    Tonight: Cloudy, with a low around 22. South wind around 5 mph.

    Low: 22 °F

    Cloudy

  • Wednesday

    Wednesday: Rain, snow, and freezing rain before 3pm, then a chance of rain between 3pm and 5pm, then a chance of rain and snow after 5pm.  High near 40. South wind 5 to 10 mph, with gusts as high as 25 mph.  Chance of precipitation is 100%. Little or no ice accumulation expected.  Little or no snow accumulation expected.

    High: 40 °F

    Wintry Mix
    Likely then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A slight chance of rain and snow, mainly between 10pm and 1am.  Mostly cloudy, with a low around 24. Southwest wind around 10 mph becoming west after midnight. Winds could gust as high as 25 mph.  Chance of precipitation is 20%.

    Low: 24 °F

    Slight Chance
    Rain/Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 35. West wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 35 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 21. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of snow after 1am.  Mostly cloudy, with a low around 20. Chance of precipitation is 40%.

    Low: 20 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Mostly cloudy, with a high near 38.

    High: 38 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of snow after 1am.  Mostly cloudy, with a low around 24. Chance of precipitation is 40%.

    Low: 24 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Cloudy, with a low around 22. South wind around 5 mph.
Wednesday
Rain, snow, and freezing rain before 3pm, then a chance of rain between 3pm and 5pm, then a chance of rain and snow after 5pm. High near 40. South wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. Little or no snow accumulation expected.
Wednesday Night
A slight chance of rain and snow, mainly between 10pm and 1am. Mostly cloudy, with a low around 24. Southwest wind around 10 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 35. West wind 10 to 15 mph, with gusts as high as 30 mph.
Thursday Night
Partly cloudy, with a low around 21. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 35.
Friday Night
A chance of snow after 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 40%.
Saturday
Mostly cloudy, with a high near 38.
Saturday Night
A chance of snow after 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Sunday
A chance of snow before 1pm. Partly sunny, with a high near 33. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 13.
Monday
Mostly sunny, with a high near 29.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 33.
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ABOUT THIS FORECAST

 
Point Forecast:
Portland PA
 40.93°N 75.08°W (Elev. 299 ft)
4:09 pm EST Dec 9, 2025
11pm EST Dec 9, 2025-6pm EST Dec 16, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database