Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

35°F

2°C

Humidity 67%
Wind Speed SW 6 mph
Barometer 30.02 in (1017.8 mb)
Dewpoint 25°F (-4°C)
Visibility NA
Wind Chill30°F (-1°C)
Last update 7 Dec 6:54 pm EST
Extended Forecast for

Portland PA

  • Tonight

    Tonight: Partly cloudy, with a low around 20. Southwest wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 20 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 30. North wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 30 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 8. Calm wind.

    Low: 8 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 32. Calm wind becoming south around 5 mph in the afternoon.

    High: 32 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A slight chance of snow after 1am.  Mostly cloudy, with a low around 24. South wind around 5 mph becoming calm.  Chance of precipitation is 20%.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: Rain likely, possibly mixed with snow, becoming all rain after 1pm.  Cloudy, with a high near 43. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am.  Mostly cloudy, with a low around 29. Chance of precipitation is 30%.

    Low: 29 °F

    Chance Rain

  • Thursday

    Thursday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of snow after 1am.  Mostly cloudy, with a low around 23. Chance of precipitation is 30%.

    Low: 23 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 20. Southwest wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Monday
Mostly sunny, with a high near 30. North wind 5 to 10 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 8. Calm wind.
Tuesday
Increasing clouds, with a high near 32. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
A slight chance of snow after 1am. Mostly cloudy, with a low around 24. South wind around 5 mph becoming calm. Chance of precipitation is 20%.
Wednesday
Rain likely, possibly mixed with snow, becoming all rain after 1pm. Cloudy, with a high near 43. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 41.
Thursday Night
A chance of snow after 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Friday
A chance of snow. Partly sunny, with a high near 36. Chance of precipitation is 30%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 31.
Saturday Night
Partly cloudy, with a low around 16.
Sunday
Mostly sunny, with a high near 31.
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ABOUT THIS FORECAST

 
Point Forecast:
Portland PA
 40.93°N 75.08°W (Elev. 299 ft)
6:09 pm EST Dec 7, 2025
7pm EST Dec 7, 2025-6pm EST Dec 14, 2025
 
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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