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

Clipper System Moving Across the Nation; Heavy Precipitation Across the Pacific Northwest

A clipper system moving through the Ohio Valley, Lower Great Lakes and central Appalachians will continue to produce snow and rain through Wednesday. Higher elevations of the central Appalachians could receive a few inches of snow. Meanwhile, excessive rainfall, flooding and high elevation snow will continue to impact the Pacific Northwest through mid-week. Read More >

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Overcast

30°F

-1°C

Humidity 88%
Wind Speed Calm
Barometer 29.99 in (1015.8 mb)
Dewpoint 27°F (-3°C)
Visibility 9.00 mi
Last update 6 Dec 4:53 am EST
Extended Forecast for

Northumberland PA

  • Overnight

    Overnight: A chance of light snow. Cloudy, with a low around 33. Calm wind. Chance of precipitation is 40%.

    Chance Light
    Snow

    Low: 33 °F

  • Wednesday

    Wednesday: A chance of rain and snow showers before 11am, then a slight chance of rain showers between 11am and 3pm. Mostly cloudy, with a high near 39. Light north wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Chance
    Rain/Snow
    then Slight
    Chance
    Showers

    High: 39 °F

  • Wednesday
    Night

    Wednesday Night: A slight chance of light snow after 4am. Mostly cloudy, with a low around 27. Northwest wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 20%.

    Mostly Cloudy
    then Slight
    Chance Light
    Snow

    Low: 27 °F

  • Thursday

    Thursday: A chance of snow before 11am, then a chance of rain and snow between 11am and noon, then a chance of rain after noon. Cloudy, with a high near 41. Southwest wind 5 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Chance
    Rain/Snow
    then Chance
    Light Rain

    High: 41 °F

  • Thursday
    Night

    Thursday Night: Mostly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.

    Mostly Cloudy

    Low: 29 °F

  • Friday

    Friday: Mostly sunny, with a high near 51.

    Mostly Sunny

    High: 51 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 33.

    Partly Cloudy

    Low: 33 °F

  • Saturday

    Saturday: Partly sunny, with a high near 54.

    Partly Sunny

    High: 54 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 38.

    Mostly Cloudy

    Low: 38 °F

Detailed Forecast

Overnight
A chance of light snow. Cloudy, with a low around 33. Calm wind. Chance of precipitation is 40%.
Wednesday
A chance of rain and snow showers before 11am, then a slight chance of rain showers between 11am and 3pm. Mostly cloudy, with a high near 39. Light north wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Wednesday Night
A slight chance of light snow after 4am. Mostly cloudy, with a low around 27. Northwest wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 20%.
Thursday
A chance of snow before 11am, then a chance of rain and snow between 11am and noon, then a chance of rain after noon. Cloudy, with a high near 41. Southwest wind 5 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly cloudy, with a low around 29. Southwest wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 51.
Friday Night
Partly cloudy, with a low around 33.
Saturday
Partly sunny, with a high near 54.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Rain, mainly after 1pm. High near 60. Breezy. Chance of precipitation is 80%.
Sunday Night
Rain. Low around 36. Breezy. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 44.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 46.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Northumberland PA
 40.89°N 76.79°W (Elev. 482 ft)
Last Update:
2:17 am EST Dec 6, 2023
Forecast Valid:
5am EST Dec 6, 2023-6pm EST Dec 12, 2023
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation