Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Fair

13°F

-11°C

Humidity 73%
Wind Speed Calm
Barometer 30.27 in
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 9 Dec 3:35 am EST
Extended Forecast for

Gwynedd PA

  • Overnight

    Overnight: Mostly clear, with a low around 13. Calm wind.

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 33. Calm wind becoming south around 5 mph in the afternoon.

    High: 33 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 26. Southwest wind around 5 mph.

    Low: 26 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow before 10am, then rain.  High near 43. South wind 10 to 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 43 °F

    Chance
    Rain/Snow
    then Rain

  • Wednesday Night

    Wednesday Night: A slight chance of rain before 10pm.  Mostly cloudy, with a low around 29. West wind 10 to 15 mph.  Chance of precipitation is 20%.

    Low: 29 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of snow.  Mostly cloudy, with a low around 25. Chance of precipitation is 40%.

    Low: 25 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 13. Calm wind.
Tuesday
Increasing clouds, with a high near 33. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 26. Southwest wind around 5 mph.
Wednesday
A chance of rain and snow before 10am, then rain. High near 43. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday Night
A slight chance of rain before 10pm. Mostly cloudy, with a low around 29. West wind 10 to 15 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 37.
Friday Night
A chance of snow. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Saturday
Mostly cloudy, with a high near 38.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 32.
Sunday Night
Mostly clear, with a low around 14.
Monday
Mostly sunny, with a high near 28.
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ABOUT THIS FORECAST

 
Point Forecast:
Gwynedd PA
 40.19°N 75.26°W (Elev. 295 ft)
2:26 am EST Dec 9, 2025
3am EST Dec 9, 2025-6pm EST Dec 15, 2025
 
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Additional Resources

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