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

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

Allentown, Lehigh Valley International Airport (KABE)

Lat: 40.65°NLon: 75.45°WElev: 384ft.

Overcast

37°F

3°C

Humidity 59%
Wind Speed W 9 mph
Barometer 30.04 in (1017.6 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 7 Dec 2:51 pm EST
Extended Forecast for

5 Miles NNW Chapman PA

  • Tonight

    Tonight: Partly cloudy, with a low around 19. Southwest wind 5 to 15 mph becoming northwest after midnight.

    Low: 19 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 27. North wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 27 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 7. North wind around 5 mph becoming calm in the evening.

    Low: 7 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 28. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 28 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A slight chance of snow after 1am. Mostly cloudy, with a low around 23. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 23 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 1pm, then a chance of rain. Cloudy, with a high near 40. Chance of precipitation is 50%.

    High: 40 °F

    Chance
    Rain/Snow

  • 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 38.

    High: 38 °F

    Partly Sunny

  • Thursday Night

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

    Low: 24 °F

    Chance Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 19. Southwest wind 5 to 15 mph becoming northwest after midnight.
Monday
Mostly sunny, with a high near 27. North wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 7. North wind around 5 mph becoming calm in the evening.
Tuesday
Increasing clouds, with a high near 28. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Tuesday Night
A slight chance of snow after 1am. Mostly cloudy, with a low around 23. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday
A chance of rain and snow before 1pm, then a chance of rain. Cloudy, with a high near 40. Chance of precipitation is 50%.
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 38.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Friday
A chance of snow. Mostly cloudy, with a high near 35. Chance of precipitation is 40%.
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 27.
Saturday Night
Mostly cloudy, with a low around 15.
Sunday
Partly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Chapman PA
 40.83°N 75.43°W (Elev. 915 ft)
Last Update:
6:32 am EST Dec 7, 2025
Forecast Valid:
3pm EST Dec 7, 2025-6pm EST Dec 14, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation