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

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Fair

30°F

-1°C

Humidity 79%
Wind Speed Calm
Barometer 30.00 in (1015.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 7 Dec 5:56 pm EST
Extended Forecast for

Dennis MA

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Southwest wind 5 to 10 mph becoming northwest 13 to 18 mph after midnight.

    Low: 24 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 32. Breezy, with a north wind 16 to 23 mph.

    High: 32 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 16. North wind 8 to 13 mph.

    Low: 16 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 43. Northwest wind 6 to 10 mph becoming southwest in the afternoon.

    High: 43 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A slight chance of snow before 8pm, then a chance of rain.  Cloudy, with a low around 33. South wind 13 to 15 mph.  Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 33 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Wednesday

    Wednesday: A chance of rain, mainly after noon.  Mostly cloudy, with a high near 50. Southwest wind 13 to 17 mph.  Chance of precipitation is 40%.

    High: 50 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 4am.  Mostly cloudy, with a low around 37. Southwest wind around 16 mph, with gusts as high as 26 mph.  Chance of precipitation is 40%.

    Low: 37 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 44. West wind around 15 mph.

    High: 44 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 29. West wind 9 to 13 mph.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Southwest wind 5 to 10 mph becoming northwest 13 to 18 mph after midnight.
Monday
Mostly sunny, with a high near 32. Breezy, with a north wind 16 to 23 mph.
Monday Night
Mostly cloudy, with a low around 16. North wind 8 to 13 mph.
Tuesday
Increasing clouds, with a high near 43. Northwest wind 6 to 10 mph becoming southwest in the afternoon.
Tuesday Night
A slight chance of snow before 8pm, then a chance of rain. Cloudy, with a low around 33. South wind 13 to 15 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday
A chance of rain, mainly after noon. Mostly cloudy, with a high near 50. Southwest wind 13 to 17 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of rain before 4am. Mostly cloudy, with a low around 37. Southwest wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Thursday
Mostly sunny, with a high near 44. West wind around 15 mph.
Thursday Night
Mostly cloudy, with a low around 29. West wind 9 to 13 mph.
Friday
A chance of snow between 8am and 9am, then a chance of rain after 9am. Partly sunny, with a high near 38. West wind around 11 mph. Chance of precipitation is 40%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. West wind 10 to 13 mph. Chance of precipitation is 40%.
Saturday
A chance of rain and snow. Partly sunny, with a high near 38. Northwest wind 14 to 16 mph. Chance of precipitation is 40%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 24. West wind around 18 mph. Chance of precipitation is 40%.
Sunday
A chance of snow. Mostly sunny, with a high near 33. West wind around 18 mph. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Dennis MA
 41.74°N 70.21°W (Elev. 30 ft)
1:37 pm EST Dec 7, 2025
6pm 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