Vigorous System Impacting the Northwest; Large System To Affect East

A potent storm system is delivering heavy rainfall, strong winds, rough surf and beach erosion along the Pacific Northwest coast with mountain snow inland. Expect a couple more systems to arrive late week into the weekend. Meanwhile, another developing large scale system will deliver a heavy rain and renewed flood threat to much of the East late Wednesday through Friday, which may impact travel. Read More >

Hazardous Weather Conditions

Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Fair and Breezy

1°C

34°F

Humidity 38%
Wind Speed NW 33 G 50 km/h
Barometer 1009.0 mb (29.79 in)
Dewpoint -12°C (11°F)
Visibility 16 km
Wind Chill-6°C (22°F)
Last update 18 Dec 1:56 pm EST
Extended Forecast for

South Dennis MA

  • This
    Afternoon

    This Afternoon: Sunny, with a high near 0. Northwest wind 27 to 29 km/h, with gusts as high as 60 km/h.

    Sunny

    High: 0 °C

  • Tonight

    Tonight: Clear, with a low around -6. Northwest wind 14 to 24 km/h, with gusts as high as 55 km/h.

    Clear

    Low: -6 °C

  • Wednesday

    Wednesday: Sunny, with a high near 4. Northwest wind 8 to 11 km/h.

    Sunny

    High: 4 °C

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 1. West wind 8 to 11 km/h.

    Partly Cloudy

    Low: 1 °C

  • Thursday

    Thursday: Patchy fog before 9am.  Otherwise, sunny, with a high near 8. Southwest wind around 11 km/h.

    Patchy Fog
    then Mostly
    Sunny

    High: 8 °C

  • Thursday
    Night

    Thursday Night: Rain likely, mainly after 4am.  Patchy fog before 10pm.  Otherwise, mostly cloudy, with a low around 5. Southeast wind 5 to 10 km/h increasing to 11 to 16 km/h after midnight. Winds could gust as high as 32 km/h.  Chance of precipitation is 60%.

    Slight Chance
    Rain and
    Patchy Fog
    then Rain
    Likely

    Low: 5 °C

  • Friday

    Friday: Rain.  High near 12. Windy, with a south wind 27 to 37 km/h increasing to 40 to 50 km/h in the morning. Winds could gust as high as 85 km/h.  Chance of precipitation is 100%.

    Rain and
    Windy

    High: 12 °C

  • Friday
    Night

    Friday Night: Rain, mainly before 3am.  Low around 8. South wind 18 to 27 km/h.  Chance of precipitation is 80%.

    Rain

    Low: 8 °C

  • Saturday

    Saturday: A chance of rain before 10am.  Mostly cloudy, with a high near 10. West wind 21 to 24 km/h, with gusts as high as 40 km/h.  Chance of precipitation is 40%.

    Chance Rain
    then Partly
    Sunny

    High: 10 °C

Detailed Forecast

This Afternoon
Sunny, with a high near 0. Northwest wind 27 to 29 km/h, with gusts as high as 60 km/h.
Tonight
Clear, with a low around -6. Northwest wind 14 to 24 km/h, with gusts as high as 55 km/h.
Wednesday
Sunny, with a high near 4. Northwest wind 8 to 11 km/h.
Wednesday Night
Partly cloudy, with a low around 1. West wind 8 to 11 km/h.
Thursday
Patchy fog before 9am. Otherwise, sunny, with a high near 8. Southwest wind around 11 km/h.
Thursday Night
Rain likely, mainly after 4am. Patchy fog before 10pm. Otherwise, mostly cloudy, with a low around 5. Southeast wind 5 to 10 km/h increasing to 11 to 16 km/h after midnight. Winds could gust as high as 32 km/h. Chance of precipitation is 60%.
Friday
Rain. High near 12. Windy, with a south wind 27 to 37 km/h increasing to 40 to 50 km/h in the morning. Winds could gust as high as 85 km/h. Chance of precipitation is 100%.
Friday Night
Rain, mainly before 3am. Low around 8. South wind 18 to 27 km/h. Chance of precipitation is 80%.
Saturday
A chance of rain before 10am. Mostly cloudy, with a high near 10. West wind 21 to 24 km/h, with gusts as high as 40 km/h. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 1. West wind 24 to 27 km/h.
Sunday
Sunny, with a high near 6. West wind around 24 km/h.
Sunday Night
Partly cloudy, with a low around -1. West wind 13 to 18 km/h.
Monday
Mostly sunny, with a high near 4. West wind 11 to 14 km/h.
Click Map For Forecast
Point Forecast:
South Dennis MA
 41.71°N 70.16°W (Elev. 15 m)
7:14 am EST Dec 18, 2018
2pm EST Dec 18, 2018-6pm EST Dec 24, 2018
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database