Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Fire Weather Threats out West; Wintry Weather Upper Midwest to the Middle Atlantic

High pressure in the west continues to send weather systems into the Great Basin, and this is keeping fire weather threats elevated to critical across southern California. A series of weather systems will bring widespread snow from the Upper Midwest to the Middle Atlantic and Northeast, with heavier snow amounts in lake effect snow bands near the Great Lakes. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Snow Fog/Mist

24°F

-4°C

Humidity 88%
Wind Speed Calm
Barometer 29.63 in (1003.3 mb)
Dewpoint 21°F (-6°C)
Visibility 1.75 mi
Last update 14 Dec 1:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Winter Weather Advisory December 14, 03:00am until December 14, 10:00am
Click here for hazard details and duration
Winter Weather Advisory
  • Overnight

    Overnight: Snow likely.  Cloudy, with a low around 26. Wind chill values between 20 and 25. West wind around 8 mph.  Chance of precipitation is 70%. Total nighttime snow accumulation of 1 to 2 inches possible.

    Snow Likely

    Low: 26 °F

  • Thursday

    Thursday: Snow, mainly before 10am.  High near 34. Wind chill values between 20 and 25. Northwest wind 6 to 13 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Snow then
    Chance Snow

    High: 34 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 18. Northwest wind 7 to 13 mph.

    Mostly Clear

    Low: 18 °F

  • Friday

    Friday: Partly sunny, with a high near 32. Wind chill values between 15 and 25. Northwest wind around 5 mph becoming calm.

    Partly Sunny

    High: 32 °F

  • Friday
    Night

    Friday Night: A 20 percent chance of snow before 4am.  Mostly cloudy, with a steady temperature around 30. Light west wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 21 mph.

    Slight Chance
    Snow

    Low: 30 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 37. Breezy.

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

    High: 37 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 25.

    Mostly Clear

    Low: 25 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 40.

    Mostly Sunny

    High: 40 °F

  • Sunday
    Night

    Sunday Night: A chance of rain and snow before midnight, then a chance of rain between midnight and 3am.  Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

    Chance
    Rain/Snow
    then Chance
    Rain

    Low: 33 °F

Detailed Forecast

Overnight
Snow likely. Cloudy, with a low around 26. Wind chill values between 20 and 25. West wind around 8 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of 1 to 2 inches possible.
Thursday
Snow, mainly before 10am. High near 34. Wind chill values between 20 and 25. Northwest wind 6 to 13 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
Mostly clear, with a low around 18. Northwest wind 7 to 13 mph.
Friday
Partly sunny, with a high near 32. Wind chill values between 15 and 25. Northwest wind around 5 mph becoming calm.
Friday Night
A 20 percent chance of snow before 4am. Mostly cloudy, with a steady temperature around 30. Light west wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 21 mph.
Saturday
Mostly sunny, with a high near 37. Breezy.
Saturday Night
Mostly clear, with a low around 25.
Sunday
Mostly sunny, with a high near 40.
Sunday Night
A chance of rain and snow before midnight, then a chance of rain between midnight and 3am. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 47.
Monday Night
Mostly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 46.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly sunny, with a high near 41. Breezy.
Click Map For Forecast
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
12:52 am EST Dec 14, 2017
2am EST Dec 14, 2017-6pm EST Dec 20, 2017
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database