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

Wintry precipitation and very cold temperatures in the east, unsettled weather likely from northern California to the Pacific Northwest

Accumulating snowfall will bring travel implications from the southeast U.S. to the Middle Atlantic, Northeast, and New England through Wednesday. Very cold temperatures will likely bring a hard freeze to portions of the Deep South into Thursday. A series of storm systems will bring the potential for heavy rain, strong winds, and mountain snowfall from northern California to the Pacific Northwest. Read More >

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain Fog/Mist

40°F

4°C

Humidity 97%
Wind Speed E 6 mph
Barometer 30.25 in (1024.4 mb)
Dewpoint 39°F (4°C)
Visibility 5.00 mi
Wind Chill36°F (2°C)
Last update 17 Jan 3:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Overnight

    Overnight: Snow, possibly mixed with rain.  Low around 33. Northeast wind around 7 mph.  Chance of precipitation is 80%. Little or no snow accumulation expected.

    Rain/Snow

    Low: 33 °F

  • Wednesday

    Wednesday: Rain and snow before noon, then a chance of snow between noon and 4pm.  Temperature falling to around 32 by 5pm. Wind chill values between 25 and 30. Northeast wind 7 to 13 mph becoming northwest in the afternoon.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    Rain/Snow
    then Chance
    Snow

    High: 37 °F

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 20. Wind chill values between 10 and 15. Northwest wind 9 to 14 mph.

    Decreasing
    Clouds

    Low: 20 °F

  • Thursday

    Thursday: Sunny, with a high near 34. Wind chill values between 10 and 20. West wind 7 to 15 mph.

    Sunny

    High: 34 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 21. Northwest wind 8 to 11 mph.

    Mostly Clear

    Low: 21 °F

  • Friday

    Friday: Mostly sunny, with a high near 39.

    Mostly Sunny

    High: 39 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 27.

    Mostly Clear

    Low: 27 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 44.

    Mostly Sunny

    High: 44 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 30.

    Partly Cloudy

    Low: 30 °F

Detailed Forecast

Overnight
Snow, possibly mixed with rain. Low around 33. Northeast wind around 7 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday
Rain and snow before noon, then a chance of snow between noon and 4pm. Temperature falling to around 32 by 5pm. Wind chill values between 25 and 30. Northeast wind 7 to 13 mph becoming northwest in the afternoon. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 20. Wind chill values between 10 and 15. Northwest wind 9 to 14 mph.
Thursday
Sunny, with a high near 34. Wind chill values between 10 and 20. West wind 7 to 15 mph.
Thursday Night
Mostly clear, with a low around 21. Northwest wind 8 to 11 mph.
Friday
Mostly sunny, with a high near 39.
Friday Night
Mostly clear, with a low around 27.
Saturday
Mostly sunny, with a high near 44.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Mostly sunny, with a high near 43.
Sunday Night
Partly cloudy, with a low around 34.
Monday
A 30 percent chance of light rain. Mostly cloudy, with a high near 43.
Monday Night
Rain likely. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Tuesday
Rain likely. Mostly cloudy, with a high near 48. Chance of precipitation is 70%.
Click Map For Forecast
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
3:42 am EST Jan 17, 2018
4am EST Jan 17, 2018-6pm EST Jan 23, 2018
 
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