Winter Storm in the Central Appalachians through the Northeast; Heavy Snow in the Great Basin and Rockies

A winter storm will impact the central Appalachians to the Northeast through the night. Accumulating snow is expected for interior New England and the northern Mid-Atlantic. Scattered showers and occasional thunderstorms will persist across Florida and the Southeast coast. Locally heavy mountain snow is expected in the Great Basin and Rockies over the next couple of days. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

37°F

3°C

Humidity 82%
Wind Speed NW 18 G 28 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 3 Dec 1:56 am EST
Extended Forecast for

Smithtown NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 32. Wind chill values between 25 and 30. Northwest wind around 14 mph, with gusts as high as 28 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 43. Wind chill values between 25 and 35. Northwest wind 5 to 9 mph.

    High: 43 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 29. Calm wind becoming west around 6 mph after midnight.

    Low: 29 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 41. Wind chill values between 20 and 30. West wind 7 to 15 mph, with gusts as high as 28 mph.

    High: 41 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 16. Northwest wind 5 to 15 mph, with gusts as high as 28 mph.

    Low: 16 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 31.

    High: 31 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 40 percent chance of light snow.  Mostly cloudy, with a low around 26.

    Low: 26 °F

    Chance Light
    Snow

  • Saturday

    Saturday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 32. Wind chill values between 25 and 30. Northwest wind around 14 mph, with gusts as high as 28 mph.
Wednesday
Sunny, with a high near 43. Wind chill values between 25 and 35. Northwest wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 29. Calm wind becoming west around 6 mph after midnight.
Thursday
Increasing clouds, with a high near 41. Wind chill values between 20 and 30. West wind 7 to 15 mph, with gusts as high as 28 mph.
Thursday Night
Mostly clear, with a low around 16. Northwest wind 5 to 15 mph, with gusts as high as 28 mph.
Friday
Increasing clouds, with a high near 31.
Friday Night
A 40 percent chance of light snow. Mostly cloudy, with a low around 26.
Saturday
Partly sunny, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 28.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Partly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Partly sunny, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
Smithtown NY
 40.86°N 73.19°W (Elev. 98 ft)
2:32 am EST Dec 3, 2025
2am EST Dec 3, 2025-6pm EST Dec 9, 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