Winter Storm Shifting From the Central U.S. to the Northeast; Severe Thunderstorms in the South

A winter storm will track to the Lower Mississippi River Valley by Monday and across the central Appalachians Monday night to southern New England by Tuesday. A swath of snow, sleet and freezing rain will spread from the Central Plains east into southern New England by Monday and Tuesday. Severe thunderstorms with damaging winds and tornadoes are possible over the northern Gulf Coast on Monday. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

0°C

32°F

Humidity 59%
Wind Speed NW 9 km/h
Barometer 1022.9 mb (30.21 in)
Dewpoint -7°C (19°F)
Visibility 16 km
Wind Chill-3°C (26°F)
Last update 16 Dec 2:56 am EST
Extended Forecast for

Islandia NY

  • Overnight

    Overnight: Mostly cloudy, with a low around -2. Northwest wind 16 to 18 km/h.

    Mostly Cloudy

    Low: -2 °C

  • Monday

    Monday: Cloudy, with a high near 2. Northwest wind 5 to 13 km/h.

    Cloudy

    High: 2 °C

  • Monday
    Night

    Monday Night: Rain, snow, and sleet likely before 10pm, then rain likely between 10pm and 11pm, then rain and sleet after 11pm.  Low around 0. East wind 5 to 10 km/h increasing to 16 to 21 km/h after midnight.  Chance of precipitation is 90%. New snow and sleet accumulation of 1 to 2 centimeters possible.

    Wintry Mix
    Likely then
    Rain/Sleet

    Low: 0 °C

  • Tuesday

    Tuesday: Rain.  High near 4. Wind chill values between -5 and zero. Northeast wind 14 to 23 km/h.  Chance of precipitation is 100%. New precipitation amounts between 1 and 2 cm possible.

    Rain

    High: 4 °C

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of rain before 8pm.  Cloudy during the early evening, then gradual clearing, with a low around -2. North wind 21 to 24 km/h.

    Chance Rain
    then Partly
    Cloudy

    Low: -2 °C

  • Wednesday

    Wednesday: Increasing clouds, with a high near 3.

    Increasing
    Clouds

    High: 3 °C

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -9. Blustery.

    Decreasing
    Clouds and
    Blustery

    Low: -9 °C

  • Thursday

    Thursday: Sunny, with a high near -2. Blustery.

    Sunny and
    Blustery then
    Sunny

    High: -2 °C

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around -8.

    Mostly Clear

    Low: -8 °C

Detailed Forecast

Overnight
Mostly cloudy, with a low around -2. Northwest wind 16 to 18 km/h.
Monday
Cloudy, with a high near 2. Northwest wind 5 to 13 km/h.
Monday Night
Rain, snow, and sleet likely before 10pm, then rain likely between 10pm and 11pm, then rain and sleet after 11pm. Low around 0. East wind 5 to 10 km/h increasing to 16 to 21 km/h after midnight. Chance of precipitation is 90%. New snow and sleet accumulation of 1 to 2 centimeters possible.
Tuesday
Rain. High near 4. Wind chill values between -5 and zero. Northeast wind 14 to 23 km/h. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 cm possible.
Tuesday Night
A 30 percent chance of rain before 8pm. Cloudy during the early evening, then gradual clearing, with a low around -2. North wind 21 to 24 km/h.
Wednesday
Increasing clouds, with a high near 3.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around -9. Blustery.
Thursday
Sunny, with a high near -2. Blustery.
Thursday Night
Mostly clear, with a low around -8.
Friday
Sunny, with a high near 0.
Friday Night
Partly cloudy, with a low around -5.
Saturday
Mostly cloudy, with a high near 4.
Saturday Night
Mostly cloudy, with a low around -1.
Sunday
Partly sunny, with a high near 6.
Click Map For Forecast
Point Forecast:
Islandia NY
 40.81°N 73.17°W (Elev. 49 m)
3:26 am EST Dec 16, 2019
3am EST Dec 16, 2019-6pm EST Dec 22, 2019
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database