Heavy Lake Effect Snow and Bitterly Cold Temperatures

A bitterly cold airmass will settle over much of the central and eastern U.S over the next several days. Well below normal temperatures and cold wind chills will be common. In addition, heavy lake effect snow will be possible especially downwind of Lakes Erie and Ontario, where up to one foot of additional snow is forecast by Sunday morning.
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Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.92°NLon: -73.12°WElev: 98ft.

A Few Clouds and Breezy

6°F

-14°C

Humidity 38%
Wind Speed NW 23 G 36 mph
Barometer 30.25 in (1024.5 mb)
Dewpoint -14°F (-26°C)
Visibility 10.00 mi
Wind Chill-15°F (-26°C)
Last update 13 Feb 7:56 pm EST
Extended Forecast for

Stony Brook NY

Wind Chill Advisory until February 14, 12:00pm
Click here for hazard details and duration
Wind Chill Advisory
  •  
    Wind Chill Advisory until February 14, 12:00pm

    NOW until
    12:00pm Sun

    Wind Chill Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 1. Wind chill values between -15 and -20. Blustery, with a northwest wind 18 to 23 mph, with gusts as high as 39 mph.

    Mostly Clear
    and Blustery

    Low: 1 °F

  • Sunday

    Sunday: Sunny and cold, with a high near 15. Wind chill values between -10 and -20. Northwest wind 11 to 17 mph, with gusts as high as 29 mph.

    Cold

    High: 15 °F

  • Sunday
    Night

    Sunday Night: Increasing clouds, with a low around 7. Northwest wind 5 to 7 mph becoming calm  in the evening.

    Increasing
    Clouds

    Low: 7 °F

  • Washington's
    Birthday

    Washington's Birthday: Snow likely, mainly after 3pm.  Mostly cloudy, with a high near 37. Wind chill values between zero and 10. Light south wind becoming southeast 5 to 9 mph in the morning.  Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Chance Snow
    then Snow
    Likely

    High: 37 °F

  • Monday
    Night

    Monday Night: Snow likely before 8pm, then rain.  Temperature rising to around 47 by 5am. Southeast wind 10 to 18 mph becoming south after midnight.  Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Rain/Snow
    Likely then
    Rain

    Low: 33 °F

  • Tuesday

    Tuesday: Rain. The rain could be heavy at times.  Temperature rising to near 48 by 9am, then falling to around 44 during the remainder of the day. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Heavy Rain

    High: 48 °F

  • Tuesday
    Night

    Tuesday Night: A chance of rain showers before 1am, then a chance of rain and snow showers.  Mostly cloudy, with a low around 32. Chance of precipitation is 40%.

    Chance
    Showers then
    Chance
    Rain/Snow

    Low: 32 °F

  • Wednesday

    Wednesday: A chance of snow showers before 8am, then a chance of rain and snow showers between 8am and 10am, then a chance of rain showers after 10am.  Partly sunny, with a high near 43. Chance of precipitation is 30%.

    Chance
    Rain/Snow
    then Chance
    Showers

    High: 43 °F

Detailed Forecast

Tonight
Mostly clear, with a low around 1. Wind chill values between -15 and -20. Blustery, with a northwest wind 18 to 23 mph, with gusts as high as 39 mph.
Sunday
Sunny and cold, with a high near 15. Wind chill values between -10 and -20. Northwest wind 11 to 17 mph, with gusts as high as 29 mph.
Sunday Night
Increasing clouds, with a low around 7. Northwest wind 5 to 7 mph becoming calm in the evening.
Washington's Birthday
Snow likely, mainly after 3pm. Mostly cloudy, with a high near 37. Wind chill values between zero and 10. Light south wind becoming southeast 5 to 9 mph in the morning. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday Night
Snow likely before 8pm, then rain. Temperature rising to around 47 by 5am. Southeast wind 10 to 18 mph becoming south after midnight. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Tuesday
Rain. The rain could be heavy at times. Temperature rising to near 48 by 9am, then falling to around 44 during the remainder of the day. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday Night
A chance of rain showers before 1am, then a chance of rain and snow showers. Mostly cloudy, with a low around 32. Chance of precipitation is 40%.
Wednesday
A chance of snow showers before 8am, then a chance of rain and snow showers between 8am and 10am, then a chance of rain showers after 10am. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 26.
Thursday
Mostly sunny, with a high near 33.
Thursday Night
Mostly clear, with a low around 22.
Friday
Mostly sunny, with a high near 38.
Friday Night
Mostly cloudy, with a low around 32.
Saturday
A chance of showers. Mostly cloudy, with a high near 49. Chance of precipitation is 30%.
Click Map For Forecast
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 ft)
7:00 pm EST Feb 13, 2016
8pm EST Feb 13, 2016-6pm EST Feb 20, 2016
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database