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Active Weather From the Upper Midwest to the East Coast

A strong cold front will impact the entire east coast this weekend with much cooler temperatures and gusty winds. Heavy snow and strong winds in the Upper Midwest will transition into the Northeast this weekend, and severe weather in the Ohio Valley will move into the Mid-Atlantic as a marginal risk. Out west, a cold weather system will bring more rain, and some areas of low elevation snow. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog

52°F

11°C

Humidity 100%
Wind Speed S 7 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 52°F (11°C)
Visibility 0.25 mi
Wind Chill50°F (10°C)
Last update 25 Feb 12:56 am EST
Extended Forecast for

Holtsville NY

Dense Fog Advisory until February 25, 11:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until February 25, 11:00am

    NOW until
    11:00am Sat

    Dense Fog Advisory

  • Overnight

    Overnight: Areas of drizzle. The drizzle could be heavy at times.  Areas of dense fog.  Otherwise, cloudy, with a low around 50. South wind 3 to 6 mph.

    Areas Drizzle
    and Areas
    Dense Fog

    Low: 50 °F

  • Saturday

    Saturday: Areas of drizzle before noon, then a slight chance of showers after 4pm. The drizzle could be heavy at times.  Areas of dense fog before noon.  Otherwise, mostly cloudy, with a high near 62. Southeast wind 5 to 10 mph.  Chance of precipitation is 20%.

    Areas Drizzle
    and Areas
    Dense Fog

    High: 62 °F

  • Saturday
    Night

    Saturday Night: Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 2am. Some of the storms could produce gusty winds.  Cloudy during the early evening, then gradual clearing, with a low around 36. Wind chill values between 30 and 35. South wind 8 to 18 mph becoming northwest after midnight. Winds could gust as high as 30 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Showers
    Likely then
    Slight Chance
    Showers

    Low: 36 °F

  • Sunday

    Sunday: Sunny, with a high near 44. Wind chill values between 25 and 35. West wind 16 to 18 mph, with gusts as high as 28 mph.

    Sunny

    High: 44 °F

  • Sunday
    Night

    Sunday Night: Mostly clear, with a low around 32. Southwest wind 6 to 11 mph.

    Mostly Clear

    Low: 32 °F

  • Monday

    Monday: Partly sunny, with a high near 49.

    Partly Sunny

    High: 49 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 38.

    Mostly Cloudy

    Low: 38 °F

  • Tuesday

    Tuesday: A 50 percent chance of showers.  Mostly cloudy, with a high near 51.

    Chance
    Showers

    High: 51 °F

Detailed Forecast

Overnight
Areas of drizzle. The drizzle could be heavy at times. Areas of dense fog. Otherwise, cloudy, with a low around 50. South wind 3 to 6 mph.
Saturday
Areas of drizzle before noon, then a slight chance of showers after 4pm. The drizzle could be heavy at times. Areas of dense fog before noon. Otherwise, mostly cloudy, with a high near 62. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday Night
Showers and thunderstorms likely before midnight, then a slight chance of showers between midnight and 2am. Some of the storms could produce gusty winds. Cloudy during the early evening, then gradual clearing, with a low around 36. Wind chill values between 30 and 35. South wind 8 to 18 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Sunny, with a high near 44. Wind chill values between 25 and 35. West wind 16 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 32. Southwest wind 6 to 11 mph.
Monday
Partly sunny, with a high near 49.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
A 50 percent chance of showers. Mostly cloudy, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
A 50 percent chance of showers. Cloudy, with a high near 53.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 39.
Thursday
Mostly sunny, with a high near 47.
Thursday Night
Mostly clear, with a low around 30.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 42.
Click Map For Forecast
Point Forecast:
Holtsville NY
 40.82°N 73.05°W (Elev. 112 ft)
12:17 am EST Feb 25, 2017
1am EST Feb 25, 2017-6pm EST Mar 3, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database