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Severe Storms Shift into the Lower Mississippi Valley and Lower Ohio Valley Monday

The focus for severe storms will shift to the Lower Mississippi Valley and portions of the Tennessee Valley and Ohio Valley Monday. Damaging winds, hail and an isolated tornado or two will all be possible. Elsewhere, a wintry mix will impact portions of New England while heavy rain and high elevation snow continue in the northwest U.S. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog/Mist

44°F

7°C

Humidity 100%
Wind Speed N 3 mph
Barometer 30.00 in (1016.0 mb)
Dewpoint 44°F (7°C)
Visibility 4.00 mi
Last update 27 Mar 8:56 pm EDT
Extended Forecast for

Holtsville NY

Dense Fog Advisory March 28, 12:00am until March 28, 12:00pm
Click here for hazard details and duration
Dense Fog Advisory
  • Tonight

    Tonight: A 30 percent chance of light rain after 2am.  Patchy dense fog after 10pm.  Otherwise, mostly cloudy, with a low around 41. Calm wind.

    Patchy Fog
    then Chance
    Light Rain
    and Areas
    Dense Fog

    Low: 41 °F

  • Tuesday

    Tuesday: Rain, mainly before noon.  Areas of dense fog before noon. High near 49. East wind 5 to 8 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Rain and
    Areas Dense
    Fog then
    Chance Rain

    High: 49 °F

  • Tuesday
    Night

    Tuesday Night: Rain likely, mainly before 2am.  Areas of fog.  Otherwise, cloudy, with a low around 41. Northeast wind around 7 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Rain Likely
    and Areas Fog

    Low: 41 °F

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 59. North wind 10 to 14 mph.

    Decreasing
    Clouds

    High: 59 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 33. North wind around 13 mph.

    Mostly Clear

    Low: 33 °F

  • Thursday

    Thursday: Sunny, with a high near 51.

    Sunny

    High: 51 °F

  • Thursday
    Night

    Thursday Night: Increasing clouds, with a low around 36.

    Increasing
    Clouds

    Low: 36 °F

  • Friday

    Friday: Rain likely, mainly after 1pm.  Cloudy, with a high near 46. Chance of precipitation is 60%.

    Rain Likely

    High: 46 °F

  • Friday
    Night

    Friday Night: Rain likely.  Cloudy, with a low around 39. Chance of precipitation is 70%.

    Rain Likely

    Low: 39 °F

Detailed Forecast

Tonight
A 30 percent chance of light rain after 2am. Patchy dense fog after 10pm. Otherwise, mostly cloudy, with a low around 41. Calm wind.
Tuesday
Rain, mainly before noon. Areas of dense fog before noon. High near 49. East wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain likely, mainly before 2am. Areas of fog. Otherwise, cloudy, with a low around 41. Northeast wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 59. North wind 10 to 14 mph.
Wednesday Night
Mostly clear, with a low around 33. North wind around 13 mph.
Thursday
Sunny, with a high near 51.
Thursday Night
Increasing clouds, with a low around 36.
Friday
Rain likely, mainly after 1pm. Cloudy, with a high near 46. Chance of precipitation is 60%.
Friday Night
Rain likely. Cloudy, with a low around 39. Chance of precipitation is 70%.
Saturday
Rain likely, mainly before 1pm. Cloudy, with a high near 49. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 54.
Click Map For Forecast
Point Forecast:
Holtsville NY
 40.82°N 73.05°W (Elev. 112 ft)
7:34 pm EDT Mar 27, 2017
9pm EDT Mar 27, 2017-6pm EDT Apr 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