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A Major Severe Weather Outbreak is Forecast Today and/or Tonight

A severe thunderstorm and tornado outbreak is expected today across north Florida and south Georgia, with the significant severe threat also expected to extend southward into central Florida and northeastward into South Carolina this evening. A few long-track, strong tornadoes will be possible. In the west, more heavy rain and mountain snow will occur into the early part of this week. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog/Mist

48°F

9°C

Humidity 93%
Wind Speed SE 7 mph
Barometer 29.74 in (1007.1 mb)
Dewpoint 46°F (8°C)
Visibility 6.00 mi
Wind Chill45°F (7°C)
Last update 22 Jan 10:56 am EST
Extended Forecast for

Holtsville NY

Coastal Flood Watch January 23, 03:00pm until January 23, 10:00pm
Coastal Flood Advisory January 23, 04:00am until January 23, 08:00am
High Wind Warning January 23, 01:00am until January 24, 01:00am
Click here for hazard details and duration
Coastal Flood Watch
Coastal Flood Advisory
High Wind Warning
  • Today

    Today: A 30 percent chance of rain, mainly after 3pm.  Areas of fog before 2pm.  Otherwise, cloudy, with a steady temperature around 47. Northeast wind 10 to 15 mph.

    Chance Rain
    and Areas Fog

    High: 47 °F

  • Tonight

    Tonight: A 40 percent chance of rain.  Cloudy, with a low around 38. Windy, with a northeast wind 17 to 26 mph, with gusts as high as 44 mph.

    Chance Rain
    and Windy

    Low: 38 °F

  • Monday

    Monday: Rain, mainly after 10am. The rain could be heavy at times.  High near 42. Wind chill values between 25 and 30. Windy, with an east wind 33 to 37 mph, with gusts as high as 60 mph.  Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Heavy Rain
    and Windy

    High: 42 °F

  • Monday
    Night

    Monday Night: Rain.  Low around 40. Wind chill values between 25 and 35. Windy, with a northeast wind 32 to 37 mph decreasing to 20 to 25 mph after midnight. Winds could gust as high as 60 mph.  Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.

    Rain and
    Windy

    Low: 40 °F

  • Tuesday

    Tuesday: Rain, mainly before 10am.  High near 46. Northeast wind around 16 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Rain then
    Chance Rain

    High: 46 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Mostly Cloudy

    Low: 37 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48.

    Mostly Sunny

    High: 48 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 39.

    Partly Cloudy

    Low: 39 °F

  • Thursday

    Thursday: Mostly sunny, with a high near 46.

    Mostly Sunny

    High: 46 °F

Detailed Forecast

Today
A 30 percent chance of rain, mainly after 3pm. Areas of fog before 2pm. Otherwise, cloudy, with a steady temperature around 47. Northeast wind 10 to 15 mph.
Tonight
A 40 percent chance of rain. Cloudy, with a low around 38. Windy, with a northeast wind 17 to 26 mph, with gusts as high as 44 mph.
Monday
Rain, mainly after 10am. The rain could be heavy at times. High near 42. Wind chill values between 25 and 30. Windy, with an east wind 33 to 37 mph, with gusts as high as 60 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Rain. Low around 40. Wind chill values between 25 and 35. Windy, with a northeast wind 32 to 37 mph decreasing to 20 to 25 mph after midnight. Winds could gust as high as 60 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Tuesday
Rain, mainly before 10am. High near 46. Northeast wind around 16 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 48.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Mostly sunny, with a high near 46.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 40.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
Mostly sunny, with a high near 37.
Click Map For Forecast
Point Forecast:
Holtsville NY
 40.82°N 73.05°W (Elev. 112 ft)
11:50 am EST Jan 22, 2017
11am EST Jan 22, 2017-6pm EST Jan 28, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database