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Storm system to bring potential for heavy rainfall, flooding, and severe thunderstorms

A slow moving low pressure system will bring the threat for heavy rainfall, flash flooding, and severe thunderstorms Sunday into Monday. The main threat areas include the Mid South, Southeast U.S, and the southern Mid Atlantic. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

58°F

14°C

Humidity 51%
Wind Speed S 12 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 23 Apr 1:56 pm EDT
Extended Forecast for

Port Jefferson NY

  • This
    Afternoon

    This Afternoon: Sunny, with a high near 63. Light and variable wind becoming east around 5 mph.

    Sunny

    High: 63 °F

  • Tonight

    Tonight: Mostly clear, with a low around 46. South wind 5 to 7 mph becoming calm  after midnight.

    Mostly Clear

    Low: 46 °F

  • Monday

    Monday: Increasing clouds, with a high near 57. East wind 5 to 10 mph.

    Increasing
    Clouds

    High: 57 °F

  • Monday
    Night

    Monday Night: A 50 percent chance of light rain, mainly after 9pm.  Cloudy, with a low around 47. East wind 9 to 17 mph.

    Chance Light
    Rain

    Low: 47 °F

  • Tuesday

    Tuesday: Rain.  High near 54. Breezy, with an east wind 17 to 20 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Rain and
    Breezy

    High: 54 °F

  • Tuesday
    Night

    Tuesday Night: Rain.  Low around 50. Breezy.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Rain and
    Breezy

    Low: 50 °F

  • Wednesday

    Wednesday: A 40 percent chance of rain.  Mostly cloudy, with a high near 63.

    Chance Rain

    High: 63 °F

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, with a low around 53.

    Mostly Cloudy

    Low: 53 °F

  • Thursday

    Thursday: Partly sunny, with a high near 69.

    Partly Sunny

    High: 69 °F

Detailed Forecast

This Afternoon
Sunny, with a high near 63. Light and variable wind becoming east around 5 mph.
Tonight
Mostly clear, with a low around 46. South wind 5 to 7 mph becoming calm after midnight.
Monday
Increasing clouds, with a high near 57. East wind 5 to 10 mph.
Monday Night
A 50 percent chance of light rain, mainly after 9pm. Cloudy, with a low around 47. East wind 9 to 17 mph.
Tuesday
Rain. High near 54. Breezy, with an east wind 17 to 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain. Low around 50. Breezy. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 63.
Wednesday Night
Mostly cloudy, with a low around 53.
Thursday
Partly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 55.
Friday
Partly sunny, with a high near 69.
Friday Night
Mostly cloudy, with a low around 54.
Saturday
Partly sunny, with a high near 69.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
1:34 pm EDT Apr 23, 2017
2pm EDT Apr 23, 2017-6pm EDT Apr 29, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database