Severe weather and flash flooding will be possible again on Thursday

Severe weather will be possible Thursday from the southern Plains to the southern Appalachians. Damaging winds and large hail are the primary threats. In addition, heavy rainfall could lead to flash flooding across portions of the Tennessee and Ohio Valleys. Read More >

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Thunderstorm Light Rain

69°F

21°C

Humidity 93%
Wind Speed S 5 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 67°F (19°C)
Visibility 9.00 mi
Last update 1 Jul 7:56 pm EDT
Extended Forecast for

Port Jefferson NY

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm. Some storms could be severe, with damaging winds and heavy rain.  Cloudy, then gradually becoming partly cloudy, with a low around 65. South wind 6 to 11 mph becoming west after midnight.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Severe
    Thunderstorms

    Low: 65 °F

  • Saturday

    Saturday: Sunny, with a high near 81. Northwest wind 9 to 15 mph.

    Sunny

    High: 81 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 62. West wind 6 to 11 mph becoming light  after midnight.

    Mostly Clear

    Low: 62 °F

  • Sunday

    Sunday: Sunny, with a high near 80. West wind 6 to 10 mph.

    Sunny

    High: 80 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 68. Southwest wind 6 to 10 mph.

    Partly Cloudy

    Low: 68 °F

  • Independence
    Day

    Independence Day: Mostly sunny, with a high near 82.

    Mostly Sunny

    High: 82 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 69.

    Mostly Cloudy

    Low: 69 °F

  • Tuesday

    Tuesday: Partly sunny, with a high near 81.

    Partly Sunny

    High: 81 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 69.

    Partly Cloudy

    Low: 69 °F

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before 11pm. Some storms could be severe, with damaging winds and heavy rain. Cloudy, then gradually becoming partly cloudy, with a low around 65. South wind 6 to 11 mph becoming west after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Sunny, with a high near 81. Northwest wind 9 to 15 mph.
Saturday Night
Mostly clear, with a low around 62. West wind 6 to 11 mph becoming light after midnight.
Sunday
Sunny, with a high near 80. West wind 6 to 10 mph.
Sunday Night
Partly cloudy, with a low around 68. Southwest wind 6 to 10 mph.
Independence Day
Mostly sunny, with a high near 82.
Monday Night
Mostly cloudy, with a low around 69.
Tuesday
Partly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 70.
Friday
Sunny, with a high near 83.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
6:01 pm EDT Jul 1, 2016
8pm EDT Jul 1, 2016-6pm EDT Jul 8, 2016
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database