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A stormy Friday expected for parts of the central and southern U.S.

Heavy rain, flash flooding and thunderstorms are expected on Friday, from the Southern Plains to the Tennessee Valley. Some of the storms may become severe in the afternoon and evening, especially in the ArkLaTex region and parts of the Lower Mississippi Valley. Primary hazards will be isolated damaging winds gusts and hail. The Central High Plains and the Carolinas could also see strong storms.
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Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

77°F

25°C

Humidity 42%
Wind Speed NW 9 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 3 Jul 12:56 pm EDT
Extended Forecast for

Port Jefferson NY

  • This
    Afternoon

    Sunny

    Sunny

    High: 78 °F

  • Tonight

    Partly Cloudy

    Partly
    Cloudy

    Low: 64 °F

  • Independence
    Day

    Rain Likely Chance for Measurable Precipitation 60%

    Rain
    Likely

    High: 73 °F

  • Saturday
    Night

    Chance Rain Chance for Measurable Precipitation 30%

    Chance
    Rain

    Low: 60 °F

  • Sunday

    Sunny

    Sunny

    High: 80 °F

  • Sunday
    Night

    Mostly Clear

    Mostly
    Clear

    Low: 66 °F

  • Monday

    Mostly Sunny

    Mostly
    Sunny

    High: 81 °F

  • Monday
    Night

    Mostly Cloudy

    Mostly
    Cloudy

    Low: 67 °F

  • Tuesday

    Partly Sunny

    Partly
    Sunny

    High: 80 °F

Detailed Forecast

This Afternoon
Sunny, with a high near 78. Southwest wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around 64. South wind around 6 mph becoming light and variable in the evening.
Independence Day
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 73. East wind 7 to 13 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
A chance of rain before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 60. Northeast wind 7 to 13 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 80. Northwest wind 6 to 9 mph becoming southwest in the afternoon.
Sunday Night
Mostly clear, with a low around 66.
Monday
Mostly sunny, with a high near 81.
Monday Night
Mostly cloudy, with a low around 67.
Tuesday
Partly sunny, with a high near 80.
Tuesday Night
Mostly cloudy, with a low around 68.
Wednesday
Partly sunny, with a high near 81.
Wednesday Night
Mostly cloudy, with a low around 69.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 30%.
  Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
12:53 pm EDT Jul 3, 2015
2pm EDT Jul 3, 2015-6pm EDT Jul 9, 2015
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database