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Heavy Rain Possible in the Southeast, while Severe Weather Expected in the Great Plains

Slow-moving convection will bring the threat of flash flooding today in the Southeast. Meanwhile, strong to severe thunderstorms are expected across the Great Plains and upper Mississippi River Valley this afternoon and evening. Primary threats will be thunderstorms with damaging winds, large hail, and locally heavy rain. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

73°F

23°C

Humidity 34%
Wind Speed SW 10 mph
Barometer 30.08 in (1018.5 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 24 May 6:56 pm EDT
Extended Forecast for

Port Jefferson NY

  • Tonight

    Tonight: Clear, with a low around 60. Southwest wind 3 to 7 mph.

    Clear

    Low: 60 °F

  • Friday

    Friday: Sunny, with a high near 87. Southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon.

    Sunny

    High: 87 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 65. Southwest wind 9 to 13 mph.

    Mostly Clear

    Low: 65 °F

  • Saturday

    Saturday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 81. South wind 8 to 10 mph.

    Patchy Fog
    then Partly
    Sunny

    High: 81 °F

  • Saturday
    Night

    Saturday Night: A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 2am, then showers likely after 2am.  Patchy fog after 2am.  Otherwise, mostly cloudy, with a low around 63. Southwest wind 5 to 8 mph becoming southeast after midnight.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Showers
    Likely and
    Patchy Fog

    Low: 63 °F

  • Sunday

    Sunday: Showers likely before noon.  Patchy fog before noon.  Otherwise, cloudy, with a high near 66. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Showers
    Likely and
    Patchy Fog
    then Cloudy

    High: 66 °F

  • Sunday
    Night

    Sunday Night: Cloudy, with a low around 57.

    Cloudy

    Low: 57 °F

  • Memorial
    Day

    Memorial Day: Cloudy, with a high near 65.

    Cloudy

    High: 65 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 59.

    Mostly Cloudy

    Low: 59 °F

Detailed Forecast

Tonight
Clear, with a low around 60. Southwest wind 3 to 7 mph.
Friday
Sunny, with a high near 87. Southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon.
Friday Night
Mostly clear, with a low around 65. Southwest wind 9 to 13 mph.
Saturday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 81. South wind 8 to 10 mph.
Saturday Night
A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 2am, then showers likely after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 63. Southwest wind 5 to 8 mph becoming southeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers likely before noon. Patchy fog before noon. Otherwise, cloudy, with a high near 66. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Cloudy, with a low around 57.
Memorial Day
Cloudy, with a high near 65.
Monday Night
Mostly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Mostly sunny, with a high near 74.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
4:51 pm EDT May 24, 2018
7pm EDT May 24, 2018-6pm EDT May 31, 2018
 
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Additional Resources

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Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

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