Severe thunderstorms and heavy rain for portions of the southern U.S.

A storm system will produce scattered severe thunderstorms and locally heavy rain stretching from the Southern Plains to the Gulf Coast and lower Miss. Valley on Friday. Large hail, locally damaging winds and flash flooding will be the main threats. This activity will continue into Saturday.
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Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

47°F

8°C

Humidity 66%
Wind Speed E 7 mph
Barometer 30.07 in (1018.1 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 29 Apr 4:56 am EDT
Extended Forecast for

Port Jefferson NY

  • Overnight

    Overnight: A chance of light rain.  Cloudy, with a steady temperature around 46. East wind around 5 mph.  Chance of precipitation is 30%.

    Chance Light
    Rain

    Low: 46 °F

  • Friday

    Friday: A slight chance of light rain before 11am, then a slight chance of light rain after 5pm.  Cloudy, with a high near 55. East wind 11 to 13 mph.  Chance of precipitation is 20%.

    Slight Chance
    Light Rain
    then Cloudy

    High: 55 °F

  • Friday
    Night

    Friday Night: Rain likely, mainly between 10pm and 4am.  Cloudy, with a low around 43. East wind 6 to 9 mph becoming northeast after midnight.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Rain Likely

    Low: 43 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 59. Northeast wind 7 to 9 mph becoming southeast in the afternoon.

    Mostly Sunny

    High: 59 °F

  • Saturday
    Night

    Saturday Night: A slight chance of rain after 2am.  Increasing clouds, with a low around 45. Southeast wind 5 to 13 mph.  Chance of precipitation is 20%.

    Partly Cloudy
    then Slight
    Chance Rain

    Low: 45 °F

  • Sunday

    Sunday: Rain likely, mainly after noon.  Cloudy, with a high near 53. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Rain Likely

    High: 53 °F

  • Sunday
    Night

    Sunday Night: Rain likely.  Cloudy, with a low around 47. Chance of precipitation is 60%.

    Rain Likely

    Low: 47 °F

  • Monday

    Monday: A chance of rain.  Cloudy, with a high near 57. Chance of precipitation is 50%.

    Chance Rain

    High: 57 °F

  • Monday
    Night

    Monday Night: Cloudy, with a low around 47.

    Cloudy

    Low: 47 °F

Detailed Forecast

Overnight
A chance of light rain. Cloudy, with a steady temperature around 46. East wind around 5 mph. Chance of precipitation is 30%.
Friday
A slight chance of light rain before 11am, then a slight chance of light rain after 5pm. Cloudy, with a high near 55. East wind 11 to 13 mph. Chance of precipitation is 20%.
Friday Night
Rain likely, mainly between 10pm and 4am. Cloudy, with a low around 43. East wind 6 to 9 mph becoming northeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 59. Northeast wind 7 to 9 mph becoming southeast in the afternoon.
Saturday Night
A slight chance of rain after 2am. Increasing clouds, with a low around 45. Southeast wind 5 to 13 mph. Chance of precipitation is 20%.
Sunday
Rain likely, mainly after noon. Cloudy, with a high near 53. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain likely. Cloudy, with a low around 47. Chance of precipitation is 60%.
Monday
A chance of rain. Cloudy, with a high near 57. Chance of precipitation is 50%.
Monday Night
Cloudy, with a low around 47.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 48.
Wednesday
Partly sunny, with a high near 59.
Wednesday Night
Mostly cloudy, with a low around 48.
Thursday
A chance of showers. Mostly cloudy, with a high near 60. Chance of precipitation is 30%.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
3:38 am EDT Apr 29, 2016
5am EDT Apr 29, 2016-6pm EDT May 5, 2016
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database