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

A storm system will produce scattered severe thunderstorms and heavy rain in portions of lower-mid Mississippi River Valley and Gulf Coast region on Saturday. Very large hail, locally damaging winds, isolated tornadoes and flash flooding are possible in this area. Some of the flooding could be significant in portions of Louisiana, Mississippi and southeast Arkansas.
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Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

56°F

13°C

Humidity 53%
Wind Speed E 5 mph
Barometer 30.21 in (1022.9 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 30 Apr 9:56 am EDT
Extended Forecast for

Port Jefferson NY

  • Today

    Today: Mostly sunny, with a high near 57. East wind 3 to 7 mph.

    Mostly Sunny

    High: 57 °F

  • Tonight

    Tonight: Increasing clouds, with a low around 43. Southeast wind around 6 mph.

    Increasing
    Clouds

    Low: 43 °F

  • Sunday

    Sunday: Rain, mainly after 9am.  High near 50. East wind 8 to 13 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Rain

    High: 50 °F

  • Sunday
    Night

    Sunday Night: Rain, mainly before 3am.  Low around 47. Northeast wind 13 to 17 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Rain

    Low: 47 °F

  • Monday

    Monday: Rain and thunderstorms likely, mainly before noon.  Cloudy, with a high near 56. Northeast wind 8 to 10 mph becoming north in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Rain Likely

    High: 56 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 46.

    Mostly Cloudy

    Low: 46 °F

  • Tuesday

    Tuesday: Partly sunny, with a high near 61.

    Partly Sunny

    High: 61 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 49.

    Partly Cloudy

    Low: 49 °F

  • Wednesday

    Wednesday: Partly sunny, with a high near 61.

    Partly Sunny

    High: 61 °F

Detailed Forecast

Today
Mostly sunny, with a high near 57. East wind 3 to 7 mph.
Tonight
Increasing clouds, with a low around 43. Southeast wind around 6 mph.
Sunday
Rain, mainly after 9am. High near 50. East wind 8 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain, mainly before 3am. Low around 47. Northeast wind 13 to 17 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain and thunderstorms likely, mainly before noon. Cloudy, with a high near 56. Northeast wind 8 to 10 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Mostly cloudy, with a low around 46.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Thursday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 48.
Friday
Partly sunny, with a high near 60.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
9:21 am EDT Apr 30, 2016
10am EDT Apr 30, 2016-6pm EDT May 6, 2016
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database