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

48°F

9°C

Humidity 66%
Wind Speed E 5 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 29 Apr 1:56 am EDT
Extended Forecast for

Stony Brook NY

  • Overnight

    Overnight: A chance of light rain, mainly before 3am.  Cloudy, with a steady temperature around 44. East wind around 8 mph.  Chance of precipitation is 30%.

    Chance Light
    Rain

    Low: 44 °F

  • Friday

    Friday: Cloudy, with a high near 56. East wind 10 to 13 mph.

    Cloudy

    High: 56 °F

  • Friday
    Night

    Friday Night: A chance of showers, mainly between 7pm and 2am.  Cloudy, with a low around 42. East wind 5 to 10 mph becoming northeast after midnight.  Chance of precipitation is 40%.

    Chance
    Showers

    Low: 42 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 59. Northeast wind around 7 mph becoming east in the afternoon.

    Mostly Sunny

    High: 59 °F

  • Saturday
    Night

    Saturday Night: A slight chance of rain after 2am.  Mostly cloudy, with a low around 43. South wind 5 to 10 mph becoming light southeast.  Chance of precipitation is 20%.

    Partly Cloudy
    then Slight
    Chance Rain

    Low: 43 °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 59. Chance of precipitation is 50%.

    Chance Rain

    High: 59 °F

  • Monday
    Night

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

    Mostly Cloudy

    Low: 46 °F

Detailed Forecast

Overnight
A chance of light rain, mainly before 3am. Cloudy, with a steady temperature around 44. East wind around 8 mph. Chance of precipitation is 30%.
Friday
Cloudy, with a high near 56. East wind 10 to 13 mph.
Friday Night
A chance of showers, mainly between 7pm and 2am. Cloudy, with a low around 42. East wind 5 to 10 mph becoming northeast after midnight. Chance of precipitation is 40%.
Saturday
Mostly sunny, with a high near 59. Northeast wind around 7 mph becoming east in the afternoon.
Saturday Night
A slight chance of rain after 2am. Mostly cloudy, with a low around 43. South wind 5 to 10 mph becoming light southeast. 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 59. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 48.
Wednesday
Partly sunny, with a high near 60.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
A chance of showers. Partly sunny, with a high near 61. Chance of precipitation is 30%.
Click Map For Forecast
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 ft)
12:58 am EDT Apr 29, 2016
2am 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