Preview of NWS' New Point Forecast Icons
Effective July 7, 2015, NWS will implement changes to the icons depicted on all of its Point Forecast pages. Highlights will include new icons with increased clarity, 6-hour increments for rapidly changing weather and new color blocks to highlight forecast hazards.

You may preview these updates in real time for this location. View additional details, and send any comments to icons@noaa.gov.

Please note the preview site is not operational, so performance may be slow during periods of peak access.

Strong thunderstorms are possible from southwestern Texas to northern Maine on Saturday

Strong to severe thunderstorms are possible Saturday from southwestern Texas to northern Maine. Primary threats will be damaging wind gusts with marginally severe hail also possible. In addition, moderate to heavy rainfall could produce flash flooding from the lower Mississippi Valley into the Ohio Valley.
Read More...

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog/Mist

62°F

17°C

Humidity 90%
Wind Speed S 5 mph
Barometer 30.22 in (1023.4 mb)
Dewpoint 59°F (15°C)
Visibility 4.00 mi
Last update 29 May 11:56 pm EDT
Extended Forecast for

Holtsville NY

  • Overnight

    Areas Fog

    Areas
    Fog

    Low: 59 °F

  • Saturday

    Areas Fog

    Areas
    Fog

    High: 77 °F

  • Saturday
    Night

    Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

    Slight Chc
    Thunderstorms

    Low: 62 °F

  • Sunday

    Showers Likely Chance for Measurable Precipitation 60%

    Showers
    Likely

    High: 74 °F

  • Sunday
    Night

    Showers Likely Chance for Measurable Precipitation 60%

    Showers
    Likely

    Low: 58 °F

  • Monday

    Showers Likely Chance for Measurable Precipitation 70%

    Showers
    Likely

    High: 62 °F

  • Monday
    Night

    Showers Likely Chance for Measurable Precipitation 60%

    Showers
    Likely

    Low: 53 °F

  • Tuesday

    Chance Showers Chance for Measurable Precipitation 40%

    Chance
    Showers

    High: 64 °F

  • Tuesday
    Night

    Mostly Cloudy

    Mostly
    Cloudy

    Low: 50 °F

Detailed Forecast

Overnight
Areas of fog. Otherwise, mostly cloudy, with a low around 59. South wind 3 to 5 mph.
Saturday
Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 77. South wind 7 to 17 mph.
Saturday Night
A slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 62. South wind 10 to 14 mph. Chance of precipitation is 20%.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 74. Southwest wind around 8 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 58. East wind 9 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Showers likely. Cloudy, with a high near 62. Breezy. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Showers likely. Cloudy, with a low around 53. Chance of precipitation is 60%.
Tuesday
A chance of showers. Cloudy, with a high near 64. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 76.
  Click Map For Forecast
Point Forecast:
Holtsville NY
 40.82°N 73.05°W
10:25 pm EDT May 29, 2015
1am EDT May 30, 2015-6pm EDT Jun 5, 2015
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database