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Heavy Rain and Potential for Flash Flooding

Strong to severe thunderstorms are forecast to develop along a frontal system stretching from portions of the Mississippi Valley into the Ohio Valley. These storms may produce heavy rain and flash flooding. The threat shifts east on Friday. Moonsoon moisture will continue to produce heavy rain with the possibility of localized flash flooding in the Four Corners area. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog/Mist

71°F

22°C

Humidity 96%
Wind Speed Calm
Barometer 29.86 in (1011.0 mb)
Dewpoint 70°F (21°C)
Visibility 6.00 mi
Last update 28 Jul 6:56 am EDT
Extended Forecast for

Islip NYSimilar City Names

  • Today

    Today: Partly sunny, with a high near 81. Light and variable wind becoming east 5 to 9 mph in the morning.

    Partly Sunny

    High: 81 °F

  • Tonight

    Tonight: A slight chance of light rain before 9pm, then rain, mainly after 9pm.  Low around 69. Northeast wind 3 to 7 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Chance Rain
    then Rain

    Low: 69 °F

  • Saturday

    Saturday: Rain likely, mainly before 10am.  Cloudy, with a high near 73. Breezy, with a northeast wind 17 to 23 mph.  Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Rain Likely
    and Breezy

    High: 73 °F

  • Saturday
    Night

    Saturday Night: A chance of rain before 10pm, then a slight chance of light rain after 10pm.  Mostly cloudy, with a low around 59. Northeast wind around 17 mph.  Chance of precipitation is 30%.

    Chance Rain

    Low: 59 °F

  • Sunday

    Sunday: Partly sunny, with a high near 78. Northeast wind 8 to 16 mph.

    Partly Sunny

    High: 78 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 65.

    Mostly Cloudy

    Low: 65 °F

  • Monday

    Monday: Partly sunny, with a high near 77.

    Partly Sunny

    High: 77 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 66.

    Mostly Cloudy

    Low: 66 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82.

    Mostly Sunny

    High: 82 °F

Detailed Forecast

Today
Partly sunny, with a high near 81. Light and variable wind becoming east 5 to 9 mph in the morning.
Tonight
A slight chance of light rain before 9pm, then rain, mainly after 9pm. Low around 69. Northeast wind 3 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain likely, mainly before 10am. Cloudy, with a high near 73. Breezy, with a northeast wind 17 to 23 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
A chance of rain before 10pm, then a slight chance of light rain after 10pm. Mostly cloudy, with a low around 59. Northeast wind around 17 mph. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 78. Northeast wind 8 to 16 mph.
Sunday Night
Mostly cloudy, with a low around 65.
Monday
Partly sunny, with a high near 77.
Monday Night
Mostly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
Mostly sunny, with a high near 85.
Click Map For Forecast
Point Forecast:
Islip NYSimilar City Names
 40.73°N 73.22°W (Elev. 7 ft)
6:02 am EDT Jul 28, 2017
7am EDT Jul 28, 2017-6pm EDT Aug 3, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database