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Heavy Rains and Potential for Flash Floods

Severe thunderstorms with damaging winds and heavy rains will be possible from the Ohio Valley to the Northeast Tuesday. In addition, heavy rains possible in the central Plains and southern Rockies. Heavy rain threat moves into the southern Mid-Atlantic Wednesday. Dry conditions remain out west where isolated dry thunderstorms could exacerbate ongoing fires and start new fires. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

24°C

75°F

Humidity 96%
Wind Speed SW 11 km/h
Barometer 1017.7 mb (30.06 in)
Dewpoint 23°C (74°F)
Visibility 16 km
Last update 22 Aug 2:56 am EDT
Extended Forecast for

West Sayville NY

  • Overnight

    Overnight: Isolated showers and thunderstorms.  Partly cloudy, with a low around 23. Southwest wind around 11 km/h.  Chance of precipitation is 20%.

    Isolated
    T-storms

    Low: 23 °C

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30. Southwest wind 14 to 19 km/h increasing to 21 to 26 km/h in the afternoon.

    Mostly Sunny

    High: 30 °C

  • Tuesday
    Night

    Tuesday Night: Scattered showers and thunderstorms, mainly after 7pm.  Increasing clouds, with a low around 22. Breezy, with a southwest wind 24 to 32 km/h, with gusts as high as 48 km/h.  Chance of precipitation is 50%.

    Scattered
    T-storms and
    Breezy

    Low: 22 °C

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, mainly before noon.  Cloudy, then gradually becoming mostly sunny, with a high near 29. Southwest wind 13 to 18 km/h becoming northwest in the afternoon.  Chance of precipitation is 30%.

    Scattered
    T-storms

    High: 29 °C

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 16. North wind around 11 km/h.

    Partly Cloudy

    Low: 16 °C

  • Thursday

    Thursday: Sunny, with a high near 26.

    Sunny

    High: 26 °C

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 17.

    Partly Cloudy

    Low: 17 °C

  • Friday

    Friday: Sunny, with a high near 25.

    Sunny

    High: 25 °C

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 16.

    Mostly Clear

    Low: 16 °C

Detailed Forecast

Overnight
Isolated showers and thunderstorms. Partly cloudy, with a low around 23. Southwest wind around 11 km/h. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 30. Southwest wind 14 to 19 km/h increasing to 21 to 26 km/h in the afternoon.
Tuesday Night
Scattered showers and thunderstorms, mainly after 7pm. Increasing clouds, with a low around 22. Breezy, with a southwest wind 24 to 32 km/h, with gusts as high as 48 km/h. Chance of precipitation is 50%.
Wednesday
Scattered showers and thunderstorms, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 29. Southwest wind 13 to 18 km/h becoming northwest in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 16. North wind around 11 km/h.
Thursday
Sunny, with a high near 26.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Sunny, with a high near 25.
Friday Night
Mostly clear, with a low around 16.
Saturday
Sunny, with a high near 24.
Saturday Night
Mostly clear, with a low around 17.
Sunday
Sunny, with a high near 25.
Sunday Night
Partly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 25.
Click Map For Forecast
Point Forecast:
West Sayville NY
 40.74°N 73.1°W (Elev. 9 m)
3:30 am EDT Aug 22, 2017
3am EDT Aug 22, 2017-6pm EDT Aug 28, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database