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Heavy rain and flash flooding possible in portions of the Southwest this weekend

An upper-level low in the Southwest U.S. will act as a trigger for thunderstorms this weekend. The area of greatest concern is in New Mexico, southeast Utah and portions of southern Colorado. Storms will be slow moving and could bring several rounds of rain to the same areas. Rainfall amounts may exceed 3 inches in localized areas. Flash Flood Watches are in effect. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

30°C

86°F

Humidity 49%
Wind Speed SW 22 km/h
Barometer 1010.3 mb (29.84 in)
Dewpoint 18°C (65°F)
Visibility 16 km
Heat Index31°C (88°F)
Last update 19 Aug 2:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Tonight

    Tonight: Mostly clear, with a low around 21. West wind 8 to 18 km/h.

    Mostly Clear

    Low: 21 °C

  • Sunday

    Sunday: Sunny, with a high near 31. Northwest wind 11 to 21 km/h.

    Sunny

    High: 31 °C

  • Sunday
    Night

    Sunday Night: Clear, with a low around 19. Southwest wind 8 to 13 km/h becoming light and variable  after midnight.

    Clear

    Low: 19 °C

  • Monday

    Monday: Sunny, with a high near 30. Northwest wind 5 to 10 km/h becoming southwest 11 to 16 km/h in the afternoon.

    Sunny

    High: 30 °C

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 22. Southwest wind 11 to 13 km/h.

    Mostly Clear

    Low: 22 °C

  • Tuesday

    Tuesday: Sunny, with a high near 31.

    Sunny

    High: 31 °C

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after midnight.  Mostly cloudy, with a low around 22.

    Partly Cloudy
    then Chance
    T-storms

    Low: 22 °C

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 30.

    Chance
    T-storms

    High: 30 °C

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, with a low around 19.

    Mostly Cloudy

    Low: 19 °C

Detailed Forecast

Tonight
Mostly clear, with a low around 21. West wind 8 to 18 km/h.
Sunday
Sunny, with a high near 31. Northwest wind 11 to 21 km/h.
Sunday Night
Clear, with a low around 19. Southwest wind 8 to 13 km/h becoming light and variable after midnight.
Monday
Sunny, with a high near 30. Northwest wind 5 to 10 km/h becoming southwest 11 to 16 km/h in the afternoon.
Monday Night
Mostly clear, with a low around 22. Southwest wind 11 to 13 km/h.
Tuesday
Sunny, with a high near 31.
Tuesday Night
A 30 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 22.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 30.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Sunny, with a high near 27.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Mostly sunny, with a high near 26.
Friday Night
Partly cloudy, with a low around 17.
Saturday
Click Map For Forecast
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 30 m)
2:30 pm EDT Aug 19, 2017
3pm EDT Aug 19, 2017-6pm EDT Aug 26, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database