National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorm and Flash Flooding Risks from Southern Plains to Midwest; Heat Wave Developing in the Southeast

Severe thunderstorms and flash flooding will again be possible from the Southern Plains into the Midwest on Friday. Periodic risks of severe thunderstorms, along with flash flooding, are forecast from the Central and Southern Plains to the Great Lakes and Northeast into the Memorial Day weekend. Temperatures across much of the East will run above normal where they will hold into Memorial Day. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

61°F

16°C

Humidity 97%
Wind Speed SW 12 mph
Barometer 29.83 in (1009.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 23 May 10:56 pm EDT
Extended Forecast for

Islip NYSimilar City Names

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between midnight and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 59. West wind 11 to 13 mph.

    Chance
    T-storms

    Low: 59 °F

  • Friday

    Friday: Sunny, with a high near 72. Breezy, with a northwest wind 16 to 20 mph, with gusts as high as 31 mph.

    Sunny and
    Breezy

    High: 72 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 53. North wind 5 to 10 mph becoming southeast after midnight.

    Mostly Clear

    Low: 53 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 67. West wind 6 to 11 mph becoming south in the afternoon.

    Mostly Sunny

    High: 67 °F

  • Saturday
    Night

    Saturday Night: A slight chance of showers and thunderstorms, then a chance of showers after midnight. Mostly cloudy, with a low around 59. South wind 11 to 14 mph. Chance of precipitation is 40%.

    Slight Chance
    T-storms then
    Chance
    Showers

    Low: 59 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 78.

    Mostly Sunny

    High: 78 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 61.

    Partly Cloudy

    Low: 61 °F

  • Memorial
    Day

    Memorial Day: Mostly sunny, with a high near 74.

    Mostly Sunny

    High: 74 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 59.

    Partly Cloudy

    Low: 59 °F

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly between midnight and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 59. West wind 11 to 13 mph.
Friday
Sunny, with a high near 72. Breezy, with a northwest wind 16 to 20 mph, with gusts as high as 31 mph.
Friday Night
Mostly clear, with a low around 53. North wind 5 to 10 mph becoming southeast after midnight.
Saturday
Mostly sunny, with a high near 67. West wind 6 to 11 mph becoming south in the afternoon.
Saturday Night
A slight chance of showers and thunderstorms, then a chance of showers after midnight. Mostly cloudy, with a low around 59. South wind 11 to 14 mph. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 61.
Memorial Day
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 75.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 62.
Thursday
Partly sunny, with a high near 78.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Islip NYSimilar City Names
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
9:37 pm EDT May 23, 2019
Forecast Valid:
11pm EDT May 23, 2019-6pm EDT May 30, 2019
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation