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Severe Thunderstorm Threats and Areas of Heavy Rain This Week

A weather system producing areas of heavy rain will slowly move northeast along the east coast into mid-week. Meanwhile, a new weather system may produce severe thunderstorms potentially containing large hail, damaging winds, and isolated tornadoes in the Plains and Mississippi Valley. Heavy rain and flash flooding may also develop Wednesday for the Mississippi Valley and Upper Great Lakes. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Rain Fog/Mist

54°F

12°C

Humidity 97%
Wind Speed NE 15 G 23 mph
Barometer 29.95 in (1014.0 mb)
Dewpoint 53°F (12°C)
Visibility 1.00 mi
Wind Chill50°F (10°C)
Last update 25 Apr 5:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Coastal Flood Advisory until April 25, 11:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory until April 25, 11:00pm

    NOW until
    11:00pm Tue

    Coastal Flood Advisory

  • Tonight

    Tonight: Periods of rain and possibly a thunderstorm before 2am, then rain likely.  Low around 52. Breezy, with an east wind 15 to 24 mph, with gusts as high as 36 mph.  Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Rain and
    Breezy

    Low: 52 °F

  • Wednesday

    Wednesday: A chance of rain before 8am, then a chance of showers between 8am and 4pm.  Cloudy, with a high near 63. Northeast wind around 9 mph.  Chance of precipitation is 40%.

    Chance Rain

    High: 63 °F

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of showers, mainly between 10pm and 4am.  Patchy fog.  Otherwise, mostly cloudy, with a low around 53. Light northeast wind.

    Chance
    Showers and
    Patchy Fog

    Low: 53 °F

  • Thursday

    Thursday: Patchy fog before 10am.  Otherwise, mostly cloudy, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.

    Patchy Fog
    then Mostly
    Cloudy

    High: 64 °F

  • Thursday
    Night

    Thursday Night: Mostly cloudy, with a low around 54. South wind around 7 mph.

    Mostly Cloudy

    Low: 54 °F

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 11am.  Partly sunny, with a high near 73.

    Chance
    T-storms

    High: 73 °F

  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 57.

    Mostly Cloudy

    Low: 57 °F

  • Saturday

    Saturday: Partly sunny, with a high near 74.

    Partly Sunny

    High: 74 °F

Detailed Forecast

Tonight
Periods of rain and possibly a thunderstorm before 2am, then rain likely. Low around 52. Breezy, with an east wind 15 to 24 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A chance of rain before 8am, then a chance of showers between 8am and 4pm. Cloudy, with a high near 63. Northeast wind around 9 mph. Chance of precipitation is 40%.
Wednesday Night
A 30 percent chance of showers, mainly between 10pm and 4am. Patchy fog. Otherwise, mostly cloudy, with a low around 53. Light northeast wind.
Thursday
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 54. South wind around 7 mph.
Friday
A 30 percent chance of showers and thunderstorms after 11am. Partly sunny, with a high near 73.
Friday Night
Mostly cloudy, with a low around 57.
Saturday
Partly sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Partly sunny, with a high near 62.
Sunday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 52.
Monday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 68.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 65.
Click Map For Forecast
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
4:01 pm EDT Apr 25, 2017
6pm EDT Apr 25, 2017-6pm EDT May 2, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database