Heavy Rainfall, Flooding, And Severe Thunderstorm Threats From The Mid South To The Great Lakes Today And Tonight

A slow moving low pressure system and cold front will bring the potential for severe thunderstorms capable of producing damaging winds and isolated tornadoes from portions of the Mid South to the Midwest and Great Lakes today and tonight. Heavy rainfall could also lead to flooding concerns. The severe weather threat will shift to the Mid Atlantic and Northeast on Wednesday. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain

72°F

22°C

Humidity 100%
Wind Speed S 17 G 30 mph
Barometer 30.16 in (1021.2 mb)
Dewpoint 72°F (22°C)
Visibility 8.00 mi
Last update 25 Sep 7:56 pm EDT
Extended Forecast for

Islip NYSimilar City Names

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms after 11pm. Some of the storms could produce heavy rainfall.  Patchy fog after 1am. Low around 69. South wind 10 to 13 mph.  Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Heavy Rain
    then Chance
    Showers and
    Patchy Fog

    Low: 69 °F

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 78. South wind 9 to 14 mph.

    Chance
    T-storms

    High: 78 °F

  • Wednesday
    Night

    Wednesday Night: Showers and thunderstorms likely before 3am, then a slight chance of showers. Some of the storms could produce gusty winds.  Mostly cloudy, with a low around 61. Southwest wind around 10 mph becoming north after midnight.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    T-storms
    Likely

    Low: 61 °F

  • Thursday

    Thursday: Partly sunny, with a high near 70. North wind 8 to 11 mph.

    Partly Sunny

    High: 70 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers.  Mostly cloudy, with a low around 58. East wind around 7 mph.

    Slight Chance
    Showers

    Low: 58 °F

  • Friday

    Friday: A 30 percent chance of showers before noon.  Mostly cloudy, with a high near 70.

    Chance
    Showers then
    Partly Sunny

    High: 70 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 60.

    Partly Cloudy

    Low: 60 °F

  • Saturday

    Saturday: Sunny, with a high near 72.

    Sunny

    High: 72 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 58.

    Mostly Clear

    Low: 58 °F

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms after 11pm. Some of the storms could produce heavy rainfall. Patchy fog after 1am. Low around 69. South wind 10 to 13 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. South wind 9 to 14 mph.
Wednesday Night
Showers and thunderstorms likely before 3am, then a slight chance of showers. Some of the storms could produce gusty winds. Mostly cloudy, with a low around 61. Southwest wind around 10 mph becoming north after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Partly sunny, with a high near 70. North wind 8 to 11 mph.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 58. East wind around 7 mph.
Friday
A 30 percent chance of showers before noon. Mostly cloudy, with a high near 70.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 68.
Monday Night
Mostly cloudy, with a low around 59.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 73.
Click Map For Forecast
Point Forecast:
Islip NYSimilar City Names
 40.73°N 73.22°W (Elev. 7 ft)
7:56 pm EDT Sep 25, 2018
9pm EDT Sep 25, 2018-6pm EDT Oct 2, 2018
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database