Severe Thunderstorms Possible in Parts of the Eastern and Central U.S. Today. Some Storms May Bring Heavy Rain and Flash Flooding in the Central U.S.

Severe thunderstorms will be possible over portions of the eastern United States, from new England to the Mid-Atlantic, today. Severe thunderstorms are also possible over portions of the Central Plains, mainly Kansas and eastern Colorado. Heavy rain associated with some of the storms in the Plains may cause flash flooding.
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Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

75°F

24°C

Humidity 82%
Wind Speed SE 16 mph
Barometer 29.98 in (1015.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 1 Jul 12:56 pm EDT
Extended Forecast for

Holtsville NY

  • This
    Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Mostly cloudy, with a high near 81. South wind 13 to 15 mph.

    Chance
    T-storms

    High: 81 °F

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then a chance of showers. Some storms could be severe, with damaging winds and heavy rain.  Cloudy, then gradually becoming partly cloudy, with a low around 65. South wind 6 to 10 mph becoming west after midnight.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Severe
    Thunderstorms

    Low: 65 °F

  • Saturday

    Saturday: Sunny, with a high near 83. Northwest wind 10 to 13 mph.

    Sunny

    High: 83 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 61. West wind 5 to 11 mph.

    Mostly Clear

    Low: 61 °F

  • Sunday

    Sunday: Sunny, with a high near 82. West wind 7 to 10 mph.

    Sunny

    High: 82 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 67.

    Partly Cloudy

    Low: 67 °F

  • Independence
    Day

    Independence Day: Mostly sunny, with a high near 83.

    Mostly Sunny

    High: 83 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 68.

    Mostly Cloudy

    Low: 68 °F

  • Tuesday

    Tuesday: Partly sunny, with a high near 82.

    Partly Sunny

    High: 82 °F

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 81. South wind 13 to 15 mph.
Tonight
Showers and thunderstorms likely before 2am, then a chance of showers. Some storms could be severe, with damaging winds and heavy rain. Cloudy, then gradually becoming partly cloudy, with a low around 65. South wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Sunny, with a high near 83. Northwest wind 10 to 13 mph.
Saturday Night
Mostly clear, with a low around 61. West wind 5 to 11 mph.
Sunday
Sunny, with a high near 82. West wind 7 to 10 mph.
Sunday Night
Partly cloudy, with a low around 67.
Independence Day
Mostly sunny, with a high near 83.
Monday Night
Mostly cloudy, with a low around 68.
Tuesday
Partly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Mostly sunny, with a high near 83.
Click Map For Forecast
Point Forecast:
Holtsville NY
 40.82°N 73.05°W (Elev. 112 ft)
1:02 pm EDT Jul 1, 2016
1pm EDT Jul 1, 2016-6pm EDT Jul 7, 2016
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database