Dangerous Heat and Humidity Building from the Plains to the East Coast

A strengthening ridge of high pressure will produce much above average temperatures from the Plains to the East Coast, a true summer heat wave. Highs in the 90s and triple digits combined w/ humidity and dewpoints surging into the upper 70s, if not low 80s, will create heat indices as high as 110 to 115 through this weekend. Air quality will likely be poor due to haze and little air circulation.
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New York, NY Local Forecast Office

15NM WSW Islip NY

Marine Point Forecast

[NOTICE]
  • Overnight

    Heavy Rain

    WSW 16km/hWinds Decreasing
    < 1m
  • Thursday

    Heavy Rain

    SE 13km/h
    < 1m
  • Thursday
    Night

    Chance Showers

    ESE 13km/hWinds Decreasing
    < 1m
  • Friday

    Mostly Sunny

    Winds IncreasingSSW 16km/h
    < 1m
  • Friday
    Night

    Partly Cloudy

    SSW 18km/h
    < 1m
  • Saturday

    Sunny

    W 18km/h
    < 1m
  • Saturday
    Night

    Mostly Clear

    W 21km/hWinds Decreasing
    < 1m
  • Sunday

    Mostly Sunny

    SW 13km/h
    < 1m
  • Sunday
    Night

    Chance Thunderstorms

    WSW 16km/hWinds Decreasing
    < 1m

Associated Zone Forecast which includes this point

Last Update: 7:06 pm EDT Jul 17, 2019
Forecast Valid: 11pm EDT Jul 17, 2019-6pm EDT Jul 24, 2019

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Detailed Forecast

...SEVERE THUNDERSTORM WATCH 516 IN EFFECT UNTIL 10 PM EDT THIS

Synopsis: ANZ300-180830- 359 PM EDT Wed Jul 17 2019 .Synopsis for the Long Island Waters and New York Harbor... A cold front and the remnant low of Barry then approach and slowly move through the region tonight and Thursday. The cold front then moves through late Thursday. High pressure will then remain centered over the Southeast into the weekend. Another weak cold front moves slowly through the area Saturday night, followed by a stronger cold front on Monday. $$

Overnight
WSW wind 13 to 16 km/h decreasing to 10 to 13 km/h after midnight. Showers and possibly a thunderstorm before 2am, then showers likely. Some of the storms could produce gusty winds and heavy rain. Seas 1 m or less.
Thursday
S wind 11 to 13 km/h becoming SE in the afternoon. Showers likely before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Some of the storms could produce heavy rain. Seas 1 m or less.
Thursday Night
ESE wind 10 to 13 km/h becoming NNE 5 to 8 km/h after midnight. A chance of showers and thunderstorms, mainly before midnight. Seas 1 m or less.
Friday
Variable winds less than 5 km/h becoming SSW 11 to 16 km/h in the morning. Mostly sunny. Seas 1 m or less.
Friday Night
SSW wind 14 to 18 km/h becoming WSW after midnight. Partly cloudy. Seas 1 m or less.
Saturday
W wind 13 to 18 km/h. Sunny. Seas 1 m or less.
Saturday Night
W wind 18 to 21 km/h decreasing to 14 to 17 km/h after midnight. Mostly clear. Seas 1 m or less.
Sunday
WNW wind 10 to 13 km/h becoming SW in the afternoon. Mostly sunny. Seas 1 m or less.
Sunday Night
WSW wind 13 to 16 km/h decreasing to 10 to 13 km/h after midnight. A chance of showers and thunderstorms. Seas 1 m or less.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
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ABOUT THIS FORECAST

Point Forecast: 40.61°N 73.51°W
Last Update: 7:06 pm EDT Jul 17, 2019
Forecast Valid: 11pm EDT Jul 17, 2019-6pm EDT Jul 24, 2019
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