Dangerous heat and humidity from the central U.S. to East Coast this weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central and eastern U.S. Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest, Ohio Valley, Mid-Atlantic and southern states. Be very cautious if you must do outdoor activities in these areas during the afternoon and evening this weekend.
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Hazardous Weather Conditions

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Honolulu, HI Local Forecast Office

8NM ESE Waimanalo Beach HI

Marine Point Forecast

[NOTICE]
  • This
    Afternoon

    Tropical Storm Conditions Possible

    Tropical Storm Conditions Possible

    High: 80 °F

  • Tonight

    Tropical Storm Conditions Expected

    Tropical Storm Conditions Expected

    Low: 79 °F

  • Sunday

    Tropical Storm Conditions Expected

    Tropical Storm Conditions Expected

    High: 80 °F

  • Sunday
    Night

    Tropical Storm Conditions Expected

    Tropical Storm Conditions Expected

    Low: 79 °F

  • Monday

    Heavy Rain

    SE 13kt
    8ftWaves Subsiding

    High: 80 °F

  • Monday
    Night

    Scattered Showers

    E 13kt
    5ft

    Low: 79 °F

  • Tuesday

    Scattered Showers

    ENE 15kt
    5-6ft

    High: 80 °F

  • Tuesday
    Night

    Scattered Showers

    ENE 17kt
    6ft

    Low: 79 °F

  • Wednesday

    Scattered Showers

    ENE 20kt
    6ft

    High: 80 °F


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:06 am HST Jul 23, 2016
Forecast Valid: 2pm HST Jul 23, 2016-6pm HST Jul 29, 2016

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Detailed Forecast

...TROPICAL STORM WARNING IN EFFECT...

Synopsis: AT 11 AM HST...TROPICAL STORM DARBY WAS CENTERED NEAR 18.9N 154.8W...OR ABOUT 60 MILES SOUTH SOUTHEAST OF HILO HAWAII...AND WAS MOVING WEST 09 KT. ELSEWHERE...A STRONG PRESSURE GRADIENT BETWEEN DARBY AND A HIGH FAR NORTH OF THE STATE WILL GENERATE FRESH TO STRONG NORTHEAST WINDS.

This Afternoon
Tropical storm conditions possible. NNE wind 20 to 25 kt. Showers likely. The rain could be heavy at times. Mixed swell...SW 2 ft at 14 seconds and E 5 ft at 11 seconds. Waves around 10 ft.
Tonight
Tropical storm conditions expected. NNE wind 24 to 34 kt, with gusts as high as 42 kt. Frequent showers. The rain could be heavy at times. Mixed swell...SW 2 ft at 13 seconds and E 4 ft at 10 seconds. Waves 10 ft building to 14 ft.
Sunday
Tropical storm conditions expected. NNE wind 26 to 36 kt becoming SSE. Winds could gust as high as 49 kt. Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. SW swell 2 ft at 13 seconds. Waves 19 ft subsiding to 12 ft.
Sunday Night
Tropical storm conditions expected. S wind 25 to 35 kt decreasing to 9 to 14 kt. Winds could gust as high as 49 kt. Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. SW swell 2 ft. Waves 12 ft subsiding to 8 ft.
Monday
SE wind 10 to 13 kt, with gusts as high as 24 kt. Showers likely, mainly before noon. The rain could be heavy at times. S swell 2 ft. Waves 8 ft subsiding to 5 ft.
Monday Night
E wind 10 to 13 kt. Scattered showers, mainly before midnight. S swell 2 ft. Waves around 5 ft.
Tuesday
ENE wind 13 to 15 kt. Scattered showers. S swell 2 ft. Waves 5 to 6 ft.
Tuesday Night
ENE wind around 17 kt. Scattered showers. S swell 2 ft. Waves around 6 ft.
Wednesday
ENE wind 17 to 20 kt, with gusts as high as 26 kt. Scattered showers. S swell 2 ft becoming SW. Waves around 6 ft.

*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: 21.27°N 157.55°W
Last Update: 7:06 am HST Jul 23, 2016
Forecast Valid: 2pm HST Jul 23, 2016-6pm HST Jul 29, 2016
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