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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45NM NW San Francisco CA

Marine Point Forecast

[NOTICE]
  • Tonight

    Mostly Cloudy

    NW 22kt
    5-6ft

    Small Craft Advisory
    Small Craft Advisory

  • Thursday

    Patchy Fog

    NW 15ktWinds Decreasing
    4-5ft

    Small Craft Advisory
    Small Craft Advisory

  • Thursday
    Night

    Patchy Fog

    Winds IncreasingSSE 8kt
    4ft
  • Friday

    Patchy Fog

    Winds IncreasingS 8kt
    3-4ft
  • Friday
    Night

    Mostly Cloudy

    Light Wind
    3ft
  • Saturday

    Mostly Cloudy

    Winds IncreasingSSW 6kt
    2-3ft
  • Saturday
    Night

    Patchy Fog

    WNW 6ktWinds Decreasing
    2ft
  • Sunday

    Patchy Fog

    Light Wind
    2ft
  • Sunday
    Night

    Partly Cloudy

    W 6ktWinds Decreasing
    2ft

Associated Zone Forecast which includes this point

Last Update: 1:34 pm PDT Jul 17, 2019
Forecast Valid: 8pm PDT Jul 17, 2019-6pm PDT Jul 24, 2019

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Detailed Forecast


Synopsis: PZZ500-181030- 246 PM PDT Wed Jul 17 2019 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Moderate northwest winds across the waters north of Point Reyes through Thursday, with lighter northwest winds elsewhere. Wind driven northwest seas may be locally steep and hazardous to small craft vessels. Light long period southerly swell will continue into Thursday. $$

Tonight
NW wind 18 to 22 kt. Mostly cloudy. Mixed swell...W 1 ft at 7 seconds and S 1 to 2 ft at 16 seconds. Wind waves 4 to 6 ft.
Thursday
NW wind 10 to 15 kt becoming variable and less than 5 kt. Patchy fog between 8am and 11am. Mixed swell...W 1 ft at 7 seconds and S 1 ft at 15 seconds. Wind waves 4 to 5 ft.
Thursday Night
Variable winds less than 5 kt becoming SSE 5 to 8 kt after midnight. Patchy fog after 5am. Mixed swell...WSW 1 ft at 9 seconds and S 1 ft at 15 seconds. Wind waves around 4 ft.
Friday
Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Patchy fog before 8am. Mixed swell...W 1 ft and S 1 ft. Wind waves 3 to 4 ft.
Friday Night
Variable winds 5 kt or less. Mostly cloudy. Mixed swell...W 1 ft and S 1 ft. Wind waves around 3 ft.
Saturday
Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Mostly cloudy. Mixed swell...W 1 ft and S 1 ft. Wind waves 2 to 3 ft.
Saturday Night
WNW wind around 6 kt becoming variable and less than 5 kt in the evening. Patchy fog after 5am. Mixed swell...W 1 ft and S 1 ft. Wind waves around 2 ft.
Sunday
Variable winds 5 kt or less. Patchy fog before 8am. Mixed swell...W 1 ft and S 1 ft. Wind waves around 2 ft.
Sunday Night
W wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Mixed swell...W 1 ft and S 1 ft. Wind waves around 2 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: 38.3°N 123.07°W
Last Update: 1:34 pm PDT Jul 17, 2019
Forecast Valid: 8pm PDT Jul 17, 2019-6pm PDT Jul 24, 2019
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