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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Seattle, WA Local Forecast Office

11NM S Seattle WA

Marine Point Forecast

[NOTICE]
  • Today

    Chance Showers

    S 14km/hWinds Decreasing
    < 1m
  • Tonight

    Chance Showers

    N 27km/hWinds Decreasing
    < 1m
  • Friday

    Slight Chc Showers

    NW 14km/h
    < 1m
  • Friday
    Night

    Mostly Clear

    Winds IncreasingNE 26km/h
    < 1m
  • Saturday

    Sunny

    NNW 23km/h
    < 1m
  • Saturday
    Night

    Clear

    NNE 23km/h
    < 1m
  • Sunday

    Sunny

    NNW 13km/h
    < 1m
  • Sunday
    Night

    Clear

    NNW 13km/h
    < 1m
  • Monday

    Sunny

    Light Wind
    < 1m

Associated Zone Forecast which includes this point

Last Update: 4:02 am PDT Jul 18, 2019
Forecast Valid: 6am PDT Jul 18, 2019-6pm PDT Jul 24, 2019

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Detailed Forecast


Synopsis: PZZ100-181900- 259 AM PDT Thu Jul 18 2019 .Synopsis for the northern and central Washington coastal and inland waters...Continued onshore flow will allow for small craft advisory level winds again this afternoon and tonight in the strait and adjacent waters. This onshore flow will ease somewhat on Friday. Weak high pressure will build toward the area over the weekend. $$

Today
S wind 9 to 14 km/h becoming variable and less than 5 km/h in the afternoon. A chance of showers, mainly after 11am. Wind waves 1 m or less.
Tonight
N wind 22 to 27 km/h becoming E 10 to 15 km/h in the evening. Winds could gust as high as 37 km/h. A chance of showers, mainly before 11pm. Wind waves 1 m or less.
Friday
S wind around 14 km/h becoming NW in the afternoon. A slight chance of showers before 11am. Wind waves 1 m or less.
Friday Night
N wind 11 to 16 km/h becoming NE 21 to 26 km/h in the evening. Winds could gust as high as 34 km/h. Mostly clear. Wind waves 1 m or less.
Saturday
NNE wind 16 to 23 km/h becoming NNW in the morning. Sunny. Wind waves 1 m or less.
Saturday Night
NNE wind 16 to 23 km/h. Clear. Wind waves 1 m or less.
Sunday
NNW wind 11 to 13 km/h. Sunny. Wind waves 1 m or less.
Sunday Night
NNW wind 5 to 13 km/h becoming NE in the evening. Clear. Wind waves 1 m or less.
Monday
Variable winds 5 km/h or less. Sunny. Wind waves 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: 47.45°N 122.4°W
Last Update: 4:02 am PDT Jul 18, 2019
Forecast Valid: 6am PDT Jul 18, 2019-6pm PDT Jul 24, 2019
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