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

22NM SSW Seattle WA

Marine Point Forecast

[NOTICE]
  • Today

    Slight Chc Showers

    SW 21km/h
    < 1m
  • Tonight

    Slight Chc Showers

    W 21km/hWinds Decreasing
    < 1m
  • Friday

    Mostly Sunny

    SSW 11km/h
    < 1m
  • Friday
    Night

    Mostly Clear

    NE 21km/h
    < 1m
  • Saturday

    Sunny

    NNE 16km/h
    < 1m
  • Saturday
    Night

    Clear

    NNE 18km/h
    < 1m
  • Sunday

    Sunny

    N 10km/h
    < 1m
  • Sunday
    Night

    Clear

    N 13km/hWinds Decreasing
    < 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
SW wind 14 to 21 km/h. A slight chance of showers after 11am. Wind waves 1 m or less.
Tonight
W wind 16 to 21 km/h becoming SE 8 to 13 km/h in the evening. A slight chance of showers before 11pm. Wind waves 1 m or less.
Friday
SSW wind 8 to 11 km/h becoming ENE in the morning. Mostly sunny. Wind waves 1 m or less.
Friday Night
NE wind 18 to 21 km/h. Mostly clear. Wind waves 1 m or less.
Saturday
NNE wind 13 to 16 km/h. Sunny. Wind waves 1 m or less.
Saturday Night
NNE wind 11 to 18 km/h. Clear. Wind waves 1 m or less.
Sunday
N wind around 10 km/h. Sunny. Wind waves 1 m or less.
Sunday Night
N wind 8 to 13 km/h becoming variable and less than 5 km/h 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: 47.28°N 122.54°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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