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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Last Update: 309 PM PDT Wed Jul 17 2019

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Seattle, WA Local Forecast Office

23NM ENE Port Angeles WA

Marine Zone Forecast

...GALE WARNING IN EFFECT UNTIL 3 AM PDT THURSDAY...

Synopsis: PZZ100-180715- 309 PM PDT Wed Jul 17 2019 .Synopsis for the northern and central Washington coastal and inland waters...A front will move through Western Washington this afternoon with small craft advisory strength southerly winds over most waters. Westerly gales will develop behind the front in the Strait of Juan de Fuca tonight. Weak high pressure will build toward the area over the weekend. $$

Tonight
W wind 25 to 35 kt. Wind waves 4 to 6 ft. A slight chance of showers.
Thu
W wind 10 to 20 kt rising to 15 to 25 kt in the afternoon. Wind waves 2 to 4 ft. A slight chance of showers in the morning then a chance of showers in the afternoon.
Thu Night
W wind 20 to 30 kt. Wind waves 3 to 5 ft. A slight chance of showers in the evening.
Fri
W wind 5 to 15 kt. Wind waves 2 ft or less.
Fri Night
W wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sat
W wind 5 to 15 kt becoming NW to 10 kt in the afternoon. Wind waves 2 ft or less.
Sat Night
NW wind 15 to 20 kt becoming W 10 to 20 kt after midnight. Wind waves 1 to 3 ft.
Sun
W wind to 10 kt. Wind waves 1 ft or less.
Mon
W wind 5 to 15 kt. Wind waves 2 ft or less.
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ABOUT THIS FORECAST

Last Update: 309 PM PDT Wed Jul 17 2019
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