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

6NM SW Seattle WA

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM PDT THIS EVENING...

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
S wind 15 to 25 kt becoming SW 10 to 20 kt after midnight. Wind waves 2 to 4 ft. Showers likely in the evening then a chance of showers after midnight.
Thu
S wind to 10 kt becoming SW 5 to 15 kt in the afternoon. Wind waves 2 ft or less. A chance of showers.
Thu Night
NW wind 5 to 15 kt becoming S to 10 kt after midnight. Wind waves 2 ft or less. A chance of showers in the evening.
Fri
S wind to 10 kt. Wind waves 1 ft or less.
Fri Night
NE wind to 10 kt becoming variable after midnight. Wind waves 1 ft or less.
Sat
Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Sat Night
N wind to 10 kt. Wind waves 1 ft or less.
Sun
Light wind becoming NW to 10 kt. Wind waves 1 ft or less.
Mon
Light wind. Wind waves 1 ft or less.
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ABOUT THIS FORECAST

Last Update: 309 PM PDT Wed Jul 17 2019
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