Updated Friday 11:50 p.m.
At this point, we might as well embrace it. Hit the beach. Get friendly with someone with a boat. Make some lemonade out of this, er, sunshine..! This is the summer sizzle that just won't quit, and as temps continue to soar, it doesn't look like we'll see a major cool-down any time soon. In fact, it's about to get hotter.
Highs on Friday soared again into the 90s in the greater Seattle area, and with a temperature of 92 degrees at Sea Tac, we again set another high temperature record (the former record of 90 had been in place since 1972). Hotter still was the I-5 corridor from Olympia south to the Oregon state line, with highs in the middle 90s near the state capital. Eighties were common from the San Juans to Everett, but if you needed something cooler, at least there were still some 60s and 70s to be found near the ocean beaches. But not for long.
Conditions on Saturday will be similar to Friday. Overnight lows will drop into the 50s in the outskirts and 60s downtown (campers have probably never been so comfortable sleeping under the stars outside!), but as soon as the sun comes up, we'll soar again to either side of 90 degrees in Seattle and Tacoma--one of the hottest Fouth of July afternoons we've had in awhile. For fireworks time, the weather will be mild--70s and 80s with starry, clear skies at showtime. At least visibility will be great for the big displays...we can't say that every year!
However, the heat will become extreme on Sunday. Not only will we have this massive ridge of high pressure over the top of us, but surface winds will begin to change. They've been northerly of late, but by Sunday they tilt northeasterly, which is the warmest, driest wind direction we can get in the heat of the summer. Afternoon highs will skyrocket into the middle to upper 90s throughout much of Western Washington, and communities near the Cascade foothills will flirt with the century mark. Looking to cool down by heading to the ocean beaches? Not so fast. Northeasterly winds will warm the coast, too, with 80s and 90s from Forks to Ocean Shores.
Monday will be nearly as hot, with plenty of middle 90s left around Puget Sound. The forecasting models are hinting at a marine push on Tuesday, so that will fog up the ocean beaches, and should at least knock the temps along the I-5 corridor back into the upper 80s. Further down the line, the models try to bring us back to about 80 by Friday. Yeah, yeah, we've heard that before. (It's because the models are more heavily weighted in climatology 7-10 days out, and from a climate stand-point, Seattle shouldn't be this hot!). At this point, enjoy your 27th glass of ice-cold lemonade and brace for more!
Meteorologist Shannon O'Donnell
The KOMO4 Forecast Team