Seattle sizzles in the 90s once again

Seattle sizzles in the 90s once again

SEATTLE -- Back in early August, I trotted out the "sizzle" headline before a budding warm stretch of weather that weekend, but put in the caveat that we knew it wasn't very hot by other standards, yet when compared to where we had been, mid-upper 80s was going to be considered a "sizzle." (Never mind that it did eventually reach the low 90s.))

This time around, I use "sizzle" with no reservations. When you're bumping up against record highs in the middle of August, it's a true Seattle sizzler.

A thermal trough is entrenched across the region, clearing out the clouds and boosting temperatures back into the 90s for many locations.

Seattle hit 94 degrees, while it was also 94 in Tacoma, 95 in Olympia, 91 in Bremerton, 93 in Renton, 92 in North Bend, and 97 in Shelton.

Further north, it was a little cooler, emphasis on "little": Everett and Friday Harbor hit 87, while Bellingham, Mount Vernon and Port Angeles each checked in at 85. Arlington did manage to join its southern friends in reaching 90.

Over on the coast, it was a mixed bag of weather as the cool marine layer made its trek north. Astoria never got out of the clouds and managed a cool 66 degree high. Hoquiam rapidly warmed to 83 in the late morning, but then dropped 12 degrees in an hour from 81 to 69, eventually bottoming out at 61.

But Forks had no such cooling and reached 89 Thursday.

The heat has prompted an Excessive Heat Warning to be issued for the greater Puget Sound area, the Cascade foothills and Southwestern Washington through Friday night.

A dangerous Red Flag Warning is also in effect through Thursday in the Olympic Mountains meaning fire conditions are critical and the combination of heat, dry, and gusty winds could rapidly exacerbate any fire that is sparked. The warning was canceled for the Cascade foothills due to a lack of wind but it's still tinder dry fire conditions up there.

By Friday, the coast should remain cool into the 60s and 70s as the thermal trough moves inland and the marine breezes return, but no such luck for the interior locations.  For Seattle, we're going with another 94 degree high. Southwestern Washington and the Cascade foothills could nudge into the mid-upper 90s.

The thermal trough moves into Eastern Washington Friday night which will kill off the dry, east wind and the 90s for Saturday, but it'll still be warm (in the low-mid 80s) and we'll introduce some humidity as well as the upper air flow turns from the south. We'll even toss in a chance of a few thunderstorms late Saturday through the night into early Sunday morning.

You are right, it's usually not in the 90s this often

Thursday and Friday will mark the third and fourth day above 90 in Seattle. Seattle averages between 2-3 days a year above 90 with a day over 95 about every other year, last occurring in 2010. But 90s have been way more frequent of late. In 2009, we had seven days in the 90s, and six days in 2010. We took a 90s break in 2011, only reaching 87 that year, but have already reached 93 twice earlier this month.

So getting four days in the 90s in a summer is not unheard of, but bunching them together in August is rare. According to Jason Phelps, getting four days at or above 90 in August has only happened three times before -- six in 1977, five in 1981 and four in 1967.

(Of course, it could be worse. Our sister station in Bakersfield, California has this story about a garbage can that spontaneously exploded in a garage there this summer. Triple digits are common there in the summer but they've been pushing 110 degrees of late.)

The requisite "I'm too hot, I need some news to make me feel cooler" segment

If you're melting along with no air conditioning and your home can now double as a pizza oven, here is some news to help at least perhaps make you think about cooler air.

First of all, the new 30 day forecast is out for September and while it looks like it'll remain dry across Western Washington, forecasters believe the hot ridge of high pressure will return to the Midwest and East Coast, leaving the West Coast cooler than normal -- very similar to the June and July we went through this year.

And if you can't wait until September, this nearly 6 minute video of gentle, Seattle rains might help.

As for the real cooler air, it'll start its return on Sunday when we'll be gradually getting back to "Seattle normal" with morning clouds, then sunshine with decreasing humidity and highs back into the 70s.