Another record toast, but cooler weather coming

Another record toast, but cooler weather coming
Image of Gizmo keeping cool provided by YouNews user Skirvins.

SEATTLE -- It's sort of like winning honorable mention after your brother just won the grand prize, but July 30, 2009 will at least go down as the hottest July 30 on record. 

Sea-Tac Airport hit 96 degrees, which breaks the daily high temperature on this date, which was 94, set in 1965.  Sure, it's not as illustrious as recording 103 degrees on your date and shattering the all time record which will likely cement July 29, 2009 in the record books for decades, but it's not a bad consolation prize.

In addition, there's another record that July 30th might be a part of -- the hottest week in Sea-Tac history. The weekly "honor" falls to August 6-12, 1981, where we rattled off a week of 86, 91, 93, 99, 98, 93, and 86, for an average high temperature of 92.3.

So far since Saturday, we've had a stretch of 86, 89, 94, 97, 103, and 96.  So if Friday's high temperature is 82 or hotter, we'll break the record.

OK, enough about heat. How about talk of some cooler weather?

Can do.

A push of marine air is finally building off the coast, revving up for a charge inland that is already under way as of early evening.

First of all, it'll cool us off quite rapidly this evening and overnight with a stiff seabreeze. So even though it was in the mid 90s around 5 o'clock across most of the Puget Sound area, by late evening, we should be considerably cooler. You might even get away with using natural air conditioning if you're up late and can man the windows once the breeze arrives. And low temperatures tonight will be in the low 60s, as opposed to the low 70s.

Second, it'll roll in a good layer of low clouds through the Strait of Juan de Fuca and Chehalis Gap, bringing a long-lost cloudy start to the morning Friday even to the Puget Sound area.

But the clouds will burn off by late morning, and once it does so, temperatures will quickly rise as the air mass in the higher altitudes remains quite hot. So high temperatures are still expected to be in the low-mid 80s or so around the Puget Sound region, perhaps even upper 80s farther away from Puget Sound.

The marine flow now stays with us for a while in varying degrees. The general air mass will remain quite warm into the weekend and early next week, so while typically we'd probably cool to the 70s in this pattern, we'll more likely still stay well into the 80s, but no more record-breaking heat foreseen through the extended forecast period. In fact, there are even some hints at a few showers toward the far end of next week.