Warm Ending

Calmer weather on the charts, for the time being.  Let’s do the Monday morn’n sip.  Mug ready?

Marine morning cloud deck will remain in play much of this week.  Onshore flow, driven by a weak Low pressure trough hanging west of the Olympic Range, will be the reason.  Odds are that the Puget Sound may not clear off completely until Thu, when that Low finally shifts south down the coast, just west of OR.  

The pattern charting for late this week is similar to the one last weekend, although not as strong.  Position of the Low will train moisture north over western OR & SW WA (maybe farther north, too) with increasing chance for thunderstorms & showers beginning late Thu or overnight into Fri.  (Grass seed growers may not be too pleased — too much moisture).  Expect cloudiness & showers to end the week; mild temperatures - pegging a bit below average for late August.  East side - possible thunderstorms/showers, even into ID.

The coming weekend:  clearing, south-to-north, warmer too.  However, another pesky weak Low may hold close to Vancouver Island, keeping cloudiness and cooler temps in play for NW WA & southern BC.  Not much enough moisture is charting for notable showers, just unseasonably mild and mostly cloudy.  For OR & ID & northern CA, the weekend will be fairly decent and warming each day.  In fact, the upper-level pattern is adjusting to set up the next HEAT UP to end the month, as expected.

Week of Aug 26-30 is trending dry and warm-to-hot, esp by the end of the week.  A weak shot of cooler marine air may hold temps down over the Puget Sound early on, but all of the PNW likely to turn summer-hot by the end of the week.  90s probable in many locations.  Just in time for Labor Day weekend.

Labor Day weekend:  Dry, sunny, rather warm on Sat; Sunday may present mid-level moisture training north from California, ushering in the threat for a thunderstorm, esp along the Cascades.  This is still iffy; however, Sunday & Labor Day should be a bit cooler, with plenty of sunshine to initiate September 2024.

Showers possible to start the post-holiday week, Tue Sep 3.

Bottom line: generally cooler than normal through the balance of August, with a heat-up possible after the 27th.

From the ’Net:  The adult version of "head, shoulders, knees and toes" is "wallet, glasses, keys and phone”.