I’m pretty excited about the upcoming weather pattern. A big ridge of high pressure is developing over the Eastern Pacific this evening. It strengthens and moves over the West Coast the next 48 hours. Long range GFS, ECMWF, & Canadian models all show the ridge persisting over or west of us all through next week. Easterly flow develops by Saturday morning and continues through Sunday. This should easily pop our afternoon temperatures up about 20 degrees. Record high temperatures at PDX are in the 90s until midweek, and still over 88 after that, so I don’t think we’ll be breaking any records. Another reason we won’t get REALLY warm is that the ridge is never really forecast to be directly overhead or just to our east. That would give us warmer air aloft. There is also no sign of a marine airmass anytime in the next 7 days, which leaves us with no morning clouds & sunny skies.
Although it’s obviously a very boring pattern for forecasters and fellow weather enthusiasts, it’s great for getting end-of-season activities done (like painting the eaves of my house). Also, easterly wind should make to the Coast at least 1 and maybe both days this weekend. If so, 75-85 is a good possibility…Mark