Saturday, July 24th, 4:15 A.M.
It’s a mild & clear start to the day inland, and cloudy along the coast. Expect the marine layer to gradually burn off by lunchtime along the immediate coastline. Meanwhile to our southeast, high pressure is slowly building in, and will bring us hot conditions inland today. Afternoon highs will reach the upper 80s and low 90s across the metro area, and could be a degree or two warmer toward the central Willamette Valley. Today should be the hottest day over the next several days.
High pressure will back off a bit as we kick off the workweek. As it inches eastward and amplifies to the north, we will find ourselves along the western periphery of the ridge. This will bring southerly flow through the Pacific Northwest, ushering in some monsoon moisture from the Southwest. High temperatures will gradually dip back into the mid to upper 80s, and we’ll likely see mid and upper level clouds streaming overhead. In addition, it’ll probably feel a bit more muggy due to the subtropical air mass streaming in. The increase in moisture, combined with a weak disturbance passing through the region, could fire off some isolated thunderstorms along the Cascades. The best chance for that will be between Monday night and Tuesday. It’s tough to pinpoint where that activity may occur. We’ll get a better handle on that part of the forecast by the end of the weekend.
The same ridge (or heat dome) that was mentioned earlier will inch westward over the interior Northwest between mid to late week. As a result, we will see significant warming across the entire region. Metro area highs will likely climb well into the 90s Wednesday through Friday. Thursday through Saturday should be the warmest stretch, with highs in the mid to upper 90s.
Have a great weekend!