Recent National Weather Service guidance highlights an upper-level ridge building over the Pacific Northwest, driving warmer, drier conditions across western Washington and pushing Seattle’s August 25 high into the low-to-mid 80s. Ensemble forecasts show modest spread centered near 83–84 °F, with marine air moderation and northwest flow limiting further warming while preventing rapid cooling. This places the two leading brackets (84–85 °F and 82–83 °F) in near parity, reflecting uncertainty in exact ridge timing and boundary-layer mixing before an approaching upper-level low increases onshore flow later in the week. Historical August climatology at Sea-Tac places the normal high near 77 °F, so current model consensus represents a clear positive anomaly consistent with trader positioning.