It is going to be very hot today...in fact, several degrees warmer than some of the forecasts. Many locations in western Washington will get into the mid-90s.
A number of stations...such as Sea Tac...are running ten degrees above yesterday (Sea Tac got to 86 yesterday). The profiler at San Point (Seattle) shows easterly flow aloft and temperatures of roughly 6 C (11F) warmer than yesterday (see plot)
So head for the water if you want to be cool. A good place...the Oregon coast. Stratus and southerly winds have pushed northward up the coast behind the thermal trough, which now is over western Washington (see graphic).
Big contrasts in temps along the Oregon coast (see below)...50s south and near 70F at the WA border at 9 AM...