As earlier noted, a significant West Coast heatwave will build in the coming days, persisting at least 7-10 days. A strong & at least somewhat persistent ridge will bring war-to-hot conditions West Coast wide. Heat will be most anomalous in PacNW, but will also be present in CA.
ALT Surface temperature anomaly map showing predicted pattern in about 1 week from present (using data from the ECMWF ensemble). It shows a broad region of much above average temperatures across most of the U.S. West coast and points inland.
ALT 500mb GPH anomaly map showing predicted pattern in about 1 week from present (using data from the ECMWF ensemble). It shows a large, broad, and persistent ridge centered in the Pacific Northwest.