While today's rapidly deepening cyclone off the West Coast is impressive (not shown), Sunday's rapidly deepening cyclone is even more so. GFS forecasts valid 0Z 10/25 reveal <−6σ MSLP anomalies near the cyclone center and >4σ PW anomalies over CA (assoc. w/ needed precip). #CAwx pic.twitter.com/D5iz10XCkT

— Dr. Alicia M Bentley (@AliciaMBentley) October 21, 2021