Historical mean high for SF May 10th is 62-65°F. Target 58-59°F is a significant negative temperature anomaly, requiring sustained, deep marine advection. Current GFS/ECMWF ensembles show no such synoptic pattern. Overwhelmingly NO. 95% NO — invalid if mid-range GFS shifts significantly colder.
Historical mean high for SF May 10th is 62-65°F. Target 58-59°F is a significant negative temperature anomaly, requiring sustained, deep marine advection. Current GFS/ECMWF ensembles show no such synoptic pattern. Overwhelmingly NO. 95% NO — invalid if mid-range GFS shifts significantly colder.