A robust Pacific ridge or inland thermal trough can readily push Seattle past 72°F in May, despite average highs being lower. The synoptic setup for significant thermal advection has strong potential. 65% YES — invalid if 500mb pattern remains strongly zonal past D-5.
A robust Pacific ridge or inland thermal trough can readily push Seattle past 72°F in May, despite average highs being lower. The synoptic setup for significant thermal advection has strong potential. 65% YES — invalid if 500mb pattern remains strongly zonal past D-5.
