Something Deep in the Pacific Is Reshaping California’s Weather. It May Not Stop Anytime Soon

A major ocean temperature index in the North Pacific has plunged to record low levels signaling a shift that tends to lock in coastal fog, delay California’s rainy season and reroute storms to the north.

This summer already bears the stamp of this setup. Around the Bay Area, mornings have been trapped in gray, afternoons unusually breezy, and inland heat has arrived in short, erratic bursts.