Last weekend, many of us in the Central Valley were sweating with widespread temps above 100 degrees and several extreme heat warnings. It was as if summer was officially here a week early.
This weekend, as summer officially arrives Sunday at 1:24 a.m., temperatures are much more manageable if not downright pleasant.
This is all thanks to an upper level trough — an area of lower air pressure further up in the atmosphere — that has been spinning off the north coast of California the past few days. Folks along the coast have felt this as a deep, persistent, cloudy and breezy marine layer that has kept some spots on the west side of San Francisco into the 50s these past few days. This trough has been slowly eroding the ridge of higher pressure that brought us our scorching temps last weekend — it is why the week has been feeling progressively nicer for folks in the valley.…