Temperatures are changing very little across the region with coasts in the upper 60s to low 70s and interior areas in the 70s to the 80s degrees.
With increased onshore flow, the marine layer is thicker and extending to valleys. The ridge is starting to budge south.
Onshore flow will continue to increase Friday and the ridge of high pressure will break apart. An upper low in the Pacific Northwest will cut off and approach our region.
The upper low will move over California Saturday, bringing the coolest temperatures of the week at near or slightly below average. A deep marine layer will extend to mountain slopes, with a small chance of mountain and foothill drizzle.
Temperatures start rebounding Sunday with decreasing onshore flow through early next week.