A drastic change in our forecast will prevail Thursday through Friday as temperatures cool down to below average. As the marine layer returns this will bring night through morning lows clouds along the coasts and valleys on Thursday and Friday morning. Gusty northern winds will be possible at times late Thursday into next week. Daytime highs will warm through the weekend before cooling down slightly into next week.
As the Santa Ana winds diminished this lead to a cool down on Wednesday. Although lingering offshore gradients allowed temperatures to remain warm in the 70s to 80s, staying above average by 5 to 10 degrees. Due to an upper low near Baja, California there were some mid to high level clouds, with more low level clouds ahead.
Onshore flow will strengthen significantly through Thursday afternoon. This will help the marine layer get stronger and push low level clouds across the interior valleys through the morning. This will lead to further cooling where many coastal and valley areas could fall 5 to 8 degrees below average. Daytime highs are expected to warm in the low to mid 60s on Thursday and Friday.