First image is of the winds aloft at 850 mb (approx 5000 ft). Winds over the state were mainly out of the east with an offshore flow at about 10 to 15 knots.
Second image is a snapshot of the base velocity showing north to south directionality at a peak of 20 to 25knots.
Third image is an animated gif with snapshots every half hour of the base reflectivity above radar station RTX. Animation runs from around 8:00 pm pdst yesterday evening through 5:00 am pdst this morning. (Click on the thumbnails to view the full-sized images and animation.)
Sunset last night was at 7:49 pm pdst.
Density was low last night, but apparent.
As an aside the east winds could set up the right conditions for dragonfly “migration” along the coast. Specifically the Variegated Meadowhawk (Sympetrum corruptum) “migration”.