First image is of the winds aloft at 850 mb (approx 5000 ft). As the low front slides to the north the winds are turning more from the WSW.
Second image is of the surface winds and pressure. Lighter than aloft and with the same trajectory.
Third image is the animated gif with snapshots every half hour of the base reflectivity above radar station RTX. The radar was in precipitation mode last night. A small flight can be seen behind the major precipitation as it moves off to the NE. A second round of rain dissipates as it crests the Coast Range and only the stronger of the cells pushes into the area. But they were enough to put the birds down so they will be in the area.
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 6:47 pm pdst.