First image is of the winds aloft at 850 mb (approx 5000 ft). Winds over the state continue to be out of the north. We had 20 knot winds along the coast which could bring some more migrants into these areas. Inland the winds were light but out of the north.
Second image is a snapshot of the base velocity showing north to south directionality at a peak of 20 to 25knots, picking up 5 knots or so from the tail winds.
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 comparatively low last night. Even the Puget Sound area had light migration as can be seen in the regional composite below. I wouldn’t expect a noticeable influx of migrants except on the coast maybe.