Over the weekend the high pressure system parked out in the Pacific kept winds out of the north. They weren’t particularly strong and movement north took place but at a lackluster pace.
Now that the next low trough is moving in it’s leading edge is drawing wind up out of the south and that is a much more favorable set of conditions. And, last night’s radar bears witness. Solid heavy, 20+ dBZ, migration across the region. Migrants are arriving a wee bit earlier than the norm. Cassin’s Vireo, Nashville Warbler, Vaux’s Swifts — all being reported from the area. Duck numbers continue to dwindle and the geese are thinning out a bit.
Pacific Northwest Radar: (Click on the links below to open the .gif files in a new window)
Here is the grand view of the winds aloft from Earth:
And here are the weather maps (click on any image to bring up a full gallery view)