14 Apr 2014 PNW Migration Update

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)

14 Apr Base Reflectivity - Portland (KRTX)

14 Apr Base Reflectivity – Gray’s Harbor (KLGX)

14 Apr  Base Reflectivity - Seattle (KATX)

Here is the grand view of the winds aloft from Earth:

14 Apr  Earth

Here is Paul’s archived National Radar Composite from yesterday.  Both coasts are jammed with birds and the mid-west sat last night out.  Check out the image from Earth above and all will be revealed.

And here are the weather maps (click on any image to bring up a full gallery view)