06 May 2014 PNW Migration Update

As a weak high pressure ridge squeezes in between well organized lows were getting NNW winds.  But not particularly strong.  Just enough to put a damper on full blown flight.  So, the region saw moderate but sustained movement throughout the night.

Before we take a look at the loops and maps, here is an item anyone looking at this blog would be interested in.  One of the Pacific Northwest’s birding luminaries, David Irons, has put together an excellent narrative: A Spring Migration Phenology for Western Oregon.
David obviously put a lot of time into this work.  It’s well done and worth the read.

Pacific Northwest Radar: (Click on the links below to open the .gif files in a new window)

06 May Base Reflectivity - Portland (KRTX)

06 May Base Reflectivity – Gray’s Harbor (KLGX)

06 May Base Reflectivity - Seattle (KATX)

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

06 May Earth: WPD at 850 mb

Here is Paul’s archived National Radar Composite from yesterday. Look at the wind map, and then the radar. All will be revealed.

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

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