29 May 2014 PNW Migration Update

Some rather unstable weather, WNW winds, it’s late in the season …. and still there is a sea of feathers overhead.  Well, maybe just a puddle, but impressive none the less.

As the high pressure ridge builds in behind our recent low we can expect the winds to shift to a more northerly component, but the skies should clear.  So it will depend on the strength of the winds tomorrow night to determine the magnitude of the last covered flight of the season.  I’m hoping the winds are light and the sky is filled with the remnants of the feathered travelers.  The past few nights i have regularly heard the nocturnal flight calls of Swainson’s Thrush – it’s comforting, and brings a bit of joy to my world.

Before we take a look at the loops: “Message Date: May 28 2014 15:26:44 KRTX MAY HAVE PERIODIC DATA LOSS TODAY FROM 28/16Z THROUGH 29/02Z DUE TO AN AWIP S UPGRADE AT WFO PORTLAND.”

I have no idea what that means and i don’t really see any problems in the loop, but some more discerning eye might so, there you have it.

29 May Base Reflectivity - Portland (KRTX)

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

29 May Base Reflectivity - Seattle (KATX)

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

29 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.

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

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