20 April 2015 — PNW Migration Update

Yesterday in the narrative we had twelve migrants yet to be reported in the Northern Willamette Valley.  To day we are left with eight.  Yesterday there were reports of Yellow-breasted Chat, Yellow Warbler, Hammond’s Flycatcher, Black-headed Grosbeak.  To our south in the Shasta area a Common Nighthawk was reported.

Great conditions, clear skies and a nice tail wind – BOOM!  Heavy migration last night, all night.  The loop says it all.

Take a look at the wind map and you can predict the scenario.  Northeast – shut down.  Mississippi and Central – pile up in Texas and continuation behind the weather.  Pacific – open for business.

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22 May 2014 PNW Migration Update

Migration in the region last night was a bit reduced from yesterday.  It could be the north winds were slightly stronger and it could be we are running out of birds.  Probably a little of both.  You can see the intensity dropping across the country.  With a second report of Nighthawks it’s pretty much what you would expect.

Next migration update is planned for Tuesday 27 May. I’m taking off for a long weekend.

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

22 May Base Reflectivity - Portland (KRTX)

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

22 May Base Reflectivity - Seattle (KATX)

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

22 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)