20 October 2015 – PNW Migration Update

Well, yesterday’s flight along the Washington coast went undocumented on the Washington listserv.  Perhaps today’s heavier flight will garner a comment or two.  But it is the middle of the week and the area is not heavily populated.  Today’s flight along the coast was no doubt aided by the ridge of high pressure that has sneaked in bringing a nice northerly flow – stronger along the coast.

Oregon’s flight last night was anemic but birds are still crossing the Straight in heavy numbers.  The Puget trough and western Cascades in Washington had a decent flight late into the evening.

Well, the first Buffleheads are being reported,  Swans will be next; that’s usually when i shut down for the season.

So, here it is, your moment of zen:



19 October 2015 – PNW Migration Update

Moderate flight last night with a large outflow from Clackamas County south early in the flight.  Some inflow, mainly in the east Counties again.

An interesting flight shown on the LGX (Gray’s Harbor) radar last night.  Not a heavy flight but two distinguishable movements.  The first out of the Waatch Valley down to Gray’s Harbor and then later a crossing from Vancouver Island over to Neah Bay, through the Waatch Valley and down to Gray’s Harbor.  I’d be very interested to find out what these flights were composed of.  I suspect a large flight of Geese or Ducks mostly comprised of a single species.  I’ll scan Tweeters tomorrow for clues.

Looking at the Wind Map one would expect limited flight down the Central Flyway given the strong southerly flows.  A quick glance at the National Radar Composite confirms the interaction of weather and migration.

Here it is, your moment of zen:

14 October 2015 – PNW Migration Update

Now this is more like it!

A ridge of high pressure off the coast cleared the skies and brought light, but northerly winds. And, hot damn, the birds took advantage across the Pacific Northwest.  I put all three radar loops in today’s gallery; RTX – Portland, ATX – Seattle and LGX – Gray’s Harbor.  All show heavy and widespread migration taking place.

Of particular interest is the LGX loop.  Note how the migrants take off from Makah Lands around Neah Bay and stream south.  It’s no wonder why that area is receiving a lot of attention from birders the past few years.

Nationally: take a look at the Wind Map and one would guess that migration would be hampered in the Northeast and aided down the Central and Mississippi Flyways.  And the National Radar Composite confirms that suspicion.

Good day to be a bird on your way south.