Fri 27 april 2012 – PNW Migration Update

Locally the weather system has covered the area in clouds and occasional showers.  The radar was in precipitation mode all night.  Any birds with a strong enough itch to head north did so undetected.  We might be able to squeeze a few birds out of the images between the gaps in the clouds, but overall, flight was insignificant.  Besides, there is a strong westerly cross wind for migrants to deal with.

In the field reports are steady with perhaps a slight decrease in the number of individuals.  The Yellow and Hermit warblers are now accounted for.  An odd, but occasional, Gray Flycatcher was up on Mt Tabor.  With this current system in place the forecast has shifted by a day.  Depending on the conditions we may see a flight tonight but i would guess it to be pretty light.  It now looks like the low will pass through on Saturday and the winds will turn out of the north that evening.  So, im guessing weekend birding will be hunting for those migrants that are already here.  Numbers should be down as they will have had time to disperse.  We’ll see.

Regionally: the Siskiyou pass was completely devoid of migrant activity — not a bird in the whole region.  That is our main source of birds so that’s a bit discouraging for the weekend outlook. There was movement in the Central Valley of California but quite diminished.  Really, a sedate evening along the Pacific Flyway.

But oh to be along the gulf coast!  Nice southerly flows over the gulf, and up the east coast of Texas, dropped a butt-load of birds into region.  They are seeing returns up to 35 dBZ from Brownsville to Tallahassee.  Other migrants crept as far north as they could.  North winds in the East and weather in the Plains provided discouragement across most areas east of the Mississippi.  There was just a small window of opportunity from Minnesota south and we see some migration taking place in that narrow window.

For migration updates in other regions check-
Michigan’s Upper Peninsula – The Northwoods BIRDAR by Max Henschell <- NEW this season!
New England – Tom Auer’s blog
PA/Ohio Valley – Nemesis Bird by Drew Weber
NW Ohio – Birding the Crane Creek by Kenn Kaufman
Arizona – Words About Birds by Tim Schreckengost <- NEW this season!
Florida – Badbirdz Reloaded by Angel and Mariel Abreau
Continental US – eBird BirdCast Forecast & Report by Team eBird

Also under NEXRAD Trackers in the sidebar to the right.