Weds 25 April 2012 – PNW Migration Update

Locally the migration eased back a notch, downgraded to light with sustained periods of moderate flight.  The winds continue to be favorable in the area but weather is brewing to our north in advance of the approaching low.

Field reports from yesterday showed a sharp spike in observation density and diversity.  Vanguard Western Tanagers and Kingbirds have made it up into the area, more shorebirds are being noted, and i think all of the expected warblers have been accounted for.  I wouldn’t expect much turnover happened last night given the light returns on the radar last night.

Regionally there was only minimal flight in the Medford area.  They had some north winds to contend with so the birds may be just taking a break.  The Central Valley still had plenty of activity so these birds will be staging for their push over the Siskiyous.

Nationally the heavy action is all up the Central Flyway — in spite of a northerly flow in the northern half of the pipeline.  The Mississippi Flyway had it’s fair share of migrants as well as they had to contend with a pretty stiff cross wind.  The northeastern half of the Ohio Valley got cut off by some weather as did most of the Atlantic Flyway.  Even still, some local conditions contributed to spotty opportunistic flights through the night.

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.