21 March 2017 – PNW Migration Update

Rain, heavy at times and easing up through the night.  Sigh.

There was a nice south wind, so anxious birds braved the weather and picked their way north.  Not in great numbers but fairly widespread as the weather would allow.  It’s tough to pick them out between the rain cells so we have the Hydrometeor loop today to aide in finding the birds; a little like finding Waldo.

American White Pelicans have been reported in the region, a few more Western Kingbirds and Osprey as well.  Ruby-crowned Kinglets are starting to sing.  It’s a wonderful song and we only get a small window in early spring to hear it before they clear the area as they head north to the breeding grounds.

Pacific Slope Flycatcher reported in the Central Valley is a first arrival.


14 March 2017 – PNW Migration Update

Birds continue to pick their way north; choosing their place and time between and in the gaps of the storm cells.  I put in the Hydrometeor loop today so it is easier to pick out the birds – look for the brick red biological returns.

Late this morning we see a pretty decent flight up the east valley once the heavier rain moves through.

20 October 2016 – PNW Migration Update

It might be the winds out of the south or it might be that we’re getting a little long in the tooth, but the migration last night was pretty weak.  Best action was up against the spine of the Cascades.

26 October 2016 – PNW Migration Update

Strong winds out of the south and widespread rain developing over night; pretty crappy conditions for migrants.  But at low levels, especially early in the evening, some birds were on the move.  Taking a look at both the Base Reflectivity and the Hydrometeor Classification loops we can see, even in adverse conditions, some birds continue to pound south.  Probably the strong flying waterfowl.

07 October 2015 – PNW Migration Update

It’ been a terrible week for migrants.  Rain and blustery south winds have conspired to keep widespread migration at bay.  Any movement has been low level.  We can pick this out using the Hydrometeor filter (brick red returns).  And all week has pretty much looked like the loop below.

A look at the wind map shows we may get a break this weekend.  That would be nice.  The wind map also shows the size and force of Matthew the Hurricane.

14 April 2016 PNW Migration Update

The wind is perfect for flight — strong and out of the south.  But there is just too much rain to get a sustained flight off the ground.

There was a nice break in the middle of the night and a decent, but moderate, flight organized.  I put up both the Reflectivity and the Hydrometeor loops today.  Look for the brick red Biological (BI) returns on the HC loop.

The low pressure system that is bringing this weather has organized and is pushed right up against the coast.  It should move through today and trail off to the east by tomorrow.  It looks like we may get a ridge coming in — nice weather but north winds on the leading edge.