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.

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15 March 2017 – PNW Migration Update

Well, another night of rain.  The birds are still fighting to get north and picking their way through the gaps and along the edges.  The Hydrometeor sounding is the best way to see this so it is the loop i put in the gallery today.

I also put in a snap of the National Composite from Paul’s archive.  Really, the only activity is in Texas and the Central Valley of CA.  So, we’re not in a full blown race to the north yet — but soon.

 

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.

10 March 2017 – PNW Migration Update

Well,  The birds have been picking their way north for a few weeks now, but because of the nearly constant rain it has been damned hard to pick them out of the radar noise.  Even the HC was not reliably designating biological returns.

Last night however, once the rain moved through, we got a decent migration signature.  On today’s loop, wait for the rain to pass and you will see the flight — up into the 20 dBZ range.

Tree and Violet-green Swallows as well as Turkey Vultures have made it to the Portland area.  Even Barn Swallows are being reported in Clallam County in Washington.  Western Kingbirds are in the Central Valley in California as well.  Waterfowl numbers are down a bit too.

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.