31 March 2016 – PNW Migration Update

With the north winds abating as we move into the eye of the high pressure ridge the birds definitely took note.  The first set of “green doughnuts” across the region.  The game is ON!

Grasshopper Sparrows have made it to the San Diego area and Cassin’s Vireos are now in the Central Valley.


30 March 2016 – PNW Migration Update

Things are picking up across the region so i surveyed the PNW’s three radar stations and we had sizeable flights detected on each.

New to the area: increasing Barn Swallow and first Purple Martins.  The latter out on Sauvie Island.

29 March 2016 – PNW Migration Update

Continuing north winds probably hampered migration a bit, but not completely.  There was a nice push of birds in east Clark County probably originating from Steigerwald.

Looks like this ridge of high pressure may stick around for a while.  That will bring some much needed relief from the rain, but as long as it hangs in the Gulf of Alaska we will continue get these north winds aloft.

One glance at the Winds of the Earth and you can pretty much guess the Central Flyway and possibly the southern part of the Atlantic Flyway is set up for decent migrating conditions.

Black-headed Grosbeaks have made it to San Diego, Common Yellow-throat and Northern Rough-winged Swallows to the Willamette Valley.



28 March 2016 – PNW Migration Updare

As a high pressure ridge builds in the gulf of Alaska north winds are found across the region.  That put a damper on an otherwise decent night for migration.

We saw a very light movement last night.  but since i last checked in a number of migrants have made their way into the Pacific Flyway pipeline: Yellow Warbler, Common Yellowthroat, and Brewer’s Sparrow.


HERE is a great article by Kenn Kaufman on obligate migrants and facultative migrants that may be of interest to folks.  It is focused on his patch back in Ohio but it pertains to all migrants, even those that use the Pacific Flyway.

23 March 2016 – PNW Migration Update

Light migration last night with one pretty good pulse out in SW Washington County in the Hagg Lake area.  Which is kind of curious.

Because the movement was light and there were isolated rain cells moving through today i put in both the Reflectivity and the Hydrometeor loops.  It is an informative juxtaposition as it gives us a chance to train our eye when interpreting the returns on the Reflectivity loops.

No new birds to report today.  Well, Bell’s Sparrows and Hooded Orioles are up into the Central Valley but these are not going any further so i’ll just leave these out of the mix.

21 March 2016 – PNW Migration Update

Nothing to see the past couple of days because of the rain.  There were a few birds moving in between the rain cells but not many.

San Diego:
Western Kingbirds are now being reported

Central Valley:
Warbling Vireo

Willamette Valley:
Reports of increasing Violet-green, first Barn and Cliff Swallows, and more Orange-crowned Warblers

Let’s take a look at a snap shot of the national composite radar today.  The archived loop, as always, can be found on Paul’s Site.  The big action was up the Central and Mississippi Flyways:


19-20 March 2016 PNW Migration Update

Really nice movement over this weekend.

In San Diego:
More Pacific-slope Flycatcher, Bullock’s Orioles and Wilson’s Warblers.

Central Valley:
Black-throated Gray Warbler

Willamette Valey:
Orange-crowned Warblers, and a solid push of Violet-green Swallows.

I’m having problems uploading the loop from last night — i’ll try later.