Western Wood Pewees and Bullock’s Orioles are now being reported in Oregon. San Diego has it’s first report of Swainson’s Thrush. No reports of Willow Flycatcher yet.
As a guide to spring migration phenology I have a page in the top banner with a calendar. And at the bottom of that page is a link to a very good narrative written by David Irons. HERE is a direct link to his work, and it is really worth the time.
Pretty solid movement across the region last night. The high pressure ridge is weakening and winds, while not favorable were very light. The Atlantic Flyway was really lit up last night, probably it’s best this season. Well, all Flyways were very active, the Atlantic just stood out to me. Lots in the gallery today.
Cliff Swallows have made it to Oregon, but not much else.
A decent movement up the valley was noticeable last night, and that was into the wind. So, the urge is building. Since we’re not getting reports of spring migrants these probably continue to be waterfowl re-positioning and staging for the push north.
I looked at the Seattle radar (ATX) and there wasn’t any noticeable movement.
Base Reflectivity – RTX
Winds of the Earth
Update: Cool composite radar from last night! Note the bloom in Southern Georgia (Moody AFB, GA (KVAX)) and how the weather band puts the birds down.
The slowing of migration continues. In fact it is barely noticeable in the Portland area. So we’ll take a look at the ATX (Seattle) radar where the migration returns are more pronounced, especially across the Strait.
Message Date: Oct 05 2017 16:24:38
The Portland National Weather Service Doppler Radar will be down periodically fo
r routine maintenance until around noon. PT 10/05/2017 924 am PDT 1624 UTC.
Message Date: Oct 06 2017 00:09:15
Doppler radar KRTX, serving NW Oregon and SW Washington, will be out of service
for unscheduled maintenance. A return to service is unknown at this time, but is
expected to be Friday.
I’m not seeing any new reports except a Palm Warbler invasion along the coast. I have noticed a sizable increase in pink-footed gulls around the metro area however.
The Seattle radar shows the same pattern as yesterday; good movement across the Strait, probably duck outflow from Nisqually, and use of the western flanks of the Cascades. We haven’t really had any spectacular “green doughnut” days this fall so let’s take a look at Duluth MN to remind us of what that looks like.
Base Reflectivity – ATX (Seattle)
Base Reflectivity – DLH (Duluth MN)
While poking around Twitter i came across a very interesting abstract that may be of interest: HERE.
Innovative Visualizations Shed Light on Avian Nocturnal Migration
A bunch of science types put together an open source visualization package that ends up with something like this:
Pretty cool! Maybe i can figure out how to use this research. But not this year, maybe a winter time project.