Date: 9/10/17 6:53 am
From: Paul Sullivan <paultsullivan...>
Subject: [obol] Re: Barn Swallow fly-out Sunday morning
6:42 - a substantial green donut over the Willamette River east of Amity

6:45 - larger donut

6:49 - more birds toward McMinnville side of donut



From: Paul Sullivan [mailto:<paultsullivan...>]
Sent: Sunday, September 10, 2017 6:42 AM
To: <obol...>; <YamhillBirders...>;
<birding...>
Subject: RE: Barn Swallow fly-out Sunday morning



At 6:35 I see the first green dot

At 6:38 - bigger green dot with yellow center. The fly-out has begun.



Paul



From: Paul Sullivan [mailto:<paultsullivan...>]
Sent: Sunday, September 10, 2017 6:23 AM
To: <obol...> <mailto:<obol...> ;
<YamhillBirders...> <mailto:<YamhillBirders...> ;
<birding...> <mailto:<birding...>
Subject: Barn Swallow fly-out Sunday morning



I'm set-up to watch the fly-out of Barn Swallows from the Grand Island roost
this morning. Looking at the Weather Underground image of Portland radar I
see that the sensitivity of the radar is set to a broader range +5 dBZ to
+75 dBZ, so the lighter image of the swallows must compete with heaver rain
in the Cascades. However, it is not raining at Grand Island, so the radar
signature of the birds should be visible.



https://www.wunderground.com/radar/radblast.asp?zoommode=pan
<https://www.wunderground.com/radar/radblast.asp?zoommode=pan&prevzoom=zoom&
num=6&frame=0&delay=15&scale=1.000&noclutter=0&ID=RTX&type=N0R&showstorms=0&
lat=45.20659256&lon=-123.21671295&label=McMinnville,%20OR&map.x=400&map.y=24
0&scale=1.000&centerx=400&centery=240&showlabels=1&rainsnow=0&lightning=0&le
rror=20&num_stns_min=2&num_stns_max=9999&avg_off=9999&smooth=0&MR=1>
&prevzoom=zoom&num=6&frame=0&delay=15&scale=1.000&noclutter=0&ID=RTX&type=N0
R&showstorms=0&lat=45.20659256&lon=-123.21671295&label=McMinnville,%20OR&map
.x=400&map.y=240&scale=1.000&centerx=400&centery=240&showlabels=1&rainsnow=0
&lightning=0&lerror=20&num_stns_min=2&num_stns_max=9999&avg_off=9999&smooth=
0&MR=1



I see no birds at 6:09, 6:12, 6:16 or 6:20 AM. Waiting.



Paul Sullivan


 
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