Date: 9/10/17 6:53 am
From: Mary Garrard <springazure1...>
Subject: [obol] Re: [birding] RE: Barn Swallow fly-out Sunday morning
I missed the first couple updates because I didn’t quite know where to look, but now I’m seeing a huge green donut. Staggering!


Mary





> On Sep 10, 2017, at 6:42 AM, Paul Sullivan <paultsullivan...> wrote:
>
> 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...>; <YamhillBirders...>;
> <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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