Southerly winds keeping the birds down


No migration was evident on the radar last night, but I figured I’d throw in the animated loops since you’re probably going through a bit of withdrawal. Here’s the radar from sunset last night through 5:30am this morning.

Frames are every 1/2 hour for reflectivity and velocity, and every hour for the regional composite. Click on the thumbnail to view the full-sized animation.
Base Reflectivity image from Fort DixBase Velocity image from Fort DixBase Reflectivity image from Dover AFBBase Velocity image from Dover AFBComposite Base Reflectivity image from the Northeastern USA

As you can see on each velocity plot, all activity is moving from N–>S and at speeds consistent with the prevailing winds last. Based on this, we can rule out any nocturnal bird migration. Interestingly, we saw similar patterns on yesterday’s radar…but Don Freiday reported a decent flight of a few species including American Robin, Eastern Meadowlark and Yellow-rumped Warbler…which begs the question as to whether these were birds that had already been local and decided to move in the early morning, or if they simply “came through under the radar” and were actually migrating undetected on Sunday night. It’s interesting, and just goes to show that the radar is a course tool that must be ground-truthed, so thanks again to those of you who regularly post your observations.

P.S. Come check out my migration forecast for the Mid-Atlantic on Birdcapemay.org

Membership in the Woodcreeper/Badbirdz flock is growing! So far most new members hail from my homestate of Florida, but a few Jerseybirders have joined the club. Remember, membership has its privileges, so read the Become a Member post to find out more and become a member today!

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One response to “Southerly winds keeping the birds down”

  1. Quick report on Mon. 10-22-07 Rutgers Cook College co-op garden and grassland area : 20+ Palm Warblers , 4 Fielid Sparrows, 1 Eastern Pheobe, Coopers Hawk , 20+ Song Sparrows

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