Posted by: woodcreeper | September 18, 2007 @ 5:53 am

Migration continues across the southeast


Hmmm…the radar looks interesting this morning, to say the least.
Here are the images from sunset last night through 5:00am 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 Key West, FL Base Velocity image from Key West, FL
Base Reflectivity image from Miami, FL Base Velocity image from Miami, FL Composite base reflectivity for the Southeastern USA
The regional composite shows birds moving over the entire state. Although most migration ends at about 2:00am, for the second day in a row we see birds making their way into the south Florida radars after the northern ones have shut down. The real interesting parts are the scattered thunderstorms which appear to cause some of the migration activity to cease in their immediate vicinity. I can see two distinct cells, one over the southeast coast (Key Biscayne? we’ll need Key Bunny’s balcony weather report for this one…) and a smaller cluster over the upper keys (Brennan, you out there?). Did it rain in your neck of the woods? The direction of migration looked fairly consistent at nnw–>sse, so birding along the east coast as well as inland sites such as AD Barnes should be good today. Okay…now I’ll sit here and wait for your reports.

Good Birding! 🙂


  1. It was a dark and stormy night……. Actually, it’s a dark and stormy morning, too. At 6:20 the cell you are watching is directly NE from Balcony Weather Observatory and producing rumbles. Radar shows that most of the birds over the ocean (earlier loop) have landed. We’ll let you know what’s around. Random cells produced rain last night, starting ~8:30 so perhaps some birds stuck around.

  2. Hmmm….. is right. Banding today seemed to be in direct proportion to the radar early this morning –> interesting but not outstanding like yesterday. The bus loads of redstarts motored out, since 3 were banded today compared to 39 yesterday. Michelle said the birds yesterday were in excellent condition so it seems like they found a way to dodge the showers last night. I guess until we get some west components, we’ll continue seeing the Caribbean migrants. Perhaps 93L will stir things up a bit. [I think Brennan is in Kenya leading a tour.]

  3. David,

    Why do you think the birds up in the Carolinas and Georgia didn’t fly all night the last couple of nights? Do they only go all night when they get a good tailwind? I can’t think of when I’ve seen this pattern of the northern migration shutting down before ours in Miami; usually it’s the opposite. Winds on the surface have been light and mostly easterly except today they were northerly and stronger than they have been because of that low getting going off the coast.



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