Posted by: woodcreeper | September 9, 2007 @ 6:29 am

Birds to the north, storms to the south


Basically southerly flow from Central Florida down to Cuba has kept anything from moving into or out of this area. To the north, winds overnight ranged from NW to E, and birds appear to have taken advantage of it (see the regional composite).

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. 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

For those of you still figuring out how to read the radar, this is a nice example of what birds DON’T look like. It’s also a good example of what weather, in this case some nice thunderstorms, do look like. Compare these images to the ones from last week and you should be able to differentiate between the typical “bird” signal, vs. the typical “weather” signal.

Alright NFLA birders- what’s going on up state??

Good Birding 🙂


  1. Happy Birthday, David! Things up here in the NC mountains are picking up. We use the Blacksburg, VA radar and there is steady increase in movement. Ground truthing at 5:45 AM indicates stronger flights, especially Swainson’s Thrushes. On Friday I had 15 warbler species in a small park, mixed with lots of vireos. A moderate front will stall to our south (SC) during the week, then a stronger front on the weekend with much cooler temps. I assume a large movement will ride behind the bigger front, but what do you (and readers) expect in South Florida during the stalled front? Thanks and also, thanks for reminding readers to observe what migrants *don’t* like in the way of weather. Great site as always!

  2. This morning (Mon Sept 10) we had a nice one at Cape Florida. Plenty of booty-rocking and massive consumption of worms. 60 birds banded! There was a band of rain to our south over the Keys during the night.

    Sept 9 was slow, with only 10 birds banded. There was a new influx of migrants that day brought down by the rain the night before, but it was small.

  3. please comment some time about
    where a list of “migration Traps” for
    Florida can be found.

  4. Fred:

    Migration traps in Florida:

    Key West/Dry Tortugas in Monroe Co
    Cape Florida(Key Biscayne) in Miami-Dade Co
    Ft DeSoto in Pinellas Co
    Ft Pickens in Escambia Co

    How much detail do you need and what region?



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