Posted by: woodcreeper | October 5, 2007 @ 5:43 am

Migration over South Florida


Bands of thunderstorms kept birds out of the sky over northern Florida, while more favorable conditions to the south allowed for some southbound migrants to make their way into and out of the peninsula. Locations along both central coasts seem to have experienced a small amount of migration as well, with some interesting signals from the Fort Desoto area. Here’s the radar 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

Surface winds were generally out of the ENE for most of the state last night, while upper level winds turned more northerly. Birds do appear to have left the Melbourne area after sunset, albeit in small numbers, and headed SW. Over the Tampa radar (including Fort Desoto) it appears that birds headed to the west, and were intercepted by a band of thunderstorms. It’s possible that this event could cause localized concentrations of birds at Fort Desoto or nearby locales (wherever heavy rain was present). Birds can also be seen moving over south Florida throughout the night, as well as making the jump from the peninsula into the upper and lower Keys. No birds are seen leaving the Keys for Cuba. With easterly winds persisting, birding conditions on the east coast will likely be sub-optimal, while interior locations will have the best chance of producing good birds.

Good Birding! 🙂



  1. “birding conditions on the east coast will likely be sub-optimal”

    Bingo! You nailed this one, David. We banded 4 (!) birds this morning and even our pet Hooded Warbler abandoned us.


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