[TN-Bird] Setup for a mini-fallout?

From: Bill Pulliam <bb551@xxxxxxxxxxxxx>
To: tn-bird Birds <tn-bird@xxxxxxxxxxxxx>
Date: Thu, 8 Apr 2010 00:29:32 -0500
It's early in the season to expect a whole lot of species diversity  
from this, but the weather is creating potential migrant fallout  
conditions tonight over much of middle Tennessee.  A rain shield and  
windshift is moving slowly across the region from northwest to  
southeast.  In advance of this line the winds are strong and  
southerly and the weather radar indicates a pretty heavy northward  
movement of night-migrating passerines.  As the squall line arrives  
the birds will be grounded by the rain and northwesterly winds; the  
rain shield behind the squall line will keep them grounded for the  
duration of the night.  In spots you can actually see on the radar  
the pileup of headwind-fighting birds at the gust front just in  
advance of the rain; they'll call it quits and land pretty quickly.   
The geometry isn't perfect for a major pileup, but it might produce  
some good concentrations of grounded early spring migrants for a bit  
until the weather clears, the wind turns, and they can continue on  
their way.

Bill Pulliam
Hohenwald TN
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[TN-Bird] Setup for a mini-fallout?

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