A very interesting radar tonight (11 pm). It shows a concentration
developing along a cold front (shown on the regular weather map) through
southern Ohio and central Indiana where the wind shifts from a southerly
direction to a northerly one.

I think this site shows the current conditions when you access it.

http://lnk.nu/rap.ucar.edu/eja.php

To get conditions for any time tonight go to
http://www.rap.ucar.edu/weather/radar/

and enter 0300 (for the time I have right now - 11 pm) or later, to see
what is happening then.

You can see the effect by clicking on "Contiguous US" but it is striking
if you check "Regional reflectivity" at the left and ILN in Ohio.
You can set the time in motion be setting the loop duration to the number
of hours you want.

If this front happens to push back north, it should have lots of birds
behind it. however, the prediction is not until Tuesday. I don't know
what the bird psychology is at this time in May, but perhaps they might
gradually push onward.

Rich

Richard Cressman
Columbus OH
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