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September 2012

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From:
Paul Hurtado <[log in to unmask]>
Reply To:
Paul Hurtado <[log in to unmask]>
Date:
Fri, 7 Sep 2012 23:29:50 -0400
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Hi everyone,

Go birding this weekend!  The weather forecast looks excellent for a big
push of migrants, and there might even be a chance to hear night migrants
if you happen to find yourself in the right place at the right time.

If you haven't already heard of the BirdCast project to forecast bird
migration events, check out the newly launched website
http://www.BirdCast.info/.  Here's their forecast for this weekend into
next week:

"*Upper Midwest and Northeast*
Warm moist air continues to prevail from Maine through the Ohio River
valley, keeping migration primarily light and scattered. However, a change
is on the way, with the western Great Lakes and upper Mississippi River
valley feeling the effects of a passing cold front and a strong area of low
pressure to the north. In areas to the west of this system’s passage,
movements will be heavy and locally very heavy. Birders in these areas
should watch carefully for landbird and waterbird fallouts, as rain
associated with the passing front will put down birds where it passes. As
this system moves east to end the weekend and begin the week, favorable
winds will overspread much of the region, spawning heavy movements and some
locally very heavy movements. These conditions continue through the
beginning of the week, gradually becoming more marginal as the system moves
into the Atlantic.  By Tuesday, areas east of the Appalachians continue to
have favorable conditions with continued moderate and heavy movements,
whereas areas to the west of the mountains will experience generally
lighter movements. In quiet areas where winds are light, birders should
listen flight calls as calling events should be widespread in many areas of
the region. By the end of the forecast period, high pressure builds in
coastal and offshore areas, bringing southerly winds and greatly diminished
movements to the entire region."

For links related to observing large migration events via weather radar,
and links to current radar images, see
http://people.mbi.ohio-state.edu/hurtado.10/US_Composite_Radar/

For a sense of what species might be arriving this weekend, here are
eBird's barcharts for all species ever reported to eBird in Ohio during
September over the past decade:
http://goo.gl/IP7We

Good birding,
-Paul

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