Another slow night

Drew WeberMigration Update, Predictions2 Comments

Regional Overview

There was little movement last night as south winds dominated. We’ll have to wait until the weekend for these conditions to change around to north winds so we can get another fresh shot of migrants. There is an impressive cold front bringing storms across the central part of the country; once these storms reach us things should change around and we should get more migrants.

I don’t always have time to comment on the radar in each state. To interpret it yourself, read the quick tutorial at the bottom of the page.

New York

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Pennsylvania & New Jersey

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In the eastern half of PA and over NJ there was a slight hint on the velocity radar of light southward movement against the wind. There may be a small influx of new birds.


Ohio

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Ohio prediction coming soon…


Maryland and Delaware

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Prediction coming soon…


Quick guide to interpreting the radar

On the top row (reflectivity radar), the images show the magnitude of migration. When birds are migrating, it looks like a donut shape around the center of the radar station.

The bottom row is the velocity radar. This shows the direction that the objects detected by the radar station are moving. Blues are moving towards the radar station, yellows and reds are moving away from the station. So for southbound migration, blue should be on the top half of the donut, yellow on the bottom half.

Watch for precipitation moving through during the night hours, this can cause birds to stop migrating in a concentrated area, creating the fabled ‘fallout’, particularly on nights with strong migration.

For more in depth info, watch this video.
For migration updates or other regions check-

Pac NW – Birds Over Portland by Greg Haworth

I need your help! These reports will only be as good as the feedback I get on these updates. Please leave comments on interesting patterns of migration you are seeing in the field so I can incorporate some ground truthing to my forecasts and predictions. Thanks!