Storms shut migration down

Drew WeberMigration Update, PredictionsLeave a Comment

Regional Overview

Storms and southwest winds combined to create conditions not conducive to migration. All the reflectivity radar images showed little to no detectable movement, while the velocity radar showed everything that was detected moving north, so there were likely very few birds in there.

Tonight could see the winds switching around and coming from the north which may spur on another flight. Winds tonight will be mostly from the west and it will be quite breezy so the birds may not decide to fly. Check back tomorrow morning to see!

 

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

Click on the thumbnail to view the full-sized animation.


Pennsylvania & New Jersey

Click on the thumbnail to view the full-sized animation.


Ohio

Click on the thumbnail to view the full-sized animation.

Ohio prediction coming soon…


Maryland and Delaware

Click on the thumbnail to view the full-sized animation.

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!