Wednesday, September 25, 2013

Mega bird migration

Watch the bird migration at night.

The weather radar that detects rain can also detect birds. When there is no precipitation the operators set the radar in a very sensitive mode that detects birds. I don't know how to directly access the radar. But Cliff Mass of U of W captured the bird activity on Saturday, September 7. The birds mostly fly at night to avoid predators. He has a series of radar captures from the new Langley Hill radar near Ocean Shores, Washington, showing little activity before sunset, heavy activity at night, then a sharp drop at sunrise.

Cliff Mass describes this at his CM Weather Blog.

Here are a radar image before sunset and one only an hour later, after sunset. It's amazing the leap in activity. Images from Cliff Mass.

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