A wide swath of rain associated with the low pressure to our south moved into the region last night, effectively cutting off a moderate flight into New Jersey. This cutoff occurred during peak migration, and appears to have centered over the middle of the state. Fallout conditions are expected. Here’s the radar from sunset last night through 5:00am this morning.

Frames are every 1/2 hour. Click on the thumbnail to view the full-sized animation.

A stationary front stretching across the Mid-Atlantic last night brought with it some moderate precipitation after midnight. Birds can be seen migrating prior to the arrival of precipitation, and densities southbound of the front appear to have been greatly reduced. This would suggest fallout conditions under the frontal boundary. Winds were northerly, and the trajectory of migrants was generally NE->SW, also suggesting that inland migrant traps would be favored.

Cold Brook Preserve, The Hutcheson Memorial Forest (Somerset, NJ), Princeton Institute Woods, Chimney Rock, etc. should all be holding higher densities of birds today. Further south, new birds will be present although more birds appear to have left than arrived due to the truncation caused by the front.

Good Birding

David