9. May 2026

Looks like a coastal aggregation flight is possible tonight (May 9-10) after midnight [edit: after 2am].

There has been no major coastal bird migration aggregation to report since the flight of April 28-29. But the forecast tonight is looking similar to April 28-29 -- a cold front sweeping across the coastal plain of Lake Ontario in western New York between 1am-2am. Rain and T-storms before the front should pass the transect stations by 10pm, then a period of light rain and southwesterly winds will occur until winds switch to northwesterly by 2am. There is likely lo be some coastal aggregation, but it is difficult to predict the magnitude due to uncertainties in the how many birds will be aloft in the region after and amidst the waning light rain. Night flight call activity at Braddock Bay Bird Observatory after midnight will be a key indicator. See early Windy.com wind speed and direction forecast maps below -- blue areas are precipitation forecasts.

1am forecast from Windy.com (made at 10am)

2am forecast from Windy.com (made at 10am)

At 8pm, the Windy.com forecast map is about an hour behind what it forecast this morning. Now it shows the front sweeping across the transect between 2-3am. See map below:

2am forecast from Windy.com (made at 8pm)

The map above shows delayed progress from this morning's forecast. Also, there is now a substantial area of light rain to the south of the transect. This all would seem to diminish the size of a coastal flight tonight if one develops..

Table above shows hourly warbler and sparrow call totals at active stations on the night of May 9-10.