10. May 2026

Conditions looking good for coastal aggregation after midnight tonight (May 10-11)

Windy.com map above shows the forecast wind direction & speed at 3am tonight (May 11). Light wind to light southwesterly wind south of the lake are forecast to meet northwesterly to west wind over Lake Ontario. This is the most promising forecast this spring season for coastal aggregation flight, though the forecast conditions don't develop until after midnight. More analysis coming later today.

Windy.com map above shows conditions at 10pm are already looking good for coastal aggregation.

The warbler & sparrow numbers documented by the transect acoustic stations do not indicated that any coastal aggregation occurred on the night of May 10-11 (see data below).