Flight: 8:20 pm

28 mins after sunset (about at dark) ~59% of the colony flew – some went 6 miles WSW while most went 12 miles SSE (~39% of them went to altitude) on NE Winds at 8 mph – had been northerly 9-17 mph all afternoon with gusts to 22 mph around 6:30pm, A Few Clouds, Temp 90°F, Dew Point 61°F steady, 19 Cooling Degree Days, Cloud Base 6612′, RH 38% rising, Heat Index 90°F, BP 29.92 steady, sea level pressure 1012.1 mb rising, bats viewable until 10:37 pm under streetlights