Flight: 8:22 pm

21 mins after sunset (~7 minutes before dark) ~43% of the colony flew – some went 6 miles SSW while most went 12 miles SE (~44% of the total went to altitude) into E Winds at 7 mph – had been Light & Variable most of the afternoon, A Few Clouds, Temp 91°F, Dew Point 62°F steady, 19 Cooling Degree Days, Cloud Base 6612′, RH 38% rising, Heat Index 92°F, BP 29.96 rising, sea level pressure 1013.4 mb rising, bats viewable until 11:19 pm under streetlights