Saturday, August 9, 2025 · Congress Avenue Bridge · Austin, TX
-15 minutes after sunset (just before dark with the hazy sky) ~25% of the colony flew – most went 10 miles SSW while some went 6 miles N (~31% of the total climbed E to altitude) on SE Winds at 9 mph – had been SE 7-13 mph most of the afternoon with gusts to 21 mph around 6:30pm, A Few Clouds, Temp 91°F, Dew Point 68°F rising, 22 Cooling Degree Days, Cloud Base 5244, RH 47% rising, Heat Index 95°F, BP 29.90 rising, sea level pressure 1011.1 mb rising, bats viewable until 10:19 pm under streetlights
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