when conditions allow, i.e. when the atmosphere is stable, no pressure drops, no strong wind or rain in the area, If conditions look good (low or no wind), get there early! The Congress bat pups have been flying for about 6 weeks now, so flights can be great nowadays, especially if a front moves through that stirs up insect activity. However, flights are normally diminished with a Waxing Gibbous / Full moon.
Sunset: 7:46 pm Dark: 8:16 pm (10-20 min). earlier if cloudy) Sunrise: 7:11 am
Saturday September 6, 2025
Flight: 8:10 pm
23 mins after sunset (at or after dark on a Mostly Cloudy evening) only ~23% of the colony flew 8 miles SSE on N Winds at 9 mph – had been N 9-17 mph all afternoon with gusts to 23 mph around 12:30pm, Mostly Cloudy, Temp 79°F, Dew Point 69°F steady, 16 Cooling Degree Days, Cloud Base 2280′, RH 72% rising, Heat Index 82°F, BP 30.002 rising, sea level pressure 1015.6 mb rising, bats viewable until 9:41 pm under streetlights
Friday September 5, 2025
Granger (KGRK) continues offline, rain moving E across the upper Hill Country, Bracken 0:50, Frio 0:58, SanMarcos SMCenterpoint Lockhart CanyonLake NewBraunfels SCUCISD TX28 SchertzClemens 1:08, OldTunnel 1:10, Wimberley 410&IH35 BalconesHeights FtSam 1:14, Dittmar 1:18, Congress(only ~18% of the colony flew 4 miles NNE) 1:20, other fights suppressed or readings confounded by weather
when conditions allow, i.e. when the atmosphere is stable, no pressure drops, no strong wind or rain in the area, If conditions look good (low or no wind), get there early! The Congress bat pups have been flying for about 6 weeks now, so flights can be great nowadays, especially if a front moves through that stirs up insect activity. However, flights are normally diminished with a Waxing Gibbous moon.
Sunset: 7:47 pm Dark: 8:17 pm (10-20 min). earlier if cloudy) Sunrise: 7:10 am
Friday September 5, 2025
Flight: 8:12 pm
24 mins after sunset (about at dark on a Partly Cloudy evening) only ~18% of the colony flew 4 miles NNE on SW Winds at 10 mph – had been southeasterly 7-13 mph all afternoon with gusts to 20 mph around 2:30pm, Partly Cloudy, Temp 93°F, Dew Point 64°F rising, 21 Cooling Degree Days, Cloud Base 6612′, RH 38% rising, Heat Index 95°F, BP 29.83 rising, sea level pressure 1009.0 mb rising, bats viewable until 9:49 pm under streetlights
Thursday September 4, 2025
Granger radar offline, Bracken 1:02, Frio Stuart 1:12, SMCenterpoint SchertzClemens TX28 1:16, SanMarcos SanPedro Camden Seguin SMRB(Slayden) 1:24, OldTunnel Chiroptorium Dittmar SaladoCreek&MLKdrive 1:30, SmythCrossing FM1572 Fern SanAngelo GrapeCreek 1:36, Huber Crestwood&IH35 CongressScouts 1:38, NuecesRR 1:42, Congress(only ~22% of the colony flew – some went 12 miles WNW while most went 10 miles NE) 1:46, FosterRd 1:50,
when conditions allow, i.e. when the atmosphere is stable, no pressure drops, no strong wind or rain in the area, If conditions look good (low or no wind), get there early! The Congress bat pups have been flying for about 6 weeks now, so flights can be great nowadays, especially if a front moves through that stirs up insect activity.
Sunset: 7:48 pm Dark: 8:18 pm (10-20 min). earlier if cloudy) Sunrise: 7:10 am
Thursday September 4, 2025
Flight: 8:38 pm
Scouts: 8:30 pm
49 mins after sunset (way after dark) only ~22% of the colony flew – some went 12 miles WNW while most went 10 miles NE on S Winds at 5 mph – had been southerly 5-8 mph most of the afternoon, Mostly Cloudy, Temp 90°F, Dew Point 55°F rising, 18 Cooling Degree Days, Cloud Base 7980′, RH 31% rising, Heat Index 88°F, BP 29.77 steady, sea level pressure 1007.0 mb rising, bats viewable until 10:09 pm under streetlights
Wednesday September 3, 2025
Bracken 1:02, Frio Stuart Fern 1:10, NewBraunfels TX28 1:18, SanMarcos SMCenterpoint SCUCISD SchertzClemens TX28 SanPedro Seguin 1:20, OldTunnel 1:22, Chiroptorium Huber 1:24, Wimberley Lockhart SMRB(Slayden) 1:28, Congress(~44% of the colony flew – some went 4 miles SW while most went 12 miles SE ~21% of them went to altitude) Dittmar Uvalde NuecesRR SmythCrossing 1:30, Temple DavisBlowout SanAngelo 1:38, FosterRd GrapeCreek 1:42,
when conditions allow, i.e. when the atmosphere is stable, no pressure drops, no strong wind or rain in the area, If conditions look good (low or no wind), get there early! The Congress bat pups have been flying for about 6 weeks now, so flights can be great nowadays, especially if a front moves through that stirs up insect activity.
Sunset: 7:50 pm Dark: 8:20 pm (10-20 min). earlier if cloudy) Sunrise: 7:09 am