2 mins before sunset (12 minutes before dark on an Overcast evening) ~891,961 braved the unstable conditions and flew 12 miles SE (~31% of them went to altitude) on NE Winds at 9 mph – had been NE 8-15 mph most of the afternoon with gusts to 24 mph as diminishing after 2:30pm, Overcast, Temp 80°F, Dew Point 72°F falling, 18 Cooling Degree Days, Cloud Base 1824′, RH 76% rising, Heat Index 84°F, BP 29.99 rising, sea level pressure 1014.5 mb rising, bats viewable until 9:11 pm under streetlights
Saturday August 30, 2025
Slow-moving cold front reaches Austin around 23:00 (6pm) triggering storms along US 290 and out along IH10 to Sonora, Frio 0:30, Bracken 0:34, Randolph SanPedro 0:38, McNeil 0:52, SanMarcos SCUCISD SchertzClemens SALutheran 0:56, Huber 0:58, Congress(~1,075,092 flew out between rain clouds and went 18 miles SSW ~8% of them went to altitude) 0:58 between storm clouds, Dittmar SMRB(Slayden) 1:04, Stuart 1:10, Wimberley Lockhart 1:12, Temple 1:22, SanAngelo 1:26, FosterRd 1:30, GrapeCreek 1:36, Fern 1:42, other flights 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 5 weeks now, so flights can be great nowadays, especially if a front moves through that stirs up insect activity.
Sunset: 7:54 pm Dark: 8:24 pm (10-20 min). earlier if cloudy) Sunrise: 7:07 am
Saturday August 30, 2025
Flight: 7:50 pm
6 mins before sunset (16 minutes before dark on an Overcast evening) ~1,075,092 flew out between rain clouds and went 18 miles SSW (~8% of them went to altitude) on NE Winds at 14 mph – had been southerly 6-8 mph becoming NE at 22 mph with gusts to 40 mph around 6:30 pm, Overcast, Temp 85°F, Dew Point 72°F falling, 23 Cooling Degree Days, Cloud Base 2964′, RH 65% rising, Heat Index 91°F, BP 29.90 rising, sea level pressure 1011.3 mb rising, bats viewable until 8:45 pm under streetlights
Friday August 29, 2025
A band of scattered storms along IH10 from FtStockton to Schulenberg dissipating toward flight time, Bracken 0:30, Chiroptorium 0:36, Frio 0:40, OldTunnel 0:50, McNeil 0:54, Huber 0:56, 410&IH35 SanPedro SALutheran 1:00, WaterlooGreenway McKinneyFalls Dittmar NewBraunfels TX28 SMRB(Slayden) 1:04, Crestwood&IH35 ABIA 1:06, SanMarcos Seguin 1:08, Congress(~1,238,764 flew out to see what the storm brought – some went 4 miles NE while most went 18 miles SE ~28% of the total went to altitude) SMCenterpoint Lockhart 1:10, Temple Wimberley 1:14, Stuart US277&TX55 1:16, Victoria 1:18, Thorndale SanAngelo 1:20, EaglePass 1:22, DavisBlowout 1:28, GrapeCreek 1:30, FosterRd 1:32, SmythCrossing FM1572 1:34,
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 5 weeks now, so flights can be great nowadays, especially if a front moves through that stirs up insect activity.
Sunset: 7:56 pm Dark: 8:26 pm (10-20 min). earlier if cloudy) Sunrise: 7:07 am
Friday August 29, 2025
Flight: 8:02 pm
5 mins after sunset (~8 minutes before dark on a Mostly Cloudy evening) ~1,238,764 flew out to see what the storm brought – some went 4 miles NE while most went 18 miles SE (~28% of the total went to altitude) into E Winds at 8 mph – had been Light & Variable after noon becoming N at 14 mph with a Thunderstorm around 4:30pm, Mostly Cloudy, Temp 85°F, Dew Point 72°F rising, 23 Cooling Degree Days, Cloud Base 2964′, RH 65% rising, Heat Index 91°F, BP 29.88 falling, sea level pressure 1010.7 mb falling, bats viewable until 8:59 pm under streetlights
Thursday August 28, 2025
Chiroptoroium 0:24, OldTunnel Bracken 0:30, Frio 0:48, DavisBlowout Huber 0:54, SanPedro 0:56, McNeil 0:58, SaladoCreek&MLKdriver 410&IH35 1:00, SanMarcos 1:04, WaterlooGreenway 1:08, Lockhart SMCenterpoint TX28 BalconesHeights SALutheran Seguin SMRB(Slayden) 1:10, WellsBranch CongressScouts 1:12, Stuart 1:14, NLamar Crestwood&IH35 Congress(~40% of the colony flew – some went 12 miles NE while most went 18 miles SE ~35% of the total went to altitude) ABIA 1:16, Temple Loyola Dittmar Wimberley 1:18, Floresville 1:24, SanAngelo FosterRd GrapeCreek 1:32, NuecesRR 1:36, SmythCrossing EaglePass 1:42, Thorndale 1:46, JamesRiver D’Hanis LaNavaja(Coahuila) ElMoral(Coahuila) Fern 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 5 weeks now, so flights can be great nowadays, especially if a front moves through that stirs up insect activity.
Sunset: 7:57 pm Dark: 8:27 pm (10-20 min). earlier if cloudy) Sunrise: 7:06 am
Thursday August 28, 2025
Flight: 8:08 pm
Scouts: 8:04 pm
10 mins after sunset (~20 minutes before dark) ~40% of the colony flew – some went 12 miles NE while most went 18 miles SE (~35% of the total went to altitude) into SE Winds at 7 mph – had been southerly 8-16 mph all afternoon with gusts to 24 mph just after noon, A Few Clouds, Temp 94°F, Dew Point 66°F rising, 23 Cooling Degree Days, Cloud Base 6384′, RH 40% rising, Heat Index 97°F, BP 29.88 rising, sea level pressure 1010.5 mb falling, bats viewable until 9:09 pm under streetlights