Storms heading down IH35 early with outflow boundary passing Bracken at 4:30pm, more storms heading SSE toward US90W at flight time, Bracken 0:20, Chiroptorium 0:38, SanPedro SALutheran Camden 1:10, Frio 1:14 after storm passes, OldTunnel 1:20, Seguin 1:24, McNeil 1:26, SMRB(Slayden) 1:28, Congress(1,533,290 took flight, some went miles NE while most went 12 miles SSE – only ~6% of those went to altitude) ABIA DIttmar Buda Kyle Wimberley Lockhart 1:32, WellsBranch Crestwood Loyola 1:38, Rucker 1:44, SanAngelo 1:58, GrapeCreek 2:00, Stuart Fern 2:02, FosterRd 2:06,
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 taken to the wing, so flights can be great nowadays, especially if a front moves through that stirs up insect activity.
Sunset: 8:11 pm Dark: 8:41 pm (10-20 min). earlier if cloudy) Sunrise: 6:59 am
Wednesday August 13, 2025
Flight: 8:24 pm
~10 mins after sunset (10 mins before dark on a Mostly Cloudy evening) 1,533,290 took flight, some went miles NE while most went 12 miles SSE (only ~6% of those went to altitude) Winds Calm – had been N 7-8 mph early becoming E at 18 mph w/ gusts to 28 mph and a Thunderstorm around 3:30pm, Mostly Cloudy, Temp 84°F, Dew Point 74°F rising, 21 Cooling Degree Days, Cloud Base 2280, RH 72% rising, Heat Index 91°F, BP 29.90 rising, sea level pressure 1011.5 mb rising, bats viewable until 10:15 pm under streetlights
Tuesday August 12, 2025
Outflow boundaries heading S from storms over Burnet and Uvalde counties, Chiroptorium 0:10, Bracken 0:14, OldTunnel 0:46, McNeil 1:00, Ney 1:04, Rucker 1:16, Congress(1,545,010 chased an outflow boundary 8 miles to the S ~12% of those went to altitude) Dittmar 1:22, ABIA SMCenterpoint 1:26, US277&TX55 1:28, Wimberley Lockhart SanMarcos SMRB(Slayden) 1:30, Punkin 1:36, nothing from Stuart, SanAngelo FosterRd 1:50, JamesRiver 1:54, GrapeCreek 1:58, other flights suppressed or readings confounded by weather
At sunset (20 mins before dark on a Mostly Cloudy evening) 1,545,010 chased an outflow boundary 8 miles to the S (~12% of those went to altitude) on NE Winds at 6 mph – had been easterly 3-9 mph most of the afternoon, Mostly Cloudy, Temp 94°F, Dew Point 63°F falling, 21 Cooling Degree Days, Cloud Base 7068, RH 36% rising, Heat Index 95°F, BP 29.90 rising, sea level pressure 1011.0 mb rising, bats viewable until 8:57 pm under streetlights
Monday August 11, 2025
Storms subsiding out W as they move from Iraan to DelRio, isolated storm cells near SanMarcos and Floresville, Frio 0:26, Bracken 0:32, Chiroptorium 0:36, OldTunnel 0:54, 410&IH35 0:58, SALutheran 1:06, D’Hanis 1:08, McNeil 1:10, Ney Frio2 1:12, SanPedro 1:16, Camden 1:20, SanMarcos 1:22, Huber 1:24, SMCenterpoint Seguin SMRB(Slayden) 1:28, WellsBranch NLamar Congress(only ~26% of the colony flew – some went 8 miles WNW while most went 8 miles ESE ~34% of the total climbed E to altitude) into E Winds at 6 mph ABIA Dittmar 1:30 Buda Kyle Wimberley Lockhart 1:32, Temple 1:38, Frio3 1:40, FosterRd 1:46, SanAngelo 1:52, JamesRiver GrapeCreek 1:56,
-6 minutes after sunset (well before dark) only ~26% of the colony flew – some went 8 miles WNW while most went 8 miles ESE (~34% of the total climbed E to altitude) into E Winds at 6 mph – had been easterly 7-15 mph most of the afternoon with gusts to 21 mph around 5:30pm, A Few Clouds, Temp 89°F, Dew Point 68°F rising, 21 Cooling Degree Days, Cloud Base 4788, RH 50% rising, Heat Index 93°F, BP 29.89 rising, sea level pressure 1011.0 mb rising, bats viewable until 9:53 pm under streetlights
Sunday August 10, 2025
Outflow boundaries heading W from isolated storms over Burleson County and from Austin to SanAntonio, Chiroptorium 0:16, Bracken 0:34, Frio 0:36, SALutheran 0:50, OldTunnel 0:56, McNeil 1:12, Ney 1:16, D’Hanis 1:18, Rucker 1:22, SanMarcos 1:24, WaterlooGreenway Wimberley SMRB(Slayden) 1:32, Crestwood&IH35 Congress(~47% of the colony flew – most went 12 miles SSW while some went 6 miles NE ~29% of the total climbed E to altitude) ABIA Dittmar Buda Lockhart 1:36, Huber NLamar 1:38, US277&TX55 1:42, Temple 1:44, Punkin SanAngelo FosterRD 1:48, Thorndale GrapeCreek 1:52, OldTunnel2 1:54, EaglePass 2:00,
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 taken to the wing, so flights can be great nowadays, especially if a front moves through that stirs up insect activity.
Sunset: 8:14 pm Dark: 8:44 pm (10-20 min). earlier if cloudy) Sunrise: 6:57 am
Sunday August 10, 2025
Flight: 8:28 pm
-11 minutes after sunset (well before dark) ~47% of the colony flew – most went 12 miles SSW while some went 6 miles NE (~29% of the total climbed E to altitude) on SE Winds at 15 mph – had been southerly 7-10 mph most of the afternoon with gusts to 28 mph around 7:30 pm, A Few Clouds, Temp 88°F, Dew Point 70°F falling, 21 Cooling Degree Days, Cloud Base 4104, RH 55% rising, Heat Index 93°F, BP 29.94 rising, sea level pressure 1012.5 mb rising, bats viewable until 10:13 pm under streetlights