Notes: 19 minutes after sunset (ten minutes before dark), only ~10% of the colony flew 8 miles NNW to meet the outflow boundary and follow it W (only ~5% of the those flew to altitude) on SE Winds at 10 mph – had been S 8-12 mph most of the day with gusts to 20 mph around 4:30pm, Visibility 10 miles, Partly Cloudy, Temp 89°F, Dew Point 75°F rising, 15 Cooling Degree Days, Cloud Base 3192′, RH 63% rising, Heat Index 99°F, BP 29.89 rising, sea level 1010.9 mb rising, bats viewable until 9:35 pm when rain moved in
Friday June 13, 2025
Outflow boundary from storm over Lake Sommerville heading W toward the I-35 corridor hits Austin at 9:15 pm, Bracketville radar back online, Bracken 1:04, Chiroptorium 1:14, Huber 1:24, Frio 1:26, DavisBlowout 1:28, Stuart 1:44, McNeil 1:48, SanPedro SALutheran 1:50, WellsBranch 1:52, Fern 1:56, Camden 1:58, OldTunnel NLamar Crestwood&IH35 Loyola Congress(8% of the colony flew NNE to meet the outflow boundary and followedit W 2:00, Temple FosterRd 2:18, SanAngelo OCFisher 2:22, EaglePass GrapeCreek 2:26, Ney 2:30,
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 bats are giving birth these days (average date of birth is June 10th) so flights will be diminished, unless a north front moves through that stirs up insect activity.
Sunset: 8:33 pm
Dark: 9:03 pm (10-20 min. earlier if cloudy)
Sunrise: 6:29 am
Thursday June 12, 2025
Flight: 8:58 pm
Notes:25 minutes past sunset (just before dark) only ~13% of the colony flew 8 miles ESE (8% of those flew to altitude) on S Winds at 3 mph – had been southerly 5-9 mph most of the afternoon, Visibility 10 miles, A Few Clouds, Temp 74°F, Dew Point 70°F steady, 9 Cooling Degree Days, Cloud Base 912′, RH 88% rising, Heat Index 79°F, BP 29.85 falling, sea level 1010.1mb falling, bats viewable until 10:05 pm under streetlights
Thursday June 12, 2025
Bracketville radar remains offline, Bracken 1:08, Chiroptorium Huber 1:26, Ney 1:30, BalconesHeights 1:40, SanPedro 1:44, SALutheran 1:48, McNeil NLamar Loyola 2:00, Crestwood&IH35 Congress Scouts 2:04, Congress(only ~13% of the colony flew 8 miles ESE – 8% of those flew to altitude) 2:06, FosterRd 2:18, SanAngelo 2:24, OCFisher GrapeCreek 2:24,
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 bats are giving birth these days (average date of birth is June 10th) so flights will be diminished, unless a north front moves through that stirs up insect activity.
Sunset: 8:33 pm
Dark: 9:03 pm (10-20 min. earlier if cloudy)
Sunrise: 6:29 am
Wednesday June 11, 2025
Flight: 9:00 pm
Notes: ~28 minutes after sunset (at dark) only ~4% of the colony flew 6 miles NNE (and only ~5% of those went to altitude) on SE Winds at 7 mph – had been southerly 7-13 mph most of the afternoon, A Few Clouds, Temp 81°F, Dew Point 72°F rising, 15 Cooling Degree Days, Cloud Base 2052′, RH 74% rising, Heat Index 85°F, BP 29.90 rising, sea level 1011.5mb rising, bats viewable until 10:43 pm under streetlights
Wednesday June 11, 2025
Bracketville radar offline, strong storms developing from MarbleFalls to Kerrville heading toward the I-35 corridor, Frio 1:12, Chiroptorium 1:22, Bracken 1:24, SanPedro 1:32, Huber 1:42, SALutheran 1:44, ShertzClemens 1:48, TX28 1:50, McNeil SCUCISD Seguin 1:52, NewBraunfels 1:56, WellsBranch SMCenterpoint 2:00, Wimberlehy SanMarcos 2:02, Crestwood&IH35 Congress(only ~4% of the colony flew 6 miles NNE – and only ~5% of those went to altitude) 2:08, FosterRd SanAngelo OCFisher 2:14, Loyola 2:16, TomMillerDam GrapeCreek 2:22,
Powerful storms in a line from EaglePass to SanAngelo heading E, Frio 1:22 in unstable conditions as rain approaches, Chiroptorium 1:28, Bracken SanAngelo 1:32, SALutheran 1:38, 410&IH35 1:44, SchertzClemens Culebra&BanderaRd Camden 1:46, Huber 1:48, OldTunnel SCUCISD TX28 1:50, Seguin 1:52, McNeil SMCenterpoint 1:54, Wimberley SanMarcos SMCenterpoint 1:56, Congress(only ~12% of the colony flew 12 miles SSW – only ~1% of the those flew to altitude) 2:00, WellsBranch Crestwood&IH35 Dittmar Buda 2:02, SMRB(Slayden) 2:10, Thorndale 2:12, Temple 2:16,
Front from NE sweeps down I-35 corridor, storms from NW around SanAngelo, Frio 0:42, Chiroptorium 0:50, OldTunnel 1:06, Bracken 1:22, TX28 1:26, Huber Stuart 1:28, SALutheran 1:34, D’Hanis 1:36, SchertzClemens SanPedro 1:38, DavisBlowout Randolph Seguin 1:42, SCUCISD 1:46, McNeil Frio2 1:48, Lockhart NewBraunfels SCUCISD Culebra&BandersRd 1:50, SMCenterpoint 1:52, WellsBranch Congress(~63% of the colony chased the frontal passage – some went 6 miles WNW while most went 12 miles SSW – only ~3% of the total went to altitude) Dittmar Wimberley SanMarcos Camden Fern 1:54, Crestwood&IH35 Loyola ABIA Floresville 2:00, FM1572 2:02, Temple 2:04,