Friday August 15, 2025

Flight: 8:26 pm

~14 mins after sunset (10 mins before dark on a Partly Cloudy evening) ~30% of the colony flew, some went 4 miles NNE while most went 12 miles S (~20% of the total went to altitude) on SE Winds at 6 mph – had been SE 6-16 mph most of the afternoon with gusts to 33 mph and a Thunderstorm w/ Light Rain around 3:30pm, Partly Cloudy, Temp 87°F, Dew Point 73°F falling, 22 Cooling Degree Days, Cloud Base 3192′, RH 63% steady, Heat Index 95°F, BP 30.00 steady, sea level pressure 1014.7 mb rising, bats viewable until 9:37 pm under streetlights

Thursday August 14, 2025

Bracken 0:32, Frio 0:42, 410&IH35 1:08, Chiroptorium NewBraunfels TX28 1:14, OldTunnel SCUCISD Randolph SanPedro Camden FtSam SAMetzgerMS 1:20, McNeil 1:26, SanMarcos SMCenterpoint Luling SMRB(Slayden) 1:28,Wimberley Lockhart WellsBranch Crestwood&IH35 WaterlooGreenway 1:32, CongressScouts 1:34, Congress(only ~15% of the colony flew 12 miles NE ~20% of those went to altitude) Onion Buda 1:38, Loyola ABIA 1:40, Huber1:46, D’Hanis Rucker 1:54, SanAngelo GrapeCreek 2:00, Fern 2:02, DavisBlowout 2:04, JamesRiver 2:06, FosterRd 2:08, Ney 2:22, Temple 2:42,

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Thursday August 14, 2025

Flight: 8:30 pm

~17 mins after sunset (just before dark on a Mostly Cloudy evening) only ~15% of the colony flew 12 miles NE (~20% of those went to altitude) on SE Winds at 12 mph – had been SE 10-17 mph most of the afternoon with gusts to 24 mph around 5:30pm, Mostly Cloudy, Temp 95°F, Dew Point 66°F rising, 23 Cooling Degree Days, Cloud Base 6612, RH 39% rising, Heat Index 98°F, BP 29.89 rising, sea level pressure 1010.8 mb rising, bats viewable until 9:25 pm under streetlights

Wednesday August 13, 2025

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,

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Saturday August 16, 2025

8:15 pm – 8:45 pm

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

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Tuesday August 12, 2025

Flight: 8:14 pm

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,

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Monday August 11, 2025

Flight: 8:22 pm

-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