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Saturday August 2, 2025

Flight: 8:26 pm

-2 minutes after sunset (12 mins before dark on a Mostly Cloudy evening) ~63% of the colony flew 14 miles SE (~27% of those climbed to altitude) into SE Winds at 3 mph – had been Light & Variable turning N around 3:30 with gusts to 26 mph before a Thunderstorm around 5:30 pm , Mostly Cloudy, Temp 82°F, Dew Point 71°F steady, 23 Cooling Degree Days, Cloud Base 2508, RH 69% rising, Heat Index 86°F, BP 30.04 falling, sea level pressure 1016.2 mb falling, bats viewable until 9:35 pm under streetlights

Friday August 1, 2025

Widespread storms moving S across the Hill Country, outflow boundary passes S through Austin at 23:00 (5:52pm), storm passes S just W of Austin, Frio 0:40, Bracken 0:42, McNeil 1:00, Chiroptorium 1:08 after storm, JamesRiver SALutheran 1:16, McNeil2 1:22, SMCenterpoint 1:26, SanMarcos Frio2 D’Hanis 1:34, DavisBlowout WellsBranch NLamar Crestwood&IH35 Congress(~43% of the colony flew 12 miles SE ~11% of the total climbed to altitude) ABIA Dittmar 1:38, OldTunnel Loyola Lockhart 1:42, Ney 1:46, SMRB(Slayden) 1:54, Temple 2:00, Huber 2:08, storms suppress or confound readings of other flights

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Monday August 4, 2025

8:20 pm – 8:50 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 bats have weaned their pups, so flights will start getting great soon, especially if a front moves through that stirs up insect activity.

Sunset: 8:22 pm
Dark: 8:52 pm (10-20 min). earlier if cloudy)
Sunrise: 6:51 am

Friday August 1, 2025

Flight: 8:28 pm

-3 minutes after sunset (17 mins before dark) ~43% of the colony flew 12 miles SE (~11% of the total climbed to altitude) on N Winds at 3 mph – had been easterly 8-12 mph most of the afternoon with gusts to 21 mph around 4:30pm , Partly Cloudy, Temp 84°F, Dew Point 69°F steady, 22 Cooling Degree Days, Cloud Base 3420, RH 61% rising, Heat Index 88°F, BP 30.07 falling, sea level pressure 1017.0 mb falling, bats viewable until 9:15 pm under streetlights

Thursday July 31, 2025

ChiroptoroiumScouts 0:18, Bracken 0:32, MysticShores 0:54, Frio 1:00, Chiroptorium 1:14, JamesRiver McNeil 1:16, SanMarcos SanPedro 1:22,Seguin 1:28, SMCenterpoint 1:32, OldTunnel Frio2 1:38, Congress(~22% of the colony flew – some went 8 miles SE while most went 8 miles NE ~15% of the total climbed to altitude) 1:40, DavisBlowout WellsBranch NLamar Crestwood&IH35 Loyola WaterlooGreenway ABIA Dittmar Wimberley Lockhart Ney 1:46, SMRB(Slayden) 1:52, Temple 1:54, Rucker 2:00, JamesRiver2 2:02, US277&TX55 FosterRd 2:06, OldTunnel2 2:08, SanAngelo GrapeCreek 2:12, Huber Fern 2:14,

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Thursday July 31, 2025

Flight: 8:30 pm

-4 minutes after sunset (26 mins before dark) ~22% of the colony flew – some went 8 miles SE while most went 8 miles NE (~15% of the total climbed to altitude) on S Winds at 8 mph – had been Light & Variable all afternoon , A Few Clouds, Temp 91°F, Dew Point 64°F steady, 19 Cooling Degree Days, Cloud Base 6156, RH 41% rising, Heat Index 93°F, BP 29.99 rising, sea level pressure 1014.3 mb rising, bats viewable until 9:43 pm under streetlights

Wednesday July 30, 2025

Chiroptorium 0:32, Bracken 0:46, Frio 0:54, JamesRiver 1:10, McNeil 1:16, Frio2 1:28, Chiroptorium2 1:34, SanMarcos SMCenterpoint 1:36, CongressScouts 1:38, OldTunnel DavisBlowout 1:42, WellsBranch NLamar Crestwood&IH35 Congress(~23% of the colony flew 10 miles SE  ~11% of the those climbed to altitude) 1:44, Wimberley Lockhart SMRB(Slayden) 1:46, Temple 1:52, Ney 1:56, Vanderpool Rucker US277&TX55 FosterRd 2:06, SanAngelo GrapeCreek 2:12, Uvalde 2:14, BeaverCreek 2:16, Huber Fern 2:20,

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Friday August 1, 2025

8:20 pm – 8:50 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 bats have weaned their pups, so flights will start getting great soon, especially if a front moves through that stirs up insect activity.

Sunset: 8:24 pm
Dark: 8:54 pm (10-20 min). earlier if cloudy)
Sunrise: 6:50 am

Wednesday July 30, 2025

Flight: 8:34 pm
Scouts: 8:28 pm

-8 minutes after sunset (16 mins before dark) ~23% of the colony flew 10 miles SE  (~11% of the those climbed to altitude) into SE Winds at 6 mph – had been southerly 7-9 mph most of the afternoon – swinging to the N from 1pm-3pm , Partly Cloudy, Temp 83°F, Dew Point 56°F rising, 17 Cooling Degree Days, Cloud Base 6156, RH 40% rising, Heat Index 82°F, BP 29.97 rising, sea level pressure 1013.7 mb rising, bats viewable until 9:39 pm under streetlights

Tuesday July 29, 2025

Chiroptorium 0:44, Bracken 0:50, Frio 1:02, McNeil 1:16, DavisBlowout 1:34, SMCenterpoint SanPedro SALutheran Seguin 1:40, Frio2 1:44, OldTunnel Wimberley SanMarcos Camden 1:46, WellsBranch Nlamar Crestwood&IH35 Congress(~28% of the colony flew 14 miles SE  – 43% of the those climbed to altitude) ABIA 1:50, Temple Lockhart SMRB(Slayden) 1:56, Ney 2:00, D’Hanis Rucker US277&TX55 2:06, JamesRiver 2:10, Huber EaglePass SanAngelo 2:18, FosterRd GrapeCreek 2:20,

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