9:20 pm – 10:00 pm
when conditions allow, i.e. when temps are >50°F, Dew Point >45°F, Heating Degree Days <9, atmosphere stable, no pressure drops, no strong wind, no rain in the area.
Chance of a good flight if conditions stable, but likely considerably after dark

Sunset: 8:25 pm
Dark: 8:55 pm (10-20 minutes earlier if cloudy)
Sunrise: 6:31 am 

Flight:  10:32 pm
Scouts:

~2 hours after sunset only ~3% of the colony flew 4 miles NW on SE Winds at 17 mph – gusts to 25 mph – had been southerly 12-20 mph all afternoon with gusts to 29 mph around 6pm, Temp 88°F, Dew Point 69°F falling, Visibility 10 miles, A Few Clouds, 22 Cooling Degree Days, Cloud Base 4332′, RH 54% falling, Heat Index 93°F, BP 29.70 rising, bats viewable until 11:27 pm under streetlights

Storm between DelRio & EaglePass heading east along US90W to Uvalde, Frio 1:52, TX28 Randolph 1:54, Stuart Fern 2:00, Bracken 2:02, Rucker 2:04, Huber OldTunnel 2:26, Camden Culebra&BanderaRd BalconesHeights 2:28, Congress 3:32 some bats flew after the crowd left, D’Hanis 2:36,

9:10pm – 9:40 pm
when conditions allow, i.e. when temps are >50°F, Dew Point >45°F, Heating Degree Days <9, atmosphere stable, no pressure drops, no strong wind, no rain in the area.
Chance of a good flight if conditions stable, but likely after dark

Sunset: 8:24 pm
Dark: 8:54 pm (10-20 minutes earlier if cloudy)
Sunrise: 6:32 am 

9:10pm – 9:40 pm
when conditions allow, i.e. when temps are >50°F, Dew Point >45°F, Heating Degree Days <9, atmosphere stable, no pressure drops, no strong wind, no rain in the area.
Chance of a good flight if conditions stable, but likely after dark

Sunset: 8:23 pm
Dark: 8:53 pm (10-20 minutes earlier if cloudy)
Sunrise: 6:32 am 

Flight:  9:30 pm
Scouts: 9:08 pm

~67 minutes after sunset (way after dark) ~9% of the colony flew, some went 6 miles E others 4 miles NW (~48% of the total flew to altitude) on S Winds at 9 mph – had been S 9-16 mph most of the afternoon with gusts to 22 mph around 7pm, Temp 87°F, Dew Point 76°F rising, Visibility 10 miles, Overcast, 23 Cooling Degree Days, Cloud Base 2508′, RH 70% rising, Heat Index 98°F, BP 29.69 rising, bats viewable until 11:09 pm under streetlights

Strong storms from Brownwood through Waco to Tyler creating atmospheric instability in the northern Hill Country, Camden 1:04, CuevaLaVirgen(Coahuila) Frio Stuart Fern 1:56, Bracken 1:58, Rucker 2:04, SchertzClemens TX28 2:06, EaglePass 2:08, McNeil 2:10, Huber OldTunnel NuecesRR SmythCrossing Pinto 2:12, Chiroptorium 2:18, D’Hanis 2:20, Lockhart Luling 2:22, CongressScouts 2:30, Congress(~9% few a few miles E&NW) 2:38,

Flight:  9:30 pm
Scouts: 9:08 pm

~127 minutes after sunset (way way after dark) only ~3,600 headed 4 miles WNW on SE Winds at 15 mph – had been SE 14-24 mph most of the afternoon with gusts to 30 mph around 7pm, Temp 85°F, Dew Point 72°F falling, Visibility 10 miles, Partly Cloudy, 20 Cooling Degree Days, Cloud Base 2964′, RH 65% rising, Heat Index 91°F, BP 29.74 rising, bats viewable until midnight under streetlights

Yet another storm barreling down from Mason dissipating between MarbleFalls & JohnsonCity, Frio 1:48, Bracken Camden 1:58, Culebra&BanderaRd Stuart 2:02, Chiroptorium SCIUCISD SchertzClemens 2:06, EaglePass 2:12, Longhorn&Western 2:14, OldTunnel CongressScouts SmythCrossing Fern 2:16, Rucker 2:22, Huber as storm passes 2:34, D’Hanis 2:34, McNeil Congress(only ~3,600 flew a few miles NW in gusty conditions 3:38,

9:10pm – 9:40 pm
when conditions allow, i.e. when temps are >50°F, Dew Point >45°F, Heating Degree Days <9, atmosphere stable, no pressure drops, no strong wind, no rain in the area.
Chance of a good flight if conditions stable, but likely after dark

Sunset: 8:23 pm
Dark: 8:53 pm (10-20 minutes earlier if cloudy)
Sunrise: 6:32 am