25 April 2021 (26 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
Bracken (1,583,2802 – 67% to altitude) 0:02, DavisBlowout 0:22, Chirop 0:36, Frio 0:38, Stuart 0:52, Ney 0:58, Huber D’Hanis 1:04, Camden 1:10, BeaverCreek SanPedro Culebra&BanderaRd 1:18, Huntsville (674,820) 1:24, McNeil SMRB Crownridge 1:26, GrapeCreek FosterRd 1:30, OldTunnel WellsBranch Congress Loyola Floresville Poth 1:32, Howard 1:40, Fern 1:48,
2021-04-26_UTC
24 April 2021 (25 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
Bracken (2,862,796 ~13% to altitude) (3,035,698 total 2 flights) 0:04, Chiroptorium (272,256) 0:22, Frio (1,209,519) 0:38, DavisBlowout Huber (585,075) D’Hanis 0:42, Stuart 0:44, Ney 0:56, BeaverCreek McNeil SMRB 1:10, SMCenterpoint Bracken2 (172,902 ~40% to altitude) 1:18, Rucker 1:20, FtHood Congress ABIA Dittmar Onion Buda SanMarcos Lockhart 1:24, Vanderpool GrapeCreek FosterRd 1:28, Temple Salado 1:30,
2021-04-25_UTC
23 April 2021 (24 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
Bracken 0:12 as storm skirts the southern edge of the cave, Chiroptorium 0:44, Huber flies right down north of McNeil 0:46, Frio 0:56, OldTunnel 0:58, Stuart 1:00, Ney 1:04, McNeil 1:06, DavisBlowout 1:08, BeaverCreek 1:10, NuecesRR Frio90 1:12, Amistad 1:14, Congress (between storms) Nueces90 1:16, Stuart2 1:18, SMythCrossing 1:20, Comfort 1:26,
2021-04-24_UTC
22 April 2021 (23 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
Weather moving in from the West, Very little Hill Country or USHwy90W activity, Bracken_First_Flight (75,370) 0:22, Randolph 0:24, McNeil (220,405 ~15k of those to altitude) 0:42, BeeCliff 0:44, Dittmar Onion 0:56, NLamar UT SanMarcos SMCenterpoint Bracken2 (739,620 – 119,139 of those to altitude) 1:04, WellsBranch Howard Loyola Congress Lockhart 1:10, GrapeCreek FosterRd 1:28, Frio Stuart both very small 1:38,
2021-04-23_UTC
21 April 2021 (22 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
Bracken 0:22, Chiroptorium 1:04, Bracken2 Frio 1:08, Wimberley SMRB 1:16, Seguin 1:18, McNeil Dittmar 1:20, Huber Congress SanMarcos SMCenterpoint 1:22, Randolph 1:26, Lockhart 410&IH35 1:28, FtHood Temple Salado OldTunnel NuecesRR Hwy1572 1:34, DavisBlowout 1:40, Bracketville 1:44,
2021-04-22_UTC
20 April 2021 (21 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
N front passes San Antonio and USHwy90W to DelRio at 23:48, Bracken 0:14, DavisBlowout 0:34, Frio 0:40, Huber Ney 1:02, Stuart 1:10, Wimberley SMCenterpoint Seguin SMRB 1:16, McKinneyFalls SanMarcos 1:20, Congress D’Hanis 1:22, McNeil Dittmar Buda Kyle MustangRidge 1:24, Onion Lockhart 1:26, Salado WellsBranch Howard 1:30, GrapeCreek FosterRD 1:34,
2021-04-21_UTC
19 April 2021 (20 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
Widespread storms from the W cross the Hill Country diminishing and confounding flights, Bracken 0:08, Chiroptorium (~81,744) 0:26, Frio 0:58, SanPedro Camden 1:02, Stuart 1:04, McNeil 1:08, SMRB1:10, Howard NLamar 1:14, Congress 1:18, GrapeCreek FosterRd 1:24,
2021-04-20_UTC
18 April 2021 (19 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
Hungry Bracken bats (1,951,619 – 525.3k (27%) to altitude) storm out early 0:00, Huber 0:46, SanMarcos 1:06, MissionReach 1:14, McNeil BeeCliff Randolph 1:16, SanPedro Culebra&BanderaRd Stuart 1:18, Congress Loyola Wimberley SMCenterpoint TX28 410&IH35 1:20, Dittmar 1:24, Frio 1:26, Salado Howard NLamar Buda MustangRidge Kyle 1:28, Crownridge 1:32, Temple 1:34, OldTunnel Chiroptorium FairOaksRanch 1:36, Ney GrapeCreek FosterRd 1:40,
2021-04-19_UTC
17 April 2021 (18 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
A chilly night with 43 deg Dew Point at flight time, cave bats seemingly oblivious to the chill, all others diminished and diffuse, Bracken 0:28, Frio 0:34, Seguin 1:10, SMCenterpoint 1:14, SanMarcos 1:16, Stuart 1:20, Congress 1:22, McNeil SMythCrossing Dabny 1:26, FM1572 410&IH35 SanPedro Culebra&BanderaRd Ney Bracketville 1:30,Crownridge FairOaksRanch 1:32, Chirop D’Hanis Sabinal 1:34, OldTunnel 1:50, Huber Loyola 1:52, DavisBlowout 2:00
2021-04-18_UTC
16 April 2021 (17 April 2021 UTC) – times are also UTC (subtract 5:10 hours for CDT)
N front pushes through Hwy90W sweeping insects along with it, bats that felt its passage emerge (29,258 from SmythCrossing) to give chase, chilly evening across the SBA, Bracken 0:38, Stuart 0:46, Frio 1:02, Hwy1572 1:16, Wimberley SanMarcos SanPedro 1:18, NuecesRR 1:20, SmythCrossing 1:24, McNeil Lakeway Congress 1:26, D’Hanis 1:44,
2021-04-17_UTC