12 December 2021 Local Date – (13 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Winds calmer but cold is reinforced by radiant cooling under clear skies, Bracken (~3.9k) 0:14, small flight from TX28 heads to Bracken 0:18, another flight from Lackland does the same 0:22,
2021-12-13_UTC

11 December 2021 Local Date – (12 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Deep cold settles in to the SBA on a strong N wind, Bracken (~101,067 flew 24 miles SSE only 1% to altitude) 0:04, FM1572, McNeil (tiny) 0:10, the only CenTex action
2021-12-12_UTC

10 December 2021 Local Date – (11 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Warm south winds rushing to meet oncoming cold front from NW, CiboloSteele 23:46, FosterSt 23:52, 410&IH35 Camden 23:58, TX28 MadisonHS SanPedro 0:04, CanyonLake Bracken Hubertus Randolph Crownridge FM1572 0:06, GrapeCreek 0:10, SanMarcos 0:12, McNeil Loyola Congress (~163.7k) Seguin 0:16, OldTunnel Wimberley SMRB-Slayden D’Hanis 0:20, Stuart 0:34,
2021-12-11_UTC

09 December 2021 Local Date – (10 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
SanMarcos CiboloSteele 23:50, GrapeCreek FosterRd 0:04, Hubertus Schertz 410&IH35 Timberwood FM1572 0:06, Bracken Randolph SanPedro Camden 0:10, Loyola LeonSprings 0:18, Congress 0:26, McNeil (26.4k) 0:28,
2021-12-10_UTC

08 December 2021 Local Date – (09 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Not much activity in the SBA, CiboloSteele 23:42, StoneOak 23:48, FtSam 0:02,. TX28 0:04, 410&IH35 GrapeCreek FosterRd 0:06, Hubertus Timberwood 0:12, LeonSprings 0:20, OldTunnel ~16k foraged locally (McNeil WellsBranch Howard all tiny) SanMarcos 0:28, Wimberley 0:32, UT Loyola 0:36, Comfort 0:42, Congress (tiny ~700) 0:56,
2021-12-09_UTC

07 December 2021 Local Date – (08 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Bracken 0:04 (1,599 (20%) of those to altitude), GrapeCreek FosterRd 0:10, Congress (~780) 0:28, No other CenTex activity
2021-12-08_UTC

06 December 2021 Local Date – (07 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Upper level flow from the WSW along US90W, CiboloSteele SanPedro 23:52, FtHood Bracken FredericksburgRd&IH10 Camden 23:56, 410&IH35 Crownridge 0:00, McNeil NewBraunfels FM1572 0:02, 2/3 of Congress bats migrate – 1/3 move to Bracken – 1/3 migrate through Seguin – Dittmar TX28 Randolph Seguin FosterRd 0:04, Wimberley 0:08, SanMarcos GrapeCreek 0:12,
2021-12-07_UTC

05 December 2021 Local Date – (06 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Upper level flow from the WSW, FredericksburgRd&IH10 23:30, SanPedro&410 23:40, CiboloSteele Camden 23:44, NewBraunfels Seguin 23:52, WellsBranch 23:54, Bracken TX28 410&IH35 Crownridge 23:56, Schertz Randolph 0:00, McNeil CanyonLake 0:04, NLamar Loyola UT SanMarcos GrapeCreek FosterRd 0:10, Wimberley 0:12, Congress 0:16, LeonSprings Luling 0:18,
2021-12-06_UTC

04 December 2021 Local Date – (05 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
Isolated thunderstorm develops over Fredericksburg – dissipates as it moves quickly eastward S of Austin, Muehlsville 23:38, Camden 23:40, CiboloSteele SanPedro IH10&FredericksburgRd 23:42, FosterRd 23:44, Wimberley Randolph 23:46, WellsBranch 23:50, CongressScouts Seguin GrapeCreek 23:52, McNeil 410&IH35 Crownridge 23:54, Howard 23:56, UT 23:58, Bracken TX28 Schertz 0:00, SanMarcos SMCenterpoint CanyonLake 0:10, OldTunnel 0:24, Congress 0:34 after rain passed to the S of the bridge, Vanderpool Frio Stuart 0:38, Fern 1:00, Temple 1:10, Howard2 (~4,011) 1:24,
2021-12-05_UTC

03 December 2021 Local Date – (04 December 2021 UTC) – times are also UTC (subtract 6:08 hours for CST of flights)
CiboloSteele 23:46, BalconesHeights 23:52, WellsBranch (~6,260) 23:50, SanMarcos SMCenterpoint Bracken 410&IH35 SanPedro Camden Seguin 0:00, Salado McNeil GrapeCreek FosterRd 0:02, Timberwood Hubertus Randolph TX28 Crownridge FM1572 0:06, UT 0:08, Wimberley 0:20, Congress 0:24, OldTunnel EaglePass 0:28, Comfort 0:42, Temple 0:52, many SanAnto bats moved back toward Bracken around 10 pm
2021-12-04_UTC