Isolated thunderstorms formed along a stationary front. Some of these storms produced damaging wind gusts.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS EWX wrote it up.
Isolated thunderstorms formed along a stationary front. Some of these storms produced damaging wind gusts.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before the first event at Sep 6, 1:03 PM CST, 27 minutes earlier.
Area Forecast Discussion National Weather Service Austin/San Antonio TX 203 PM CDT Mon Sep 6 2021 .SHORT TERM (Tonight through Tuesday Night)... A weak frontal boundary has stalled across our CWA from northern Lee County to northern Kinney County. Winds north of the boundary are light from the northeast while south of it they are light from the southwest. Isolated convection has developed across the northern half of the CWA. This activity will continue through the afternoon and early evening. The morning sounding from DRT has PW of 1.37 inches which is sufficient for locally heavy downpours. Forecast soundings also suggest a chance for gusty winds possibly up to 50 mph. While the boundary helped get convection started it should die off with the loss of heating this evening. The overnight period will be dry and continued warm. Low temperatures will be above normal. The front will dissipate over our region Tuesday. The low level flow will be light and variable over the CWA and models show a slight chance for showers and thunderstorms over the northwest during the afternoon. After sunset rain chances will end leading to another warm, dry night. && .LONG TERM (Wednesday through Monday)... The forecast H5 pattern for the middle to latter portion of the week will consist of a broad ridge centered near the Four Corners region that will extend into Texas and troughing across the Great Lakes with weak PV anomalies extending to the Gulf Coast. A "cold" front may again approach the region on Thursday, but with dry air in place and no upper forcing it will bring little more than a brief wind shift and a temperature decrease of only 1-3 degrees if it's even able to reach south-central TX. The ridge will move eastward and begin to flatten into this weekend, and high pressure will control our weather locally for the foreseeable future. This will mean dry, warm conditions at least through Saturday. On Sunday, onshore flow will become re-established and the increase in moisture could mean some sea-breeze showers and storms in the afternoon, primarily for the Coastal Plains. This pattern will likely continue into early next week. We'll also be keeping eyes on the tropics, as global model guidance continues to suggest another system may spin up in the western Gulf of Mexico late Sunday or Monday. Details on strength and track of any potential development are impossible to nail down at this time, but WPC has outlooked the Coastal Bend just southeast of our CWA on the day 3-7 hazards map for the potential of locally heavy rain on Monday. NBM is pointing towards cooler daytime highs Monday and Tuesday, however confidence is low at this time given the uncertainty surrounding any tropical development, so I've opted to bump these values up 1-3 degrees for now. && .PREV DISCUSSION... /ISSUED 1235 PM CDT Mon Sep 6 2021/ AVIATION... There is a weak frontal boundary across the region. North of the boundary winds are light out of the northeast while south of it they are light from the southwest. So far there hasn't been any convection near the terminals. All airports are VFR and will stay that way through the afternoon and evening. There is a slight chance for showers and thunderstorms this afternoon in Austin and San Antonio with better chances in San Antonio. The main impact from storms will be lower visibility. We expect the winds will shift to the northeast in the San Antonio area later this afternoon, but will stay less than 10 kts. All terminals will be VFR overnight and Tuesday morning. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 74 97 72 98 73 / 10 - 0 - 0 Austin Bergstrom Intl Airport 72 96 70 98 71 / 20 0 0 - 0 New Braunfels Muni Airport 72 97 70 98 71 / 20 - 0 0 0 Burnet Muni Airport 72 94 70 96 71 / - - 0 - 0 Del Rio Intl Airport 76 99 75 99 74 / 10 10 - - - Georgetown Muni Airport 72 96 70 97 71 / - - 0 - 0 Hondo Muni Airport 74 96 72 97 71 / 20 10 - 0 0 San Marcos Muni Airport 72 97 70 98 71 / 10 - 0 0 0 La Grange - Fayette Regional 74 97 72 98 72 / - - 0 - 0 San Antonio Intl Airport 75 96 74 97 74 / 20 10 0 - 0 Stinson Muni Airport 76 97 75 99 74 / 20 - 0 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Short-Term/Aviation...05 Long-Term...KCW Decision Support...Brady
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 402 AM CDT Mon Sep 6 2021 TXZ171>173-183>194-202>209-217>225-228-070915- Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera- Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde- Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala- Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit- 402 AM CDT Mon Sep 6 2021 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. Isolated to scattered showers and thunderstorms are expected Monday afternoon into evening. The stronger storms could produce locally heavy downpours and wind gusts to 50 mph. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
The Austin/San Antonio radar (KEWX), 14 km away, was scanning. The volume nearest the first event began at 19:31 UTC.
2 thunderstorm wind. Local standard time, as filed.
A thunderstorm produced wind gusts estimated at 60 mph that damaged the roof of the Full Moon Saloon at the intersection of Hwy 123 and FM 1978 near Redwood.
A thunderstorm produced wind gusts estimated at 65 mph that knocked down tree branches from two to five inches in diameter in Bastrop.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2021Every state in 2021This day in weather historyWarnings in Texas, September 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 985644, 985645.