Thunderstorms developed along a cold front. Some of these storms produced heavy rain that fell in areas that had received significant rain in the previous two days.
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.
Thunderstorms developed along a cold front. Some of these storms produced heavy rain that fell in areas that had received significant rain in the previous two days. This additional rain led to flash flooding.
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 Oct 15, 2:08 PM CST, 1 hour 17 minutes earlier.
Area Forecast Discussion National Weather Service Austin/San Antonio TX 308 PM CDT Fri Oct 15 2021 .SHORT TERM (Tonight through Saturday Night)... A cold front is pushing across the area this afternoon with a broken line of showers and thunderstorms along it and extending from Taylor southwestward to Sisterdale to Brackettville as of 230 pm. The front is forecast to continue to push to the southeast at around 15 to 20 mph the rest of this afternoon. Having said that, the wind shift associated with the front is expected to occur across the Austin and San Antonio metro areas between 3 and 330 pm. Isolated to scattered showers and isolated thunderstorms are expected as the front pushes to the southeast for the rest of the afternoon. The cold front should clear out our CWA by 6 or 7 pm this evening. In the wake of the front expect breezy northerly winds and gusts of 20 to 30 mph. Winds are forecast to relax a bit this evening but staying around the 10 to 12 mph range with occasional gusts up to 20 mph during the tonight period. A drier and cooler airmass will spread across the region tonight into the weekend with low temperatures in the 40s across the Hill Country on Saturday and Sunday mornings and 50s elsewhere. As far as highs go, 70s for most areas. In summary, a nice and pleasant weekend awaits with rain-free conditions and great outdoor activity temperatures. && .LONG TERM (Sunday through Friday)... Dry weather along with below normal temperatures can be expected through the remainder of this weekend into early next week. We will see a return of southerly flow in the low-levels late Monday and this will help to push temperatures up slightly compared to the weekend. However, temperatures are still expected to remain below normal on Monday, then warm to near normal levels on Tuesday. The warming trend continues on Wednesday and Thursday, with the next cold front expected either late Thursday or early Friday. We could see some showers and storms as the front moves through, but the operational models certainly differ with respect to how much rainfall we could see and when the best chance will occur. For now, we will keep rain chances low with Thursday being favored slightly over Friday. Some cooler air will filter in behind the front with temperatures easing back to a few degrees below climatological normals on Friday. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 54 72 51 73 49 / 0 0 0 0 0 Austin Bergstrom Intl Airport 54 72 48 72 43 / 0 0 0 0 0 New Braunfels Muni Airport 55 73 49 73 49 / 0 0 0 0 0 Burnet Muni Airport 51 71 47 72 48 / 0 0 0 0 0 Del Rio Intl Airport 59 77 54 76 53 / 0 0 0 0 0 Georgetown Muni Airport 53 72 45 72 48 / 0 0 0 0 0 Hondo Muni Airport 54 74 49 74 49 / 0 0 0 0 0 San Marcos Muni Airport 54 73 48 73 48 / 0 0 0 0 0 La Grange - Fayette Regional 57 74 50 75 50 / 0 0 0 0 0 San Antonio Intl Airport 57 72 51 72 51 / 0 0 0 0 0 Stinson Muni Airport 59 75 53 75 53 / 0 0 0 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Short-Term/Aviation...17 Long-Term...Platt Decision Support...Morris
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 128 PM CDT Fri Oct 15 2021 TXZ171>173-183>194-202>209-217>225-228-161830- 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- 128 PM CDT Fri Oct 15 2021 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...This Afternoon And Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
Special Weather Statement
National Weather Service Austin/San Antonio TX
334 PM CDT Fri Oct 15 2021
TXZ205-152115-
Bexar TX-
334 PM CDT Fri Oct 15 2021
...A strong thunderstorm will impact portions of central Bexar County
through 415 PM CDT...
At 334 PM CDT, Doppler radar was tracking a strong thunderstorm over
Sea World, or 8 miles west of San Antonio, moving east at 25 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
San Antonio, Universal City, Live Oak, Selma, Stinson Municipal
Airport, San Antonio Int Airport, Leon Valley, Helotes, Kirby, Alamo
Heights, Windcrest, Terrell Hills, Shavano Park, Olmos Park, China
Grove, Lackland AFB, Sea World, Converse, Castle Hills and Balcones
Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 2938 9875 2956 9873 2958 9831 2931 9835
TIME...MOT...LOC 2034Z 276DEG 21KT 2947 9866
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
HAMPSHIREThe Austin/San Antonio radar (KEWX), 62 km away, was scanning. The volume nearest the first event began at 21:24 UTC.
1 flash flood. Local standard time, as filed.
Thunderstorms produced 1.81 inches of rain in just over an hour in western Bexar County where significant rain had fallen in the previous two days. This new rain flooded five low water crossings and caused urban street flooding.
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, October 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: 988048.