Isolated thunderstorms developed under a mid-level shortwave trough and along an outflow boundary. One of these storms produced large hail.
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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 developed under a mid-level shortwave trough and along an outflow boundary. One of these storms produced large hail.
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 Jun 15, 5:56 PM CST, 59 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Austin/San Antonio TX 656 PM CDT Tue Jun 15 2021 .UPDATE... Please see the 00Z aviation forecast discussion below. && .AVIATION... A few showers and storms continue across the region and based on recent radar trends, we will mention a TEMPO group for TSRA at SAT through 01Z. Otherwise, we expect convection to dissipate within the next 1-2 hours. We will keep the forecast VFR along with light southeast to east winds through the overnight hours. A few showers or storms may develop tomorrow afternoon, but current trends show this activity will remain near the coastal plains. && .PREV DISCUSSION... /ISSUED 251 PM CDT Tue Jun 15 2021/ SHORT TERM (Tonight through Wednesday Night)... Latest visible imagery are showing increased cloud coverage and more depth than an hour ago. Also, Doppler radar is detecting moderate to localized heavy showers associated with those cells showing vertical extend. This activity is moving to the southwest as the mean flow is from the northeast. Scattered showers and even isolated thunderstorms are expected across the area for the rest of this afternoon and early evening. These showers and storms will move quickly across the affected areas, however, a quick one tenth to one quarter inch of rainfall can't be ruled out. There is the potential for a few strong to severe storms mainly along and east of Highway 183 later this afternoon with main hazard being thunderstorm damaging winds of 60 mph or so. Once sunset comes around, the activity should come to an end or shortly after. Partly cloudy skies are expected tonight into Wednesday morning with lows in the upper 60s across the Hill Country to mid 70s across parts of the I-35 corridor and the southwest counties of the local area. On Wednesday expect highs in the mid to upper 90s across the area. It looks drier with only slight chance for rain across the far southeast and Coastal Plains area. The wind shifts to a more easterly flow across the area with speeds of 5 to 10 mph. LONG TERM (Thursday through Tuesday)... The end of the workweek and into the start of the upcoming weekend looks to remain fairly inactive across South-Central Texas as the region is anticipated to remain on the dry and subsident side of a tropical area of low pressure that advances northward across the western Gulf of Mexico. The National Hurricane Center with the latest outlook gives the feature a 80 percent chance of tropical development over the next 5 days. Model guidance continue to show signal that the system will likely be lopsided with the greatest rainfall and winds on its northern and eastern flank. While it does remain still a little too early to pinpoint where impacts and/or where the storm may move inland, its most likely to remain to the east of our region. With the lack of any other meaningful synoptic or mesoscale feature, expect continued hot conditions where the afternoon highs run near or slightly above climatological average under mostly sunny to partly cloudy skies. The forecast remains mainly rain free across the region besides some occasional slight chances for showers and/or thunderstorms across the eastern- southeastern counties, focused generally in the coastal plains. The hottest conditions throughout the long term are expected to occur Sunday into Monday as the 850 mb temperatures increase with the 500 mb flow becoming more north-northwesterly with also some subtle height increases following the wake of the tropical low as that feature accelerates east-northeastward as it feels influence from a passing shortwave moving across the midwest. Expect for conditions to approach and/or even exceed heat advisory criteria, especially Monday, with peak heat indices of between 105 to 110 degrees. A few locales may even exceed 110 degrees at times. Rain free conditions generally continue with any mentionable chances across the far southeastern counties. At the very end of the long term period into the middle of next week, despite notable model differences regarding the mid-level pattern, there is a signal for potential rainfall across South- Central Texas. Given the large uncertainty, I will keep near the National Blend of Models (NBM) output that indicates generally seasonable temperatures and POPs of around 20 to 30 percent. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 73 97 74 95 73 / - - 0 - 0 Austin Bergstrom Intl Airport 72 96 73 95 73 / - - 0 - 0 New Braunfels Muni Airport 73 97 72 96 72 / 10 - 0 - 0 Burnet Muni Airport 72 96 72 95 72 / 0 0 0 - 0 Del Rio Intl Airport 76 99 75 99 75 / 10 - 0 - 0 Georgetown Muni Airport 72 96 72 95 73 / - 0 0 - 0 Hondo Muni Airport 72 96 72 95 72 / 10 10 0 - 0 San Marcos Muni Airport 72 97 72 96 72 / 10 - 0 - 0 La Grange - Fayette Regional 75 97 74 96 73 / 20 - - 10 10 San Antonio Intl Airport 73 96 74 95 73 / 10 10 0 - 0 Stinson Muni Airport 75 97 75 96 74 / 20 10 0 - 0 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Short-Term/Aviation...Platt Long-Term...Oaks
Special Weather Statement National Weather Service Austin/San Antonio TX 435 PM CDT Tue Jun 15 2021 TXZ223-224-152215- De Witt TX-Gonzales TX- 435 PM CDT Tue Jun 15 2021 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DEWITT AND SOUTH CENTRAL GONZALES COUNTIES UNTIL 515 PM CDT... At 435 PM CDT, Doppler radar was tracking a strong thunderstorm near Cheapside, or 9 miles north of Cuero, moving southwest at 10 mph. Half inch hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Cuero, Cheapside, Westhoff, Edgar and Concrete. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 2934 9738 2925 9720 2899 9731 2913 9758 TIME...MOT...LOC 2135Z 029DEG 8KT 2924 9734 MO
Special Weather Statement
National Weather Service Austin/San Antonio TX
438 PM CDT Tue Jun 15 2021
TXZ209-225-152230-
Lavaca TX-Fayette TX-
438 PM CDT Tue Jun 15 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN FAYETTE AND NORTH
CENTRAL LAVACA COUNTIES UNTIL 530 PM CDT...
At 438 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Schulenburg, moving southwest at 15 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Schulenburg, Flatonia, Muldoon, Swiss Alp, Freyburg, Dubina, Moravia,
High Hill, Engle, O'Quinn, Floy, Ammannsville, Colony and Holman.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2963 9687 2962 9685 2951 9693 2977 9721
2990 9685 2974 9676
TIME...MOT...LOC 2138Z 064DEG 13KT 2979 9689
MOSpecial Weather Statement National Weather Service Austin/San Antonio TX 518 PM CDT Tue Jun 15 2021 TXZ222>224-152300- Karnes TX-De Witt TX-Gonzales TX- 518 PM CDT Tue Jun 15 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DEWITT... NORTHEASTERN KARNES AND SOUTH CENTRAL GONZALES COUNTIES UNTIL 600 PM CDT... At 518 PM CDT, Doppler radar was tracking a strong thunderstorm 8 miles southwest of Westhoff, or 10 miles northwest of Yorktown, moving southwest at 20 mph. Half inch hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Nordheim, Gillett, Cotton Patch, Gruenau, New Davy and Ecleto. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 2924 9757 2909 9745 2888 9764 2908 9786 TIME...MOT...LOC 2218Z 052DEG 18KT 2913 9758 MO
Special Weather Statement National Weather Service Austin/San Antonio TX 709 PM CDT Tue Jun 15 2021 TXZ205-160045- Bexar TX- 709 PM CDT Tue Jun 15 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BEXAR COUNTY UNTIL 745 PM CDT... At 709 PM CDT, Doppler radar was tracking a strong thunderstorm over San Antonio Int Airport, moving southwest at 15 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... San Antonio, San Antonio Int Airport, Leon Valley, Alamo Heights, Windcrest, Terrell Hills, Shavano Park, Hollywood Park, Olmos Park, Lackland AFB, Sea World, Castle Hills, Balcones Heights and Hill Country Village. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 2963 9850 2949 9837 2927 9862 2947 9879 TIME...MOT...LOC 0009Z 051DEG 15KT 2952 9850 MO
Special Weather Statement
National Weather Service Austin/San Antonio TX
714 PM CDT Tue Jun 15 2021
TXZ184-160100-
Edwards TX-
714 PM CDT Tue Jun 15 2021
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL EDWARDS COUNTY UNTIL 800
PM CDT...
At 712 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Rocksprings, moving south at 25 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Devil's Sinkhole State Natural Area, Farm to Market Road 335 and
State Highway 55.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Occasional cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3006 10000 2971 10005 2971 10006 2976 10032
3010 10014
TIME...MOT...LOC 0012Z 017DEG 23KT 3000 10009
PLATTSpecial Weather Statement National Weather Service Austin/San Antonio TX 740 PM CDT Tue Jun 15 2021 TXZ187-204-160115- Medina TX-Bandera TX- 740 PM CDT Tue Jun 15 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MEDINA AND SOUTHEASTERN BANDERA COUNTIES UNTIL 815 PM CDT... At 740 PM CDT, Doppler radar was tracking a strong thunderstorm near Bandera, moving southwest at 15 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Bandera, Hill Country State Natural Area, Bandera Falls, Lakehills and Lake Medina Shores. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 2976 9912 2968 9894 2941 9905 2954 9932 TIME...MOT...LOC 0040Z 029DEG 13KT 2966 9908 MO
The Austin/San Antonio radar (KEWX), 101 km away, was scanning. The volume nearest the first event began at 00:52 UTC.
1 hail. Local standard time, as filed.
A thunderstorm produced hail up to quarter size in Bandera. Most of the hail was nickel to dime size with a few stones the size of quarters.
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, June 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: 963480.