Thunderstorms developed along a cold front. Some of these storms produced large hail and 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.
Thunderstorms developed along a cold front. Some of these storms produced large hail and 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 May 23, 1:15 PM CST, 2 hours 19 minutes earlier.
Area Forecast Discussion National Weather Service Austin/San Antonio TX 215 PM CDT Tue May 23 2017 .SHORT TERM (Tonight through Wednesday Night)... The cold front is currently beginning to enter our CWA and is best evident by pressure rises behind the frontal boundary. Winds ahead of the front are already out of a northerly direction as a boundary associated with a dying complex of storms this morning came through the area. This will decrease our surface convergence when the actual front makes it to the region. This should overall limit the coverage of showers and storms for the northern Hill Country for surface based activity. Storms will be more likely to fire across the southern half of the region where surface winds are lighter and convergence will be maximized. However, elevated showers and thunderstorms can be seen on area radars to our north and this activity is developing under the influence of strong lift as evident on water vapor imagery. This is evidence that we will have plenty of upper support for sustained convection later today. As the strong lift arrives, we could also see some elevated convection behind the front as well as any boundary layer convection that develops along the frontal boundary. CAPE values this afternoon will be in the 2000-3000 J/kg range with the higher values maximized across the eastern CWA. 0-6 km shear values near 50 knots will definitely support supercellular structures with any of the stronger activity. Large hail will initially be the main threat from any severe thunderstorms, but there could be some high wind reports as well especially later in the afternoon and evening. Thunderstorm chances will end from north to south in the late afternoon and evening. Cooler air is expected to filter into the region behind the front as is already evident by the near 60 degree temperatures in the Abilene region north of the front. Lows tonight should bottom out in the 50s for much of the area with some upper 40s even possible across low- lying areas in the Hill Country. The only record that could be broken tonight is Austin Bergstrom airport where the current forecast is 2 degrees under its record low. For tomorrow, clear skies will be in place across the region with light winds. Should be nice overall, with highs in the lower to middle 80s over much of the area. && .LONG TERM (Thursday through Tuesday)... The beginning of the long-term forecast will be dry with with increasing temperatures. Highs on Thursday will quickly be back into the lower 90s with even some upper 90s across the southwestern CWA. Temperatures will even be a couple of degrees warmer on Friday as an upper ridge builds to our south. Lows Friday morning will also be warm, in the lower to middle 70s. The upper air pattern will begin to shift on Saturday as a longwave trough begins to move through the central CONUS. Should see the first effects of this on Saturday night with some possible warm air advection activity ahead of an approaching cold frontal boundary. This frontal boundary will approach the CWA on Sunday and this will bring an increase to the precip chances to the area. It looks like a decent chance of showers and storms will remain in the area behind the front on Memorial Day and into Tuesday as southwest flow remains in place across the region. Will forecast 30-40 PoPs in this period for now, but these may have to be increased over the next several days. Instability amounts on Sunday could support some strong storms, but this could change as we near the weekend, and will continue to monitor the chances of stronger convection. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 56 85 64 91 74 / 30 0 0 - - Austin Bergstrom Intl Airport 55 84 61 91 74 / 30 0 0 - - New Braunfels Muni Airport 54 85 61 91 74 / 40 0 0 - - Burnet Muni Airport 52 83 61 90 72 / 10 0 0 - - Del Rio Intl Airport 57 86 64 94 74 / 10 0 0 - - Georgetown Muni Airport 54 83 62 91 74 / 30 0 0 - - Hondo Muni Airport 52 86 61 93 74 / 20 0 0 - - San Marcos Muni Airport 54 85 61 92 74 / 40 0 0 - - La Grange - Fayette Regional 55 84 62 90 74 / 50 0 0 - - San Antonio Intl Airport 55 86 64 92 74 / 30 0 0 - - Stinson Muni Airport 57 86 62 92 75 / 40 0 0 - - && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Mesoscale/Aviation...17 Synoptic/Grids...Hampshire Public Service/Data Collection...YB
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 525 AM CDT Tue May 23 2017 TXZ171>173-183>194-202>209-217>225-228-241030- 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- 525 AM CDT Tue May 23 2017 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. A final round of scattered showers and thunderstorms is expected mainly this afternoon across most of South Central Texas except for the Edwards Plateau. A few of these storms could be strong to severe, with large hail and damaging straight-line winds the main threats. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to relay severe weather reports to the National Weather Service.
Special Weather Statement National Weather Service Austin/San Antonio TX 412 PM CDT TUE MAY 23 2017 TXZ171-172-232145- Llano TX-Burnet TX- 412 PM CDT TUE MAY 23 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LLANO AND WEST CENTRAL BURNET COUNTIES UNTIL 445 PM CDT... At 412 PM CDT, Doppler radar was tracking a strong thunderstorm over Lone Grove, or 7 miles northeast of Llano, moving east at 45 mph. Nickel size hail will be possible with this storm. Locations impacted include... Kingsland, Burnet, Llano, Bertram, Buchanan Dam, Inks Lake State Park, Lone Grove, Stolz, Bluffton, Oatmeal, Tow and Shady Grove. A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for south central Texas. LAT...LON 3071 9866 3089 9864 3089 9804 3062 9807 TIME...MOT...LOC 2112Z 275DEG 41KT 3080 9857 RUNYEN
Special Weather Statement
National Weather Service Austin/San Antonio TX
416 PM CDT TUE MAY 23 2017
TXZ203-218-232145-
Uvalde TX-Zavala TX-
416 PM CDT TUE MAY 23 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN UVALDE AND NORTHWESTERN
ZAVALA COUNTIES UNTIL 445 PM CDT...
At 416 PM CDT, Doppler radar was tracking a strong thunderstorm near
Uvalde Estates, or near Uvalde, moving southeast at 25 mph.
Nickel size hail will be possible with this storm.
Locations impacted include...
Uvalde, La Pryor, Uvalde Estates, Dabney, Blewett, Washer and Knippa.
LAT...LON 2918 10010 2935 9996 2922 9956 2892 9979
2904 10010
TIME...MOT...LOC 2116Z 298DEG 21KT 2920 9987
RUNYENSpecial Weather Statement
National Weather Service Austin/San Antonio TX
428 PM CDT TUE MAY 23 2017
TXZ205-232200-
Bexar TX-
428 PM CDT TUE MAY 23 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN BEXAR COUNTY UNTIL 500
PM CDT...
At 428 PM CDT, Doppler radar was tracking a strong thunderstorm just
west of Lackland AFB, or 10 miles southwest of San Antonio, moving
east at 45 mph.
Dime size hail will be possible with this storm.
Locations impacted include...
San Antonio, Stinson Municipal Airport, St. Hedwig, Elmendorf,
Lackland AFB, Calaveras Lake, Sea World, Brooks City Base, Von Ormy,
Mitchell Lake, Martinez, Macdona, Parita, Losoya, Southton, Sayers,
Mangus Corner, Adkins, Buena Vista and Braunig Lake.
A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
south central Texas.
LAT...LON 2933 9879 2949 9878 2942 9815 2926 9828
2919 9834
TIME...MOT...LOC 2128Z 283DEG 41KT 2939 9866
RUNYENThe Laughlin AFB radar (KDFX), 46 km away, was scanning. The volume nearest the first event began at 21:33 UTC.
15 hail, 7 thunderstorm wind, 1 tornado. Local standard time, as filed.
A thunderstorm produced wind gusts estimated at 65 mph knocking down power lines across Hwy 83 south of Uvalde.
A thunderstorm produced quarter size hail near I-35 and Hwy 45 in Round Rock.
A thunderstorm produced quarter size hail in Pflugerville.
A thunderstorm produced wind gusts estimated at 75 mph that snapped a large tree in half in Round Rock.
A thunderstorm produced quarter size hail northeast of Pflugerville.
A thunderstorm produced golf ball size hail along Hwy 181 northwest of Floresville.
A thunderstorm produced quarter size hail in the town of Atascosa.
A thunderstorm produced quarter size hail in Somerset.
A thunderstorm produced quarter size hail along Hwy 290 just west of Elgin.
A thunderstorm produced wind gusts estimated at 60 mph that knocked down small tree limbs in Elgin.
A thunderstorm produced wind gusts estimated at 75 mph that blew down trees and power lines in Elgin.
A NWS storm survey found that a tornado was produced by the bookend vortex |of a bow echo that moved through the city of Elgin on the afternoon|of May 23rd 2017. The tornado began just east of Texas Highway 95|and just north of Roemer Road, where it displaced and flipped a shed |off its foundation. The tornado then caused extensive damage to a|business along Roemer Road. As it continued to the east-southeast,|the tornado ripped the metal roof off a large barn and caused roof|damage to a well-built home adjacent to the barn. In the pasture |adjacent to these structures, there were multiple pieces of splintered |wood that were driven into the ground from the opposite direction from |which the storm came. Several cattle and a bull were reportedly thrown |about 1500 feet from one pasture into another, jumping a couple of fences |in the process. The tornado then completely destroyed an old wooden barn |just north of Roemer Road. At this point, the tornado was approximately |moving along Roemer Road, and caused some minor tree damage. The tornado |then crossed Red Town Road just south of Roemer Road and ended just east |of Red Town Road, where it caused some minor damage to a structure.
A thunderstorm produced golf ball size hail east of Elgin.
A thunderstorm produced hail slightly larger than quarters in Paige.
A thunderstorm produced half dollar size hail that accumulated on the ground in Paige. A house was damaged by the wind driven hail.
A thunderstorm produced half dollar size hail in Giddings.
A thunderstorm produced wind gusts measured at 75 mph in Giddings. The gusty winds were accompanied with quarter size hail.
A thunderstorm produced quarter size hail in Giddings. The hail was accompanied by winds gusts estimated at 75 mph.
A thunderstorm produced wind gusts estimated at 70 mph that snapped large Oak trees on the south side of Giddings.
A thunderstorm produced quarter size hail along I-37 near Leming.
A thunderstorm produced quarter size hail at Cabela's in Buda.
A thunderstorm produced wind gusts estimated at 60 mph that damaged trees west of Warrenton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2017Every state in 2017This day in weather historyThe tornado archive for Texas, 2017Warnings in Texas, May 2017
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: 697554, 697555, 697556, 697557, 697558, 697559, 697560, 697561, 697562, 697563, 697564, 697565, 700038, 697566, 697567, 697568, 697569, 697570, 697575, 697571, 697572, 697573, 697574.