Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 152, NWS Austin/San Antonio, TX

May 28, 20218 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 28, 2021, 9:34 PM CDT for 8 counties in Texas. It was in force for 56 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 28, 2021, 9:34 PM CDT (02:34 UTC)
Expired: May 28, 2021, 10:30 PM CDT
In force: 56 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 80.0 mph

Counties Bexar County, TX, Caldwell County, TX, Comal County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Kendall County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 9 km from the middle of the area, began a volume at 02:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 28, 9:35 PM CDT	TSTM WND DMG	1 N Windcrest, TX	NUMEROUS REPORTED OF TREE, FENCE, AND POWER LINE DAMAGE ACROSS THE NORTH AND NORTHEAST SIDE OF THE SAN ANTONIO METRO AREA.
May 28, 9:35 PM CDT	TSTM WND DMG	Olmos Park, TX	SMALL TREE LIMBS BROKEN.
May 28, 9:36 PM CDT	TSTM WND DMG	1 N Alamo Heights, TX	PICTURE OF A LARGE TREE THROUGH A HOME NEAR THE INTERSECTION OF BROADWAY AND WEST FAIR OAKS PLACE.
May 28, 9:39 PM CDT	TSTM WND DMG	Windcrest, TX	LARGE TREE TRUNK SNAPPED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 28, 6:20 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 2.6 hours before the alert went out and 222 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2506 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

362 
WUUS54 KEWX 290234
SVREWX
TXC029-055-091-177-187-209-259-493-290330-
/O.NEW.KEWX.SV.W.0152.210529T0234Z-210529T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
934 PM CDT Fri May 28 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Western Caldwell County in south central Texas...
  Southern Hays County in south central Texas...
  Guadalupe County in south central Texas...
  Western Gonzales County in south central Texas...
  East central Kendall County in south central Texas...
  Northern Wilson County in south central Texas...
  Central Bexar County in south central Texas...
  Comal County in south central Texas...

* Until 1030 PM CDT.

* At 933 PM CDT, severe thunderstorms were located along a line
  extending from near Guadalupe River State Park to near Timberwood
  Park to near Lackland AFB, moving east at 45 mph.

  These are very dangerous storms.

  HAZARD...80 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be heavily damaged. Expect 
           considerable damage to roofs, windows, and vehicles. 
           Extensive tree damage and power outages are likely.

* Locations impacted include...
  San Antonio, New Braunfels, San Marcos, Schertz, Kyle, Seguin,
  Cibolo, Universal City, Live Oak, Lockhart, Selma, Luling,
  Wimberley, Stockdale, Stinson Municipal Airport, San Antonio Int
  Airport, Randolph AFB, Canyon Lake Dam, Canyon Lake and Leon
  Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail, damaging winds, and continuous cloud to ground lightning
are occurring with these storms. Move indoors immediately. Lightning
is one of nature's leading killers. Remember, if you can hear
thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2921 9771 2922 9773 2918 9779 2927 9862
      2994 9855 2995 9842 2994 9841 2996 9839
      3004 9762 3000 9757
TIME...MOT...LOC 0233Z 271DEG 39KT 2991 9850 2968 9841 2941 9856 

HAIL...0.75IN
WIND...80MPH
 
$$

CP

2 follow-up statements

111 
WWUS54 KEWX 290248
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
948 PM CDT Fri May 28 2021

TXC259-290257-
/O.CAN.KEWX.SV.W.0152.000000T0000Z-210529T0330Z/
Kendall TX-
948 PM CDT Fri May 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL KENDALL COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 2921 9771 2922 9773 2918 9779 2927 9862
      2982 9855 2996 9839 3003 9772 3002 9771
      3003 9770 3004 9762 3000 9757
TIME...MOT...LOC 0247Z 274DEG 40KT 2987 9835 2964 9826 2937 9841 

$$

TXC029-055-091-177-187-209-493-290330-
/O.CON.KEWX.SV.W.0152.000000T0000Z-210529T0330Z/
Caldwell TX-Hays TX-Guadalupe TX-Gonzales TX-Wilson TX-Bexar TX-
Comal TX-
948 PM CDT Fri May 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR WESTERN CALDWELL...SOUTHERN HAYS...GUADALUPE...WESTERN
GONZALES...NORTHERN WILSON...CENTRAL BEXAR AND COMAL COUNTIES...

At 947 PM CDT, severe thunderstorms were located along a line
extending from near Spring Branch to Garden Ridge to near China
Grove, moving east at 45 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
San Antonio, New Braunfels, San Marcos, Schertz, Kyle, Seguin,
Cibolo, Universal City, Live Oak, Lockhart, Selma, Luling, Wimberley,
Stockdale, Stinson Municipal Airport, San Antonio Int Airport,
Randolph AFB, Canyon Lake Dam, Canyon Lake and Leon Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2921 9771 2922 9773 2918 9779 2927 9862
      2982 9855 2996 9839 3003 9772 3002 9771
      3003 9770 3004 9762 3000 9757
TIME...MOT...LOC 0247Z 274DEG 40KT 2987 9835 2964 9826 2937 9841 

HAIL...0.75IN
WIND...70MPH
 
$$

CP

948 
WWUS54 KEWX 290314
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
1014 PM CDT Fri May 28 2021

TXC029-290322-
/O.CAN.KEWX.SV.W.0152.000000T0000Z-210529T0330Z/
Bexar TX-
1014 PM CDT Fri May 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BEXAR COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled. However, rains will 
continue for the next hour or two. 

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for 
south central Texas.

LAT...LON 2921 9771 2922 9773 2918 9779 2924 9829
      2946 9812 2983 9816 3001 9790 3003 9772
      3002 9771 3004 9762 3000 9757
TIME...MOT...LOC 0312Z 282DEG 39KT 2980 9800 2952 9797 2921 9809 

$$

TXC055-091-177-187-209-493-290330-
/O.CON.KEWX.SV.W.0152.000000T0000Z-210529T0330Z/
Caldwell TX-Hays TX-Guadalupe TX-Gonzales TX-Wilson TX-Comal TX-
1014 PM CDT Fri May 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR WESTERN CALDWELL...SOUTHEASTERN HAYS...GUADALUPE...WESTERN
GONZALES...NORTHERN WILSON AND SOUTHEASTERN COMAL COUNTIES...

At 1012 PM CDT, severe thunderstorms were located along a line
extending from near Zorn to near Seguin to near Sutherland Springs,
moving east at 45 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
New Braunfels, San Marcos, Kyle, Seguin, Cibolo, Lockhart, Luling,
Stockdale, McQueeney, Nixon, La Vernia, Martindale, Uhland,
Kingsbury, Santa Clara, Niederwald, New Berlin, Staples, Pandora and
Fentress.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2921 9771 2922 9773 2918 9779 2924 9829
      2946 9812 2983 9816 3001 9790 3003 9772
      3002 9771 3004 9762 3000 9757
TIME...MOT...LOC 0312Z 282DEG 39KT 2980 9800 2952 9797 2921 9809 

HAIL...0.75IN
WIND...60MPH
 
$$

CP

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 7:01 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Lee, Travis, Williamson	59 min
May 28, 7:03 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real	57 min
May 28, 7:44 PM CDT	Tornado Warning	EWX	Bastrop, Caldwell, Fayette	31 min
May 28, 7:48 PM CDT	Areal Flood Advisory	EWX	Bastrop, Caldwell, Travis	3 hr
May 28, 7:49 PM CDT	Areal Flood Advisory	EWX	Blanco, Gillespie	3 hr
May 28, 7:49 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Gillespie, Kerr, Real	56 min
May 28, 7:56 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Fayette, Gonzales, Lee	64 min
May 28, 8:20 PM CDT	Areal Flood Advisory	EWX	Bandera, Gillespie, Kerr	3 hr
May 28, 8:24 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Bastrop, Travis	3 hr
May 28, 8:25 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Comal, Guadalupe, Hays	30 min
May 28, 8:28 PM CDT	Tornado Warning	EWX	Fayette	32 min
May 28, 8:38 PM CDT	Severe Thunderstorm Warning	EWX	Fayette, Lavaca, Lee	52 min
May 28, 8:44 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Blanco, Comal, Kendall, Kerr and 3 more	61 min
May 28, 8:48 PM CDT	Areal Flood Advisory	EWX	Atascosa, Bandera, Bexar, Comal, Kendall, Kerr and 1 more	3 hr
May 28, 8:58 PM CDT	Areal Flood Advisory	EWX	Bastrop, Fayette, Lee	5 hr
May 28, 8:58 PM CDT	Special Weather Statement	EWX	Gonzales, Guadalupe	47 min
May 28, 9:00 PM CDT	Areal Flood Advisory	EWX	Caldwell, Comal, Guadalupe, Hays	3 hr
May 28, 9:42 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Bexar, Comal, Guadalupe	3 hr
May 28, 10:23 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bastrop, Caldwell, DeWitt, Fayette, Gonzales and 5 more	21 min
May 28, 10:47 PM CDT	Special Weather Statement	EWX	DeWitt, Gonzales, Karnes, Lavaca	58 min
May 28, 10:50 PM CDT	River Flood Warning	EWX	Williamson	8 hr
May 28, 11:19 PM CDT	River Flood Warning	EWX	Blanco	7 hr
May 28, 11:56 PM CDT	Special Weather Statement	EWX	Bandera, Kendall, Kerr	34 min
May 29, 12:09 AM CDT	Special Weather Statement	EWX	Gillespie, Kerr	36 min
May 29, 12:28 AM CDT	Areal Flood Advisory	EWX	Bexar, Comal, Guadalupe	3 hr
May 29, 12:41 AM CDT	Special Weather Statement	EWX	Bandera, Kendall, Kerr	34 min
May 29, 1:11 AM CDT	Special Weather Statement	EWX	Comal, Kendall	49 min
May 29, 1:48 AM CDT	Special Weather Statement	EWX	Gonzales, Guadalupe	57 min
May 29, 2:11 AM CDT	Special Weather Statement	EWX	Val Verde	49 min
May 29, 2:21 AM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	54 min
May 29, 3:16 AM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Maverick, Val Verde	89 min
May 29, 3:20 AM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Real, Val Verde	70 min
May 29, 4:38 AM CDT	Special Weather Statement	EWX	Kinney, Uvalde	52 min
May 29, 4:46 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Real, Uvalde	27 min
May 29, 5:27 AM CDT	Special Weather Statement	EWX	Maverick, Zavala	48 min
May 29, 5:35 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick, Zavala	55 min
May 29, 5:54 AM CDT	Special Weather Statement	EWX	Atascosa, Frio, Medina	51 min
May 29, 6:28 AM CDT	Areal Flood Advisory	EWX	Bandera, Edwards, Kerr, Real	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.