Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 151, NWS Austin/San Antonio, TX

May 28, 20219 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 28, 2021, 8:44 PM CDT for 9 counties in Texas. It was in force for 61 min. 7 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, 8:44 PM CDT (01:44 UTC)
Expired: May 28, 2021, 9:45 PM CDT
In force: 61 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Bandera County, TX, Bexar County, TX, Blanco County, TX, Comal County, TX, Kendall County, TX, Kerr County, TX, Medina County, TX, Real County, TX, Uvalde County, TX

The radar

The Austin/San Antonio radar (KEWX), 92 km from the middle of the area, began a volume at 01:45 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, 9:11 PM CDT	TSTM WND DMG	1 Ene Scenic Oaks, TX	LARGE TREE LIMBS AND POWER POLES BROKEN.
May 28, 9:32 PM CDT	TSTM WND GST 60	3 Ene Castle Hills, TX	MEASURED BY SAT ASOS.
May 28, 9:33 PM CDT	TSTM WND GST 77	3 Ene Castle Hills, TX	77 MPH GUST RECORDED AT SAT ASOS.
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

Del Rio, TX (KDRT), launched 00:00Z, 1.7 hours before the alert went out and 186 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: 3576 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1255 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 3.0
Supercell composite: 14.8

Open this sounding in Storm Lab

The text

As transmitted.

438 
WUUS54 KEWX 290144
SVREWX
TXC019-029-031-091-259-265-325-385-463-290245-
/O.NEW.KEWX.SV.W.0151.210529T0144Z-210529T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
844 PM CDT Fri May 28 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Central Medina County in south central Texas...
  Bandera County in south central Texas...
  Southern Kerr County in south central Texas...
  Northeastern Uvalde County in south central Texas...
  Southwestern Blanco County in south central Texas...
  Kendall County in south central Texas...
  Bexar County in south central Texas...
  Southeastern Real County in south central Texas...
  Western Comal County in south central Texas...

* Until 945 PM CDT.

* At 844 PM CDT, severe thunderstorms were located along a line
  extending from near Center Point to near Pipe Creek to near Hill
  Country State Natural Area to near Tuff, moving southeast at 40
  mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  San Antonio, Medina, Kerrville, Live Oak, Boerne, Hondo,
  Castroville, Comfort, Bandera, Leakey, Stinson Municipal Airport,
  Tarpley, San Antonio Int Airport, Vanderpool, Canyon Lake, Leon
  Valley, Helotes, Fair Oaks Ranch, Kirby and Alamo Heights.

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 3011 9856 2997 9826 2925 9842 2930 9918
      2945 9984 2989 9987 3012 9911
TIME...MOT...LOC 0144Z 308DEG 37KT 2994 9899 2975 9899 2968 9918 2979
9971

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

CP

2 follow-up statements

649 
WWUS54 KEWX 290210
SVSEWX

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

TXC031-385-463-290219-
/O.CAN.KEWX.SV.W.0151.000000T0000Z-210529T0245Z/
Uvalde TX-Blanco TX-Real TX-
910 PM CDT Fri May 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN UVALDE...
SOUTHWESTERN BLANCO AND SOUTHEASTERN REAL COUNTIES IS CANCELLED...

The storms which prompted the warning have weakened or 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 2930 9918 2976 9915 2994 9897 2998 9866
      2997 9845 2994 9841 2997 9837 2997 9826
      2925 9842
TIME...MOT...LOC 0209Z 304DEG 36KT 2986 9872 2964 9876 2956 9896 2967
9949

$$

TXC019-029-091-259-265-325-290245-
/O.CON.KEWX.SV.W.0151.000000T0000Z-210529T0245Z/
Medina TX-Bandera TX-Kerr TX-Kendall TX-Bexar TX-Comal TX-
910 PM CDT Fri May 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR NORTHEASTERN MEDINA...EASTERN BANDERA...SOUTHEASTERN KERR...
SOUTHERN KENDALL...BEXAR AND WESTERN COMAL COUNTIES...

At 909 PM CDT, severe thunderstorms were located along a line
extending from Walnut Grove to near Government Canyon State Natural
Area to near Mico to near Utopia, moving southeast at 40 mph.

HAZARD...80 mph wind gusts and ping pong ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
San Antonio, Live Oak, Boerne, Hondo, Castroville, Bandera, Stinson
Municipal Airport, San Antonio Int Airport, Canyon Lake, Leon Valley,
Helotes, Fair Oaks Ranch, Kirby, Alamo Heights, Windcrest, Terrell
Hills, Bulverde, Shavano Park, Hollywood Park and Cross Mountain.

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 2930 9918 2976 9915 2994 9897 2998 9866
      2997 9845 2994 9841 2997 9837 2997 9826
      2925 9842
TIME...MOT...LOC 0209Z 304DEG 36KT 2986 9872 2964 9876 2956 9896 2967
9949

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...70MPH
 
$$

CP

198 
WWUS54 KEWX 290221
SVSEWX

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

TXC265-290230-
/O.CAN.KEWX.SV.W.0151.000000T0000Z-210529T0245Z/
Kerr TX-
921 PM CDT Fri May 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN KERR 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 2928 9889 2969 9888 2998 9866 2997 9845
      2994 9841 2997 9837 2997 9826 2925 9842
TIME...MOT...LOC 0220Z 294DEG 47KT 2986 9865 2962 9861 2955 9879 

$$

TXC019-029-091-259-325-290245-
/O.CON.KEWX.SV.W.0151.000000T0000Z-210529T0245Z/
Medina TX-Bandera TX-Kendall TX-Bexar TX-Comal TX-
921 PM CDT Fri May 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR EAST CENTRAL MEDINA...EAST CENTRAL BANDERA...SOUTHEASTERN
KENDALL...BEXAR AND WESTERN COMAL COUNTIES...

At 920 PM CDT, severe thunderstorms were located along a line
extending from near Kreutzberg to near The Dominion to near Cliff,
moving southeast at 55 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
San Antonio, Live Oak, Boerne, Castroville, Stinson Municipal
Airport, San Antonio Int Airport, Canyon Lake, Leon Valley, Helotes,
Fair Oaks Ranch, Kirby, Alamo Heights, Windcrest, Terrell Hills,
Bulverde, Shavano Park, Hollywood Park, Cross Mountain, Olmos Park
and Lacoste.

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 2928 9889 2969 9888 2998 9866 2997 9845
      2994 9841 2997 9837 2997 9826 2925 9842
TIME...MOT...LOC 0220Z 294DEG 47KT 2986 9865 2962 9861 2955 9879 

HAIL...1.00IN
WIND...70MPH
 
$$

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, 8:48 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, 9:34 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Caldwell, Comal, Gonzales, Guadalupe, Hays and 2 more	56 min
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.