Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 53, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 23, 2021, 6:45 PM CDT for Bexar County, Comal County, Guadalupe County, Texas. It was in force for 45 min. 3 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
- Apr 23, 2021, 6:45 PM CDT (23:45 UTC)
- Expired
- Apr 23, 2021, 7:30 PM CDT
- In force
- 45 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bexar County, TX, Comal County, TX, Guadalupe County, TX
The radar
The Austin/San Antonio radar (KEWX), 40 km from the middle of the area, began a volume at 23:46 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 |
|---|---|---|---|
| Apr 23, 7:03 PM CDT | HAIL 0.5 | Alamo Heights, TX | PUBLIC REPORT OF NUMEROUS HAIL STONES OF AT LEAST PEA SIZE, WITH SEVERAL HALF INCH SIZED HAIL STONES. |
| Apr 23, 7:08 PM CDT | HAIL 1 | 3 Nw San Antonio, TX | TWITTER PICTURE OF HAIL UP TO QUARTER SIZE. |
| Apr 23, 7:12 PM CDT | HAIL 1 | 1 Wsw San Antonio, TX | REPORT OF QUARTER SIZE HAIL AT PINKERTONS BBQ IN DOWNTOWN SAN ANTONIO. |
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 |
|---|---|---|---|
| Apr 23, 12:37 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 11.8 hours before the alert went out and 213 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.
- Mixed-layer CAPE
- 1041 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 520 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.1
The text
As transmitted.
196
WUUS54 KEWX 232345
SVREWX
TXC029-091-187-240045-
/O.NEW.KEWX.SV.W.0053.210423T2345Z-210424T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
645 PM CDT Fri Apr 23 2021
The National Weather Service in Austin San Antonio has issued a
* Severe Thunderstorm Warning for...
Southwestern Guadalupe County in south central Texas...
Central Bexar County in south central Texas...
South central Comal County in south central Texas...
* Until 745 PM CDT.
* At 644 PM CDT, a severe thunderstorm was located over San Antonio,
moving east at 30 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, New Braunfels, Schertz, Cibolo, Universal City, Live
Oak, Selma, San Antonio Int Airport, Randolph AFB, Leon Valley,
Kirby, Alamo Heights, Windcrest, Terrell Hills, Garden Ridge,
Hollywood Park, Olmos Park, St. Hedwig, China Grove and Marion.
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 this storm. 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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2936 9861 2949 9865 2977 9823 2939 9794
2938 9812 2944 9814 2938 9819
TIME...MOT...LOC 2344Z 256DEG 24KT 2944 9854
HAIL...1.00IN
WIND...60MPH
$$
BRADY2 follow-up statements
663
WWUS54 KEWX 240010
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
710 PM CDT Fri Apr 23 2021
TXC029-091-187-240045-
/O.CON.KEWX.SV.W.0053.000000T0000Z-210424T0045Z/
Guadalupe TX-Bexar TX-Comal TX-
710 PM CDT Fri Apr 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHWESTERN GUADALUPE...NORTHEASTERN BEXAR AND SOUTH CENTRAL
COMAL COUNTIES...
At 710 PM CDT, a severe thunderstorm was located near Terrell Hills,
or near San Antonio, moving east at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Public.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
San Antonio, New Braunfels, Schertz, Cibolo, Universal City, Live
Oak, Selma, San Antonio Int Airport, Randolph AFB, Kirby, Alamo
Heights, Windcrest, Terrell Hills, Garden Ridge, Olmos Park, St.
Hedwig, China Grove, Marion, Santa Clara and New Berlin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2936 9853 2953 9851 2973 9821 2944 9798
2939 9794 2938 9812 2944 9814 2938 9819
TIME...MOT...LOC 0010Z 276DEG 13KT 2942 9844
HAIL...1.00IN
WIND...60MPH
$$
BRADY613
WWUS54 KEWX 240030 RRA
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
730 PM CDT Fri Apr 23 2021
TXC029-091-187-240040-
/O.CAN.KEWX.SV.W.0053.000000T0000Z-210424T0045Z/
Guadalupe TX-Bexar TX-Comal TX-
730 PM CDT Fri Apr 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GUADALUPE...
NORTHEASTERN BEXAR AND SOUTH CENTRAL COMAL COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However small hail, gusty
winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
south central Texas.
LAT...LON 2936 9853 2953 9851 2973 9821 2944 9798
2939 9794 2938 9812 2944 9814 2938 9819
TIME...MOT...LOC 0028Z 256DEG 24KT 2945 9829
$$
BRADYThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 12:19 PM CDT | Special Weather Statement | EWX | Comal | 41 min |
| Apr 23, 12:59 PM CDT | Special Weather Statement | EWX | Hays | 31 min |
| Apr 23, 1:17 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Guadalupe | 23 min |
| Apr 23, 1:31 PM CDT | Areal Flood Advisory | EWX | Caldwell, Guadalupe | 3 hr |
| Apr 23, 1:43 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Travis | 25 min |
| Apr 23, 2:03 PM CDT | Areal Flood Advisory | EWX | Bastrop, Travis | 3 hr |
| Apr 23, 3:29 PM CDT | Areal Flood Advisory | EWX | Bastrop, Lee | 3 hr |
| Apr 23, 4:15 PM CDT | Special Weather Statement | EWX | Maverick | 30 min |
| Apr 23, 4:39 PM CDT | Severe Thunderstorm Warning | EWX | Maverick, Zavala | 51 min |
| Apr 23, 5:25 PM CDT | Special Weather Statement | EWX | Zavala | 50 min |
| Apr 23, 6:05 PM CDT | Special Weather Statement | EWX | Frio | 55 min |
| Apr 23, 6:29 PM CDT | Special Weather Statement | EWX | Bexar | 61 min |
| Apr 23, 6:52 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Frio | 53 min |
| Apr 23, 6:59 PM CDT | Special Weather Statement | EWX | Atascosa | 61 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2021Every 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.