Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 55, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 23, 2021, 7:16 PM CDT for Bexar County, Wilson County, Texas. It was in force for 29 min. 1 report 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, 7:16 PM CDT (00:16 UTC)
- Expired
- Apr 23, 2021, 7:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bexar County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 52 km from the middle of the area, began a volume at 00:20 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, 7:42 PM CDT | HAIL 0.5 | 3 Ene Calaveras Lake, TX | REPORT FROM MPING: HALF-INCH (0.50 IN.). |
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, 7:05 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 0.3 hours before the alert went out and 205 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
- 1602 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 883 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted.
443
WUUS54 KEWX 240016
SVREWX
TXC029-493-240045-
/O.NEW.KEWX.SV.W.0055.210424T0016Z-210424T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
716 PM CDT Fri Apr 23 2021
The National Weather Service in Austin San Antonio has issued a
* Severe Thunderstorm Warning for...
Northwestern Wilson County in south central Texas...
Southeastern Bexar County in south central Texas...
* Until 745 PM CDT.
* At 716 PM CDT, a severe thunderstorm was located over China Grove,
or near Stinson Municipal Airport, moving east at 25 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, Stinson Municipal Airport, Kirby, Olmos Park, St.
Hedwig, Elmendorf, La Vernia, China Grove, Calaveras Lake,
Martinez, Parita, Southton, Sayers, Brooks City Base and Adkins.
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 2932 9853 2947 9848 2944 9814 2916 9816
TIME...MOT...LOC 0016Z 289DEG 21KT 2936 9838
HAIL...1.00IN
WIND...60MPH
$$
BRADY1 follow-up statement
773
WWUS54 KEWX 240029
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
729 PM CDT Fri Apr 23 2021
TXC029-493-240045-
/O.CON.KEWX.SV.W.0055.000000T0000Z-210424T0045Z/
Wilson TX-Bexar TX-
729 PM CDT Fri Apr 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHWESTERN WILSON AND SOUTHEASTERN BEXAR COUNTIES...
At 729 PM CDT, a severe thunderstorm was located over Calaveras Lake,
or 9 miles east of Stinson Municipal Airport, moving southeast at 20
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
St. Hedwig, Elmendorf, La Vernia, Calaveras Lake, Parita and Sayers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2927 9841 2937 9839 2938 9814 2916 9816
TIME...MOT...LOC 0029Z 302DEG 19KT 2932 9832
HAIL...1.00IN
WIND...60MPH
$$
BRADYThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 7:32 PM CDT | Special Weather Statement | EWX | Guadalupe | 43 min |
| Apr 23, 7:39 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Karnes | 51 min |
| Apr 23, 7:42 PM CDT | Severe Thunderstorm Warning | EWX | Bexar, Wilson | 48 min |
| Apr 23, 8:14 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales, Karnes, Wilson | 46 min |
| Apr 23, 8:31 PM CDT | Special Weather Statement | EWX | Karnes | 44 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.