Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 120, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 11, 2021, 5:46 PM CDT for Bexar County, Medina County, Texas. It was in force for 44 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
- May 11, 2021, 5:46 PM CDT (22:46 UTC)
- Expired
- May 11, 2021, 6:30 PM CDT
- In force
- 44 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Bexar County, TX, Medina County, TX
The radar
The Austin/San Antonio radar (KEWX), 83 km from the middle of the area, began a volume at 22:46 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 |
|---|---|---|---|
| May 11, 6:08 PM CDT | HAIL 1 | 6 Ssw Sea World, TX | QUARTER SIZED HAIL REPORTED AT U.S. 90 AND MONTGOMERY RD. |
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 11, 3:41 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 10.8 hours before the alert went out and 197 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
- 1783 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 622 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 12.9
The text
As transmitted.
425 WUUS54 KEWX 112246 SVREWX TXC029-325-112330- /O.NEW.KEWX.SV.W.0120.210511T2246Z-210511T2330Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Austin/San Antonio TX 546 PM CDT Tue May 11 2021 The National Weather Service in Austin San Antonio has issued a * Severe Thunderstorm Warning for... East central Medina County in south central Texas... West central Bexar County in south central Texas... * Until 630 PM CDT. * At 545 PM CDT, a severe thunderstorm was located over Lacoste, or near Castroville, moving north at 25 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... San Antonio, Castroville, Helotes, Lytle, Lacoste, Cliff, Mico, Government Canyon State Natural Area, Rio Medina, Sea World, Von Ormy, Macdona and Mangus Corner. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 2924 9884 2954 9900 2960 9869 2927 9866 TIME...MOT...LOC 2245Z 165DEG 20KT 2931 9877 HAIL...1.00IN WIND...<50MPH $$ RUNYEN
1 follow-up statement
591
WWUS54 KEWX 112321
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
621 PM CDT Tue May 11 2021
TXC029-325-112330-
/O.CON.KEWX.SV.W.0120.000000T0000Z-210511T2330Z/
Medina TX-Bexar TX-
621 PM CDT Tue May 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR EAST CENTRAL MEDINA AND WEST CENTRAL BEXAR COUNTIES...
At 616 PM CDT, a severe thunderstorm was located near Cliff, or 8
miles north of Castroville, moving north at 25 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected. Already received a report
of a quarter sized hail at U.S. 90 and Montgomery Rd. The
latest radar scan shows the storm weakening, however, could
be producing penny sized hail. Will continue to monitor.
Locations impacted include...
San Antonio, Castroville, Helotes, Lacoste, Cliff, Government Canyon
State Natural Area, Mico, Rio Medina, Sea World and Macdona.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2929 9885 2954 9900 2960 9869 2932 9866
TIME...MOT...LOC 2314Z 165DEG 20KT 2947 9882
HAIL...1.00IN
WIND...<50MPH
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:14 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 16 min |
| May 10, 7:49 PM CDT | Areal Flood Advisory | EWX | Dimmit, Maverick | 3 hr |
| May 10, 7:55 PM CDT | Special Weather Statement | EWX | Kinney | 50 min |
| May 10, 8:00 PM CDT | Special Weather Statement | EWX | Dimmit, Maverick, Zavala | 45 min |
| May 10, 8:06 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kinney, Maverick, Real, Uvalde, Zavala | 54 min |
| May 10, 8:31 PM CDT | Tornado Warning | EWX | Kinney, Uvalde | 16 min |
| May 10, 8:52 PM CDT | Special Weather Statement | EWX | Frio, Zavala | 38 min |
| May 10, 8:58 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Edwards, Kerr, Kinney, Medina, Real and 1 more | 62 min |
| May 10, 9:09 PM CDT | Areal Flood Advisory | EWX | Dimmit, Zavala | 3 hr |
| May 10, 9:20 PM CDT | Areal Flood Advisory | EWX | Kinney, Maverick, Uvalde, Zavala | 3 hr |
| May 10, 9:30 PM CDT | Special Weather Statement | EWX | Frio, Medina | 60 min |
| May 10, 9:52 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina, Uvalde | 53 min |
| May 10, 10:42 PM CDT | Areal Flood Advisory | EWX | Medina, Uvalde | 3 hr |
| May 10, 10:45 PM CDT | Special Weather Statement | EWX | Bexar | 45 min |
| May 10, 11:17 PM CDT | Special Weather Statement | EWX | Bexar | 43 min |
| May 11, 3:51 PM CDT | Areal Flood Advisory | EWX | Kendall | 2 hr |
| May 11, 4:03 PM CDT | Special Weather Statement | EWX | Atascosa | 42 min |
| May 11, 4:23 PM CDT | Special Weather Statement | EWX | Caldwell | 52 min |
| May 11, 4:24 PM CDT | Special Weather Statement | EWX | Guadalupe | 51 min |
| May 11, 4:45 PM CDT | Special Weather Statement | EWX | Atascosa | 45 min |
| May 11, 4:59 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar, Wilson | 61 min |
| May 11, 5:20 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar | 25 min |
| May 11, 5:30 PM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Frio, Medina | 3 hr |
| May 11, 5:47 PM CDT | Special Weather Statement | EWX | Guadalupe | 43 min |
| May 11, 6:13 PM CDT | Special Weather Statement | EWX | Wilson | 47 min |
| May 11, 6:31 PM CDT | Special Weather Statement | EWX | Dimmit | 44 min |
| May 11, 6:36 PM CDT | Special Weather Statement | EWX | Frio, Medina | 39 min |
| May 11, 6:46 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales, Karnes, Wilson | 38 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.