Alert archive / Texas / Tornado Warnings in 2011
Tornado Warning 1, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this tornado warning at Apr 21, 2011, 11:50 PM CDT for Val Verde County, Texas. It was in force for 26 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 21, 2011, 11:50 PM CDT (04:50 UTC)
- Expired
- Apr 22, 2011, 12:16 AM CDT
- In force
- 26 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
County Val Verde County, TX
The radar
The Laughlin AFB radar (KDFX), 85 km from the middle of the area, began a volume at 04:53 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 22, 12:01 AM CDT | HAIL 0.25 | 8 Sse Comstock, TX | PEA SIZE HAIL... SOME RAIN AND HIGH WINDS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 4.8 hours before the alert went out and 32 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
- 2280 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 2009 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
632 WFUS54 KEWX 220450 TOREWX TXC465-220530- /O.NEW.KEWX.TO.W.0001.110422T0450Z-110422T0530Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1150 PM CDT THU APR 21 2011 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * TORNADO WARNING FOR... VAL VERDE COUNTY... * UNTIL 1230 AM CDT. * AT 1148 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 12 MILES WEST OF ROUGH CANYON REC AREA...OR ABOUT 9 MILES SOUTH OF COMSTOCK...MOVING EAST AT 5 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE DEVILS SHORES. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN A MOBILE HOME OR VEHICLE...GET OUT AND GO TO A STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 2962 10121 2964 10090 2946 10088 2951 10122 TIME...MOT...LOC 0451Z 275DEG 6KT 2955 10118 $$
1 follow-up statement
854 WWUS54 KEWX 220516 SVSEWX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1216 AM CDT FRI APR 22 2011 TXC465-220525- /O.CAN.KEWX.TO.W.0001.000000T0000Z-110422T0530Z/ VAL VERDE TX- 1216 AM CDT FRI APR 22 2011 ...THE TORNADO WARNING FOR VAL VERDE COUNTY IS CANCELLED... THE THUNDERSTORM THAT PROMPTED THE TORNADO WARNING IS WEAKENING RAPIDLY AND NO LONGER POSES A THREAT FOR TORNADOES. HAIL TO THE SIZE OF NICKELS AND WINDS IN EXCESS OF 55 MPH ARE STILL POSSIBLE FROM THIS THUNDERSTORM. LAT...LON 2962 10121 2964 10090 2946 10088 2951 10122 TIME...MOT...LOC 0515Z 242DEG 13KT 2961 10106 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 7:54 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 36 min |
| Apr 21, 10:46 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 59 min |
| Apr 21, 11:42 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 37 min |
Nearby
Tornado Warnings in Texas, 2011Every tornado warning in 2011Tornadoes in 2011
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.