Alert archive / Texas / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 67, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 7, 2012, 6:49 PM CDT for Blanco County, Gillespie County, Kendall County, Texas. It was in force for 56 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
- May 7, 2012, 6:49 PM CDT (23:49 UTC)
- Expired
- May 7, 2012, 7:45 PM CDT
- In force
- 56 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties Blanco County, TX, Gillespie County, TX, Kendall County, TX
The radar
The Austin/San Antonio radar (KEWX), 71 km from the middle of the area, began a volume at 23:49 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 7, 7:00 PM CDT | HAIL 1 | 2 Ese Sisterdale, TX | |
| May 7, 7:00 PM CDT | HAIL 1.75 | 6 N Sisterdale, TX | |
| May 7, 7:20 PM CDT | HAIL 1 | 1 W Sisterdale, TX | NICKEL TO QUARTER SIZE HAIL AND WINDS GUSTING OVER 50 MPH. |
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 7, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 11.8 hours before the alert went out and 235 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
- 3104 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
493 WUUS54 KEWX 072349 SVREWX TXC031-171-259-080045- /O.NEW.KEWX.SV.W.0067.120507T2349Z-120508T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 649 PM CDT MON MAY 7 2012 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN BLANCO COUNTY... SOUTHEASTERN GILLESPIE COUNTY... NORTHERN KENDALL COUNTY... * UNTIL 745 PM CDT. * AT 645 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ROCKY HILL...OR 7 MILES SOUTHEAST OF FREDERICKSBURG...AND MOVING SOUTHEAST AT 25 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE BANKERSMITH...LUCKENBACH... STONEWALL...LBJ STATE PARK...HYE...ALBERT...ROCKY CREEK...JOHNSON CITY...WARING...SISTERDALE...WELFARE...NELSON CITY...FLUGRATH... BLANCO AND KENDALIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 3028 9830 2993 9846 2986 9891 3033 9889 TIME...MOT...LOC 2349Z 317DEG 21KT 3020 9876 $$
2 follow-up statements
091
WWUS54 KEWX 080019
SVSEWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
719 PM CDT MON MAY 7 2012
TXC031-171-080029-
/O.CAN.KEWX.SV.W.0067.000000T0000Z-120508T0045Z/
GILLESPIE TX-BLANCO TX-
719 PM CDT MON MAY 7 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BLANCO AND
SOUTHEASTERN GILLESPIE COUNTIES IS CANCELLED...
THE THUNDERSTORM WILL REMAIN IN KENDALL COUNTY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
MONDAY EVENING FOR SOUTH CENTRAL TEXAS.
LAT...LON 3009 9882 3011 9872 3012 9860 2993 9846
2986 9891
TIME...MOT...LOC 0019Z 317DEG 21KT 3007 9862
$$
TXC259-080045-
/O.CON.KEWX.SV.W.0067.000000T0000Z-120508T0045Z/
KENDALL TX-
719 PM CDT MON MAY 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHERN KENDALL COUNTY...
AT 717 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 10 MILES NORTHEAST
OF SISTERDALE...OR 13 MILES WEST OF BLANCO...MOVING SOUTHEAST AT 25
MPH.
SOME LOCATIONS IN THE WARNING AREA INCLUDE WELFARE...CROWN...NELSON
CITY AND KENDALIA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
MONDAY EVENING FOR SOUTH CENTRAL TEXAS.
&&
LAT...LON 3009 9882 3011 9872 3012 9860 2993 9846
2986 9891
TIME...MOT...LOC 0019Z 317DEG 21KT 3007 9862
$$814
WWUS54 KEWX 080041
SVSEWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
741 PM CDT MON MAY 7 2012
TXC259-080050-
/O.EXP.KEWX.SV.W.0067.000000T0000Z-120508T0045Z/
KENDALL TX-
741 PM CDT MON MAY 7 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN KENDALL COUNTY WILL
EXPIRE AT 745 PM CDT...
THE THUNDERSTORM IS WEAKENING BELOW SEVERE LEVELS. AS A RESULT...THE
WARNING WILL BE ALLOW TO EXPIRE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
MONDAY EVENING FOR SOUTH CENTRAL TEXAS.
LAT...LON 3009 9882 3011 9872 3012 9860 2993 9846
2986 9891
TIME...MOT...LOC 0040Z 317DEG 21KT 2998 9852
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 7:09 PM CDT | Areal Flood Advisory | EWX | Llano | 111 min |
| May 6, 7:33 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 42 min |
| May 7, 3:28 AM CDT | Flash Flood Watch | EWX | Bandera, Bexar, Blanco, Burnet, Comal, Edwards and 12 more | 37 hr |
| May 7, 4:47 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 58 min |
| May 7, 5:10 PM CDT | Tornado Warning | EWX | Llano | 35 min |
| May 7, 5:23 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 37 min |
| May 7, 5:32 PM CDT | Tornado Warning | EWX | Gillespie, Llano | 28 min |
| May 7, 5:43 PM CDT | Tornado Warning | EWX | Llano | 32 min |
| May 7, 5:57 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Burnet, Gillespie, Llano | 63 min |
| May 7, 6:08 PM CDT | Areal Flood Advisory | EWX | Llano | 112 min |
| May 7, 6:51 PM CDT | Areal Flood Advisory | EWX | Gillespie | 2 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2012Every severe thunderstorm warning in 2012
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.