Alert archive / Texas / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 91, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 30, 2012, 10:18 PM CDT for Gillespie County, Llano County, Texas. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 30, 2012, 10:18 PM CDT (03:18 UTC)
- Expired
- May 30, 2012, 11:01 PM CDT
- In force
- 43 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties Gillespie County, TX, Llano County, TX
The radar
The Austin/San Antonio radar (KEWX), 118 km from the middle of the area, began a volume at 03:20 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.
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 30, 5:11 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 3.3 hours before the alert went out and 218 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
- 2015 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 2271 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
999
WUUS54 KEWX 310318
SVREWX
TXC171-299-310415-
/O.NEW.KEWX.SV.W.0091.120531T0318Z-120531T0415Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1018 PM CDT WED MAY 30 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
GILLESPIE COUNTY...
SOUTHWESTERN LLANO COUNTY...
* UNTIL 1115 PM CDT.
* AT 1015 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 8 MILES NORTH OF
DOSS...OR 14 MILES SOUTH OF MASON...AND MOVING SOUTHEAST AT 25 MPH.
* SOME LOCATIONS IN THE WARNING INCLUDE CHERRY SPRING...ENCHANTED
ROCK STATION...HILLTOP...CRABAPPLE...TIVYDALE...ROCKY HILL AND
FREDERICKSBURG.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A VERY DANGEROUS SEVERE THUNDERSTORMS WITH A HISTORY OF
PRODUCING TORNADOES. A TORNADO WATCH REMAINS IN EFFECT UNTIL
MIDNIGHT CDT THURSDAY MORNING FOR SOUTH CENTRAL TEXAS.
&&
LAT...LON 3027 9860 3014 9914 3051 9927 3050 9898
3061 9897 3061 9896
TIME...MOT...LOC 0318Z 320DEG 23KT 3054 9915
$$2 follow-up statements
110
WWUS54 KEWX 310347
SVSEWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1047 PM CDT WED MAY 30 2012
TXC171-299-310415-
/O.CON.KEWX.SV.W.0091.000000T0000Z-120531T0415Z/
GILLESPIE TX-LLANO TX-
1047 PM CDT WED MAY 30 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR SOUTHWESTERN LLANO AND NORTHEASTERN GILLESPIE COUNTIES...
AT 1041 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH
AND NICKEL SIZE HAIL. THIS STORM WAS LOCATED NEAR CHERRY SPRING...OR
16 MILES NORTHWEST OF FREDERICKSBURG...MOVING SOUTHEAST AT 25 MPH.
OTHER LOCATIONS IN THE WARNING AREA INCLUDE HILLTOP AND CRABAPPLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY MORNING
FOR SOUTH CENTRAL TEXAS.
&&
LAT...LON 3027 9860 3023 9897 3051 9920 3050 9898
3061 9897 3061 9896
TIME...MOT...LOC 0346Z 312DEG 21KT 3046 9897
$$958
WWUS54 KEWX 310401
SVSEWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1101 PM CDT WED MAY 30 2012
TXC171-299-310411-
/O.CAN.KEWX.SV.W.0091.000000T0000Z-120531T0415Z/
GILLESPIE TX-LLANO TX-
1101 PM CDT WED MAY 30 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LLANO AND
NORTHEASTERN GILLESPIE COUNTIES IS CANCELLED...
THE THUNDERSTORM THAT MOVED FROM MASON COUNTY INTO NORTHERN
GILLESPIE AND SOUTHWESTERN LLANO COUNTY HAS WEAKENED TO BELOW SEVERE
LEVELS.
LAT...LON 3027 9860 3023 9897 3051 9920 3050 9898
3061 9897 3061 9896
TIME...MOT...LOC 0401Z 312DEG 21KT 3040 9889
$$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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.