Alert archive / Texas / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 99, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 1, 2012, 5:01 PM CDT for Atascosa County, Texas. It was in force for 29 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
- Jul 1, 2012, 5:01 PM CDT (22:01 UTC)
- Expired
- Jul 1, 2012, 5:30 PM CDT
- In force
- 29 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
County Atascosa County, TX
The radar
The Austin/San Antonio radar (KEWX), 115 km from the middle of the area, began a volume at 22:01 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 nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 10.0 hours before the alert went out and 148 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
- 301 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 906 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
432
WUUS54 KEWX 012201
SVREWX
TXC013-012230-
/O.NEW.KEWX.SV.W.0099.120701T2201Z-120701T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
501 PM CDT SUN JUL 1 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN ATASCOSA COUNTY...
* UNTIL 530 PM CDT.
* AT 500 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED 10 MILES SOUTH OF CAMPBELLTON...OR 7
MILES NORTH OF CHOKE CANYON...AND MOVING NORTH AT 35 MPH.
* SOME LOCATIONS IN THE WARNING INCLUDE CHRISTINE AND SMITHSON
VALLEY.
LAT...LON 2863 9835 2864 9846 2888 9865 2895 9826
2874 9815 2862 9832 2862 9834
TIME...MOT...LOC 2200Z 164DEG 21KT 2860 9828
$$1 follow-up statement
967
WWUS54 KEWX 012214
SVSEWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
514 PM CDT SUN JUL 1 2012
TXC013-012230-
/O.CON.KEWX.SV.W.0099.000000T0000Z-120701T2230Z/
ATASCOSA TX-
514 PM CDT SUN JUL 1 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SOUTHEASTERN ATASCOSA COUNTY...
AT 511 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
THIS STORM WAS LOCATED 6 MILES SOUTH OF CAMPBELLTON...MOVING NORTH
AT 35 MPH.
SOME LOCATIONS IN THE WARNING AREA INCLUDE PEGGY...MCCOY...CHRISTINE
AND SMITHSON VALLEY.
LAT...LON 2863 9835 2864 9846 2888 9865 2895 9826
2874 9815 2862 9832 2862 9834
TIME...MOT...LOC 2214Z 164DEG 21KT 2868 9831
$$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.