Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS Austin/San Antonio, TX

January 24, 2012Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 24, 2012, 10:38 PM CST for Val Verde County, Texas. It was in force for 26 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: Jan 24, 2012, 10:38 PM CST (04:38 UTC)
Expired: Jan 24, 2012, 11:04 PM CST
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), 117 km from the middle of the area, began a volume at 04:40 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

Del Rio, TX (KDRT), launched 00:00Z, 4.6 hours before the alert went out and 65 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 619 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 573 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

894 
WUUS54 KEWX 250438
SVREWX
TXC465-250515-
/O.NEW.KEWX.SV.W.0003.120125T0438Z-120125T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1038 PM CST TUE JAN 24 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VAL VERDE COUNTY...

* UNTIL 1115 PM CST.

* AT 1030 PM CST...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF
  BALL SIZE.  THIS STORM WAS LOCATED 6 MILES WEST OF SEMINOLE CANYON
  STATE PARK...OR 13 MILES SOUTHEAST OF LANGTRY...AND MOVING
  NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE SHUMLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2988 10137 2972 10116 2963 10131 2965 10133
      2964 10135 2965 10137 2973 10141 2974 10145
      2977 10147 2976 10151
TIME...MOT...LOC 0438Z 213DEG 26KT 2972 10139

$$

1 follow-up statement

421 
WWUS54 KEWX 250504
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1104 PM CST TUE JAN 24 2012

TXC465-250514-
/O.CAN.KEWX.SV.W.0003.000000T0000Z-120125T0515Z/
VAL VERDE TX-
1104 PM CST TUE JAN 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR VAL VERDE COUNTY IS
CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTH CENTRAL TEXAS.

LAT...LON 2988 10137 2972 10116 2963 10131 2965 10133
      2964 10135 2965 10137 2973 10141 2974 10145
      2977 10147 2976 10151
TIME...MOT...LOC 0504Z 213DEG 26KT 2988 10127

$$

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 24, 10:40 PM CST	Severe Thunderstorm Warning	EWX	Val Verde	35 min
Jan 24, 10:52 PM CST	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	38 min
Jan 24, 11:17 PM CST	Severe Thunderstorm Warning	EWX	Edwards	28 min
Jan 24, 11:29 PM CST	Tornado Warning	EWX	Edwards	16 min
Jan 24, 11:41 PM CST	Severe Thunderstorm Warning	EWX	Edwards	35 min
Jan 24, 11:44 PM CST	Severe Thunderstorm Warning	EWX	Edwards	32 min
Jan 25, 12:20 AM CST	Severe Thunderstorm Warning	EWX	Edwards, Real	40 min
Jan 25, 1:17 AM CST	Areal Flood Advisory	EWX	Bexar	103 min
Jan 25, 1:33 AM CST	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe, Hays	42 min
Jan 25, 2:00 AM CST	Flash Flood Warning	EWX	Bexar	6 hr
Jan 25, 2:06 AM CST	Areal Flood Advisory	EWX	Caldwell, Comal, Guadalupe, Hays	114 min
Jan 25, 2:15 AM CST	Areal Flood Advisory	EWX	Hays, Travis	105 min
Jan 25, 2:47 AM CST	Flash Flood Warning	EWX	Travis	3 hr
Jan 25, 3:33 AM CST	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Travis	42 min
Jan 25, 4:06 AM CST	Areal Flood Advisory	EWX	Bexar, Blanco, Comal, Hays, Kendall	114 min
Jan 25, 4:09 AM CST	Areal Flood Advisory	EWX	Bastrop, Caldwell	111 min
Jan 25, 4:26 AM CST	Flash Flood Warning	EWX	Bastrop	3 hr
Jan 25, 4:26 AM CST	Flash Flood Warning	EWX	Travis, Williamson	3 hr
Jan 25, 4:54 AM CST	Areal Flood Advisory	EWX	Comal, Guadalupe, Hays	2 hr
Jan 25, 5:18 AM CST	Flash Flood Warning	EWX	Bastrop, Caldwell, Hays, Travis	3 hr
Jan 25, 5:49 AM CST	Areal Flood Advisory	EWX	Guadalupe	101 min
Jan 25, 5:54 AM CST	Areal Flood Advisory	EWX	Bastrop, Caldwell	2 hr
Jan 25, 6:07 AM CST	Flash Flood Warning	EWX	Lee	3 hr
Jan 25, 6:23 AM CST	Severe Thunderstorm Warning	EWX	Lee	52 min
Jan 25, 6:26 AM CST	River Flood Warning	EWX	Travis	14 hr
Jan 25, 6:39 AM CST	River Flood Warning	EWX	Bexar	14 hr
Jan 25, 6:46 AM CST	Flash Flood Warning	EWX	Bastrop	3 hr
Jan 25, 6:56 AM CST	River Flood Warning	EWX	Bexar, Wilson	32 hr
Jan 25, 7:04 AM CST	Flash Flood Warning	EWX	Fayette	3 hr
Jan 25, 9:05 AM CST	River Flood Warning	EWX	Caldwell, Gonzales	34 hr
Jan 25, 9:05 AM CST	River Flood Warning	EWX	Gonzales	60 hr
Jan 25, 9:27 AM CST	Flash Flood Warning	EWX	Bastrop	2 hr
Jan 25, 5:49 PM CST	Areal Flood Advisory	EWX	Bastrop	101 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every 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.