Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 83, NWS Austin/San Antonio, TX

May 10, 2012Karnes County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 10, 2012, 2:24 PM CDT for Karnes County, Texas. It was in force for 51 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 10, 2012, 2:24 PM CDT (19:24 UTC)
Expired
May 10, 2012, 3:15 PM CDT
In force
51 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

County Karnes County, TX

The radar

The Austin/San Antonio radar (KEWX), 106 km from the middle of the area, began a volume at 19:23 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.

IssuedProductOfficeLasted
May 10, 11:40 AM CDTTornado WatchSPC8 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 7.4 hours before the alert went out and 126 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-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 2012-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1593 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2012-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1593 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
779 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

073 
WUUS54 KEWX 101924
SVREWX
TXC255-102015-
/O.NEW.KEWX.SV.W.0083.120510T1924Z-120510T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
224 PM CDT THU MAY 10 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL KARNES COUNTY...

* UNTIL 315 PM CDT.

* AT 219 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 14
  MILES SOUTHWEST OF KENEDY...AND MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE KARNES CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2871 9791 2869 9801 2878 9810 2912 9783
      2874 9766 2867 9776 2867 9787
TIME...MOT...LOC 1924Z 240DEG 25KT 2874 9802

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 5:21 AM CDTSevere Thunderstorm WarningEWXVal Verde54 min
May 10, 6:12 AM CDTSevere Thunderstorm WarningEWXVal Verde63 min
May 10, 7:19 AM CDTSevere Thunderstorm WarningEWXEdwards, Val Verde44 min
May 10, 9:29 AM CDTSevere Thunderstorm WarningEWXDimmit, Frio, Zavala61 min
May 10, 10:30 AM CDTSevere Thunderstorm WarningEWXFrio60 min
May 10, 10:33 AM CDTAreal Flood AdvisoryEWXFrio117 min
May 10, 11:17 AM CDTSevere Thunderstorm WarningEWXAtascosa, Frio58 min
May 10, 11:32 AM CDTSevere Thunderstorm WarningEWXAtascosa, Wilson58 min
May 10, 12:02 PM CDTFlash Flood WarningEWXVal Verde3 hr
May 10, 12:14 PM CDTSevere Thunderstorm WarningEWXAtascosa, Frio31 min
May 10, 12:20 PM CDTAreal Flood AdvisoryEWXAtascosa, Frio2 hr
May 10, 12:40 PM CDTAreal Flood AdvisoryEWXBandera, Edwards, Kerr, Kinney, Real, Uvalde110 min
May 10, 1:04 PM CDTSevere Thunderstorm WarningEWXKarnes, Wilson56 min
May 10, 1:15 PM CDTTornado WarningEWXGonzales, Karnes, Wilson45 min
May 10, 1:42 PM CDTTornado WarningEWXAtascosa33 min
May 10, 1:57 PM CDTTornado WarningEWXDeWitt, Gonzales, Karnes, Wilson33 min
May 10, 2:19 PM CDTFlash Flood WarningEWXAtascosa, DeWitt, Gonzales, Karnes, Wilson3 hr
May 10, 2:42 PM CDTTornado WarningEWXKarnes48 min
May 10, 2:49 PM CDTFlash Flood WarningEWXBandera, Edwards, Kerr, Real, Uvalde3 hr
May 10, 3:05 PM CDTTornado WarningEWXWilson40 min
May 10, 3:31 PM CDTTornado WarningEWXKarnes29 min
May 10, 3:40 PM CDTRiver Flood WarningEWXVal Verde31 hr
May 10, 3:45 PM CDTAreal Flood AdvisoryEWXDeWitt, Fayette, Gonzales, Lavaca105 min
May 10, 3:57 PM CDTTornado WarningEWXDeWitt, Karnes, Wilson33 min
May 10, 4:39 PM CDTFlash Flood WarningEWXBandera, Gillespie, Kerr81 min
May 10, 4:52 PM CDTSevere Thunderstorm WarningEWXDeWitt, Gonzales, Karnes29 min
May 10, 5:58 PM CDTFlash Flood WarningEWXBandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 4 more3 hr
May 10, 5:58 PM CDTSevere Thunderstorm WarningEWXDimmit, Maverick, Uvalde, Zavala47 min
May 10, 6:11 PM CDTAreal Flood AdvisoryEWXDeWitt, Fayette, Karnes, Lavaca109 min
May 10, 6:41 PM CDTSevere Thunderstorm WarningEWXDimmit, Frio, Zavala49 min

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.