Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 19, NWS Austin/San Antonio, TX

May 10, 2012Karnes County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at May 10, 2012, 2:42 PM CDT for Karnes County, Texas. It was in force for 48 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, 2:42 PM CDT (19:42 UTC)
Expired
May 10, 2012, 3:30 PM CDT
In force
48 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

County Karnes County, TX

The radar

The Austin/San Antonio radar (KEWX), 104 km from the middle of the area, began a volume at 19:42 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, 7.7 hours before the alert went out and 130 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°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.

914 
WFUS54 KEWX 101942
TOREWX
TXC255-102030-
/O.NEW.KEWX.TO.W.0019.120510T1942Z-120510T2030Z/

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN KARNES COUNTY...

* UNTIL 330 PM CDT.

* AT 237 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 13 MILES SOUTHWEST OF
  KENEDY...MOVING NORTHEAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE KARNES CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER
YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER
PROTECTION.

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

&&

LAT...LON 2878 9810 2901 9793 2883 9771 2868 9788
      2871 9791 2869 9796 2869 9801
TIME...MOT...LOC 1942Z 221DEG 17KT 2875 9802

$$
2 follow-up statements
384 
WWUS54 KEWX 102001
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
301 PM CDT THU MAY 10 2012

TXC255-102030-
/O.CON.KEWX.TO.W.0019.000000T0000Z-120510T2030Z/
KARNES TX-
301 PM CDT THU MAY 10 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR SOUTHERN
KARNES COUNTY...

AT 300 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A TORNADO. 
THIS TORNADO WAS LOCATED NEAR COY CITY...OR 9 MILES SOUTHWEST OF
KARNES CITY...MOVING NORTHEAST AT 15 MPH.

SOME LOCATIONS IN THE WARNING AREA INCLUDE KENEDY AND PANA MARIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER
YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER
PROTECTION.

&&

LAT...LON 2878 9810 2901 9793 2883 9771 2868 9788
      2871 9791 2869 9796 2869 9801
TIME...MOT...LOC 2001Z 217DEG 13KT 2880 9800

$$
550 
WWUS54 KEWX 102020
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
320 PM CDT THU MAY 10 2012

TXC255-102030-
/O.CON.KEWX.TO.W.0019.000000T0000Z-120510T2030Z/
KARNES TX-
320 PM CDT THU MAY 10 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR SOUTHERN
KARNES COUNTY...

AT 314 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A TORNADO. 
THIS TORNADO WAS LOCATED NEAR COY CITY...OR NEAR KARNES CITY...MOVING
NORTHEAST AT 15 MPH. THIS STORM WILL MOVE NORTHEAST ALONG FM 99 
ACROSS KARNES CITY TO ACROSS HIGHWAYS 80 AND 123.

SOME LOCATIONS IN THE WARNING AREA INCLUDE KENEDY AND PANA MARIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER
YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER
PROTECTION.

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

&&

LAT...LON 2878 9810 2901 9793 2883 9771 2868 9788
      2871 9791 2869 9796 2869 9801
TIME...MOT...LOC 2019Z 217DEG 13KT 2886 9796

$$

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, 2:24 PM CDTSevere Thunderstorm WarningEWXKarnes51 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

Tornado Warnings in Texas, 2012Every tornado warning in 2012Tornadoes 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.