Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 24, NWS San Angelo, TX

May 30, 2012Mason County, Texas

NWS San Angelo, TX issued this tornado warning at May 30, 2012, 9:22 PM CDT for Mason County, Texas. It was in force for 23 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 30, 2012, 9:22 PM CDT (02:22 UTC)
Expired
May 30, 2012, 9:45 PM CDT
In force
23 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon

County Mason County, TX

The radar

The San Angelo radar (KSJT), 130 km from the middle of the area, began a volume at 02:24 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.

What was reported inside it

TimeReportWhereRemark
May 30, 9:43 PM CDTHAIL 1.54 Sw Mason, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 30, 5:11 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 2.4 hours before the alert went out and 207 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, Del Rio, TX at 00:00Z on 2012-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2015 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, Del Rio, TX at 00:00Z on 2012-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
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

Open this sounding in Storm Lab

The text

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

089 
WFUS54 KSJT 310222
TORSJT
TXC319-310245-
/O.NEW.KSJT.TO.W.0024.120531T0222Z-120531T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
922 PM CDT WED MAY 30 2012

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MASON COUNTY IN WEST CENTRAL TEXAS...

* UNTIL 945 PM CDT

* AT 917 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS 6 MILES NORTHWEST OF STREETER...OR 13 MILES 
NORTHWEST   OF MASON...MOVING SOUTH SOUTHEAST AT 15 MPH. THIS STORM 
MAY PRODUCE A TORNADO AT ANY TIME. RESIDENTS IN THE PATH OF THIS 
STORM ARE URGED TO TAKE SHELTER IMMEDIATELY! 

  IN ADDITION TO DANGEROUS TORNADIC WINDS...OTHER HAZARDS INCLUDE...
  LARGE DAMAGING HAIL UP TO TENNIS BALL SIZE.
  DAMAGING STRAIGHT LINE WINDS IN EXCESS OF 60 MPH.
  POTENTIALLY DEADLY LIGHTNING.

* THE TORNADO IS EXPECTED TO BE NEAR...
  STREETER BY 940 PM CDT...
  MASON BY 945 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY MORNING
FOR WEST CENTRAL TEXAS.

&&

LAT...LON 3054 9935 3076 9949 3086 9948 3092 9940
      3070 9905
TIME...MOT...LOC 0222Z 309DEG 12KT 3083 9941

$$
DANIELS

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 30, 7:12 PM CDTTornado WarningSJTConcho, McCulloch33 min
May 30, 7:40 PM CDTSevere Thunderstorm WarningSJTColeman, Concho, McCulloch, Menard50 min
May 30, 7:43 PM CDTTornado WarningSJTConcho, McCulloch32 min
May 30, 8:12 PM CDTTornado WarningSJTConcho, McCulloch, Menard33 min
May 30, 8:20 PM CDTSevere Thunderstorm WarningSJTThrockmorton40 min
May 30, 8:26 PM CDTSevere Thunderstorm WarningSJTHaskell49 min
May 30, 8:28 PM CDTSevere Thunderstorm WarningSJTConcho, McCulloch, Mason, Menard47 min
May 30, 8:44 PM CDTTornado WarningSJTMcCulloch, Mason, Menard31 min
May 30, 8:54 PM CDTSevere Thunderstorm WarningSJTThrockmorton36 min
May 30, 9:03 PM CDTSevere Thunderstorm WarningSJTHaskell42 min
May 30, 9:11 PM CDTSevere Thunderstorm WarningSJTKimble, McCulloch, Mason, Menard49 min
May 30, 9:29 PM CDTSevere Thunderstorm WarningSJTHaskell, Shackelford, Throckmorton46 min
May 30, 9:56 PM CDTSevere Thunderstorm WarningSJTHaskell, Shackelford, Throckmorton37 min
May 30, 9:56 PM CDTSevere Thunderstorm WarningSJTMason49 min
May 30, 10:43 PM CDTSevere Thunderstorm WarningSJTMason17 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.