Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 32, NWS Shreveport, LA

April 11, 2012Rusk County, Texas

NWS Shreveport, LA issued this tornado warning at Apr 11, 2012, 2:50 PM CDT for Rusk County, Texas. It was in force for 40 min. 6 reports 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
Apr 11, 2012, 2:50 PM CDT (19:50 UTC)
Expired
Apr 11, 2012, 3:30 PM CDT
In force
40 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon

County Rusk County, TX

The radar

The Shreveport radar (KSHV), 99 km from the middle of the area, began a volume at 19:54 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
Apr 11, 2:51 PM CDTTORNADO7 Sw Henderson, TXTREES AND A FEW POWER LINES DOWN ON CR 468. EF0 TORNADO
Apr 11, 2:53 PM CDTHAIL 11 W Henderson, TXQUARTER SIZE HAIL FELL ON FM 13 NEAR THE RUSK COUNTY AIRPORT.
Apr 11, 2:55 PM CDTTSTM WND DMG8 Sw Henderson, TXNUMEROUS TREES DOWN AND POWER OUTAGES ALONG CR 468
Apr 11, 3:20 PM CDTHAIL 1Minden, TXQUARTER SIZE HAIL FELL IN MINDEN.
Apr 11, 3:24 PM CDTTORNADO6 Nnw Mount Enterprise, TXTHE EF0 TORNADO FIRST TOUCHED DOWN SOUTH OF FM 1798 ALONG COUNTY ROAD 3146 WHERE A COUPLE TREES WERE SNAPPED AND UPROOTED. THE EF0 TORNADOCONTINUED SOUTHEAST SNAPPING LARGE BRANCHES ON ALONG CR 3146 BEFORE LIFTINGEAST OF CR 3146 AND NORTH OF CR 3145. MAX WIDTH
Apr 11, 3:25 PM CDTTSTM WND DMG7 Nw Mount Enterprise, TXSMALL LIMBS DOWN NEAR MINDEN

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

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 7.8 hours before the alert went out and 108 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, Shreveport, LA at 12:00Z on 2012-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1015 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, Shreveport, LA at 12:00Z on 2012-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
1015 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
833 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

577 
WFUS54 KSHV 111950
TORSHV
TXC401-112030-
/O.NEW.KSHV.TO.W.0032.120411T1950Z-120411T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
250 PM CDT WED APR 11 2012

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN RUSK COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF HENDERSON...

* UNTIL 330 PM CDT

* AT 248 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES
  SOUTHWEST OF HENDERSON...MOVING SOUTHEAST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MINDEN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING 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.

&&

LAT...LON 3201 9460 3185 9486 3211 9498 3219 9480
TIME...MOT...LOC 1950Z 317DEG 10KT 3207 9490

$$

06
2 follow-up statements
324 
WWUS54 KSHV 112009
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
309 PM CDT WED APR 11 2012

TXC401-112030-
/O.CON.KSHV.TO.W.0032.000000T0000Z-120411T2030Z/
RUSK TX-
309 PM CDT WED APR 11 2012

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

AT 304 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE 
METEOROLOGISTS CONTINUED TO DETECT A THUNDERSTORM CAPABLE OF 
PRODUCING A TORNADO.  THIS THUNDERSTORM WAS LOCATED NEAR 
BRACHFIELD...OR 9 MILES SOUTHWEST OF HENDERSON...MOVING SOUTHEAST AT 
10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MINDEN
AND LANEVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3204 9465 3193 9487 3208 9495 3214 9479
TIME...MOT...LOC 2008Z 324DEG 8KT 3204 9486

$$

06
860 
WWUS54 KSHV 112031
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
331 PM CDT WED APR 11 2012

TXC401-112038-
/O.EXP.KSHV.TO.W.0032.000000T0000Z-120411T2030Z/
RUSK TX-
331 PM CDT WED APR 11 2012

...THE TORNADO WARNING FOR RUSK COUNTY WILL EXPIRE AT 330 PM CDT...

THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO WEST
OF BRANCHFIELD HAS DECREASED IN INTENSITY.

LAT...LON 3204 9465 3193 9487 3208 9495 3214 9479
TIME...MOT...LOC 2028Z 324DEG 8KT 3200 9483

$$

06

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 8:17 PM CDTSevere Thunderstorm WarningSHVBowie43 min
Apr 10, 9:40 PM CDTSevere Thunderstorm WarningSHVBowie35 min
Apr 11, 3:22 PM CDTTornado WarningSHVRusk31 min
Apr 11, 4:01 PM CDTTornado WarningSHVSabine, San Augustine44 min
Apr 11, 4:06 PM CDTTornado WarningSHVNacogdoches, Shelby39 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.