Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 33, NWS Shreveport, LA

April 25, 2011Angelina County, Nacogdoches County, Texas

NWS Shreveport, LA issued this tornado warning at Apr 25, 2011, 10:03 PM CDT for Angelina County, Nacogdoches County, Texas. It was in force for 42 min. 4 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 25, 2011, 10:03 PM CDT (03:03 UTC)
Expired: Apr 25, 2011, 10:45 PM CDT
In force: 42 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Angelina County, TX, Nacogdoches County, TX

The radar

The Shreveport radar (KSHV), 157 km from the middle of the area, began a volume at 03:03 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

Time	Report	Where	Remark
Apr 25, 10:13 PM CDT	TORNADO	Lufkin, TX	AN EF0 TORNADO WITH A PATH LENGTH OF 1 MILE TOUCHED DOWN ALONG RICHARDSON ROAD NORTHWEST OF LUFKIN. MINOR ROOF DAMAGE OCCURRED TO A MOBILE HOME AT ROYCE OLIVER ROAD AND RICHARDSON ROAD. ANOTHER HOME SUFFERED MINOR ROOF DAMAGE AT THE FM 706/HWY 69 INTERSECTION.
Apr 25, 10:27 PM CDT	TSTM WND DMG	Lufkin, TX	NUMEROUS TREES DOWN THROUGHOUT THE COUNTY INCLUDING 94 WEST...103 WEST...FM 1819 AND CHOPIN ROAD.
Apr 25, 10:40 PM CDT	TSTM WND DMG	Huntington, TX	NWS STORM SURVEY NOTED A FEW TREES AND NUMEROUS TREE LIMBS WERE BLOWN DOWN ALONG HWY. 69 FROM SOUTH OF HUNTINGTON TO THE JASPER COUNTY LINE. WINDS WERE ESTIMATED AT 60-70 MPH.
Apr 25, 10:50 PM CDT	HAIL 1.75	Zavalla, 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.

Issued	Product	Office	Lasted
Apr 25, 2:41 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 3.1 hours before the alert went out and 164 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: 782 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 262 m²/s²
0-3 km storm-relative helicity: 553 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 15.0

Open this sounding in Storm Lab

The text

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

157 
WFUS54 KSHV 260303
TORSHV
TXC005-347-260345-
/O.NEW.KSHV.TO.W.0033.110426T0303Z-110426T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1003 PM CDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL ANGELINA COUNTY IN EASTERN TEXAS...
  THIS INCLUDES THE CITIES OF...LUFKIN...DIBOLL...
  SOUTHEASTERN NACOGDOCHES COUNTY IN EASTERN TEXAS...

* UNTIL 1045 PM CDT

* AT 959 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 15 MILES WEST OF
  DIBOLL...MOVING EAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HUDSON...HUNTINGTON AND ETOILE...

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 3113 9482 3114 9484 3117 9483 3124 9487
      3125 9490 3129 9489 3133 9491 3134 9494
      3150 9432 3127 9433 3127 9434 3111 9434
TIME...MOT...LOC 0303Z 274DEG 46KT 3122 9497

$$

ELEVEN

1 follow-up statement

114 
WWUS54 KSHV 260325
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1025 PM CDT MON APR 25 2011

TXC005-347-260345-
/O.CON.KSHV.TO.W.0033.000000T0000Z-110426T0345Z/
NACOGDOCHES TX-ANGELINA TX-
1025 PM CDT MON APR 25 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR ANGELINA
AND NACOGDOCHES COUNTIES...

AT 1025 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS
LOCATED NEAR BURKE...OR NEAR DIBOLL...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HOMER...HUNTINGTON...SHAWNEE...ETOILE AND ZAVALLA

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 3114 9477 3117 9478 3124 9480 3131 9479
      3144 9432 3127 9433 3127 9434 3111 9434
TIME...MOT...LOC 0325Z 272DEG 44KT 3122 9467

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 7:01 PM CDT	Tornado Warning	SHV	Bowie	44 min
Apr 25, 7:11 PM CDT	Flash Flood Warning	SHV	Bowie, Camp, Cass, Franklin, Morris, Red River and 1 more	3 hr
Apr 25, 7:45 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Harrison, Marion, Morris and 1 more	60 min
Apr 25, 7:56 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Smith	64 min
Apr 25, 7:58 PM CDT	Tornado Warning	SHV	Cass, Marion, Morris	39 min
Apr 25, 8:06 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Marion, Upshur	54 min
Apr 25, 8:45 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Gregg, Harrison, Marion	60 min
Apr 25, 8:57 PM CDT	Severe Thunderstorm Warning	SHV	Panola, Rusk	48 min
Apr 25, 9:25 PM CDT	Tornado Warning	SHV	Angelina, Cherokee, Nacogdoches	50 min
Apr 25, 10:11 PM CDT	Tornado Warning	SHV	Angelina, Nacogdoches	49 min
Apr 25, 10:45 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Sabine, San Augustine	45 min
Apr 25, 10:48 PM CDT	Tornado Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine	27 min
Apr 26, 4:03 AM CDT	Lake Wind Advisory	SHV	Angelina, Cherokee, Gregg, Harrison, Marion, Nacogdoches and 8 more	27 hr
Apr 26, 9:42 AM CDT	River Flood Warning	SHV	Franklin, Morris, Red River, Titus	67 hr
Apr 26, 9:42 AM CDT	River Flood Warning	SHV	Bowie, Cass, Morris	15 days
Apr 26, 9:43 AM CDT	River Flood Warning	SHV	Franklin, Morris, Titus	47 hr
Apr 26, 4:36 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	54 min
Apr 26, 5:17 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Rusk	58 min
Apr 26, 5:29 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	61 min
Apr 26, 5:50 PM CDT	Tornado Warning	SHV	Smith	40 min
Apr 26, 6:11 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Rusk	64 min
Apr 26, 6:24 PM CDT	Tornado Warning	SHV	Smith, Upshur, Wood	51 min
Apr 26, 6:34 PM CDT	Tornado Warning	SHV	Gregg, Harrison, Panola, Rusk	41 min
Apr 26, 6:55 PM CDT	Severe Thunderstorm Warning	SHV	Red River	65 min

Nearby

Tornado Warnings in Texas, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.