Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 65, NWS Shreveport, LA

April 30, 2011Wood County, Texas

NWS Shreveport, LA issued this tornado warning at Apr 30, 2011, 7:03 PM CDT for Wood County, Texas. It was in force for 42 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: Apr 30, 2011, 7:03 PM CDT (00:03 UTC)
Expired: Apr 30, 2011, 7:45 PM CDT
In force: 42 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

County Wood County, TX

The radar

The Shreveport radar (KSHV), 144 km from the middle of the area, began a volume at 00:06 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 30, 7:06 PM CDT	TORNADO	6 Ene Mineola, TX	AN EF0 TORNADO TOUCHED DOWN WEST OF HAINESVILLE. TREES WERE SNAPPED WITH A PATH WIDTH OF 50-75 YARDS WIDE. THE STORM CONTINUED ON AN EAST NORTHEAST TRACK CROSSING FM 49 BEFORE LIFTING JUST WEST OF HAINESVILLE. DAMAGE CONSISTED OF MOSTLY UPROOTED OR SNAPPED TRE

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 30, 5:55 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 0.1 hours before the alert went out and 152 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: 3108 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 891 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 13.1

Open this sounding in Storm Lab

The text

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

585 
WFUS54 KSHV 010003
TORSHV
TXC499-010045-
/O.NEW.KSHV.TO.W.0065.110501T0003Z-110501T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
703 PM CDT SAT APR 30 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  WOOD COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF MINEOLA...

* UNTIL 745 PM CDT

* AT 703 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A 
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO ABOUT 5 MILES   
  WEST OF HAINESVILLE...OR 3 MILES NORTHEAST OF MINEOLA...MOVING     
  NORTHEAST AT 25 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING GOLF 
BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 3292 9529 3292 9515 3261 9516 3262 9549
      3274 9559
TIME...MOT...LOC 0002Z 242DEG 20KT 3272 9542

$$

15

1 follow-up statement

275 
WWUS54 KSHV 010033
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
733 PM CDT SAT APR 30 2011

TXC499-010045-
/O.CON.KSHV.TO.W.0065.000000T0000Z-110501T0045Z/
WOOD TX-
733 PM CDT SAT APR 30 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR WOOD
COUNTY...

AT 733 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS 
LOCATED 2 MILES EAST OF OAK GROVE...OR 13 MILES SOUTH OF 
WINNSBORO...MOVING NORTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PERRYVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER TO GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 3271 9535 3280 9538 3290 9529 3292 9515
      3268 9516
TIME...MOT...LOC 0033Z 245DEG 18KT 3277 9525

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:44 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Upshur, Wood	61 min
Apr 30, 8:26 PM CDT	Tornado Warning	SHV	Camp, Morris, Titus, Upshur	49 min
Apr 30, 9:02 PM CDT	Tornado Warning	SHV	Camp, Cass, Morris, Titus, Upshur	43 min
Apr 30, 9:44 PM CDT	Tornado Warning	SHV	Bowie, Cass	46 min
Apr 30, 10:27 PM CDT	Severe Thunderstorm Warning	SHV	Cass	63 min
May 1, 7:52 AM CDT	Severe Thunderstorm Warning	SHV	Red River	53 min
May 1, 5:43 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Smith, Upshur, Wood	62 min
May 1, 6:19 PM CDT	Tornado Warning	SHV	Gregg, Harrison, Marion, Upshur	41 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.