Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 10, NWS Shreveport, LA

April 14, 2011McCurtain County, Oklahoma

NWS Shreveport, LA issued this tornado warning at Apr 14, 2011, 10:48 PM CDT for McCurtain County, Oklahoma. It was in force for 57 min. 3 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 14, 2011, 10:48 PM CDT (03:48 UTC)
Expired: Apr 14, 2011, 11:45 PM CDT
In force: 57 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

County McCurtain County, OK

The radar

The Western Arkansas radar (KSRX), 136 km from the middle of the area, began a volume at 03:49 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 14, 10:52 PM CDT	TORNADO	6 Se Ringold, OK	NUMEROUS TREES WERE UPROOTED AND/OR SNAPPED. ONE BARN WAS DESTROYED AND ONE HOME HAD MINOR ROOF DAMAGE. TORNADO WAS CLASSIFIED AS EF0 WITH A PATH WIDTH OF 75 YARDS AND A PATH LENGTH OF 4.52 MILES.
Apr 14, 11:02 PM CDT	TORNADO	6 Se Ringold, OK	NUMEROUS TREES WERE UPROOTED AND/OR SNAPPED. ONE BARN WAS DESTROYED AND ONE HOME HAD MINOR ROOF DAMAGE. TORNADO WAS CLASSIFIED AS EF0 WITH A PATH WIDTH OF 75 YARDS AND A PATH LENGTH OF 4.52 MILES.
Apr 14, 11:37 PM CDT	TORNADO	4 Wsw Hochatown, OK	AN EF0 TORNADO TOUCHED DOWN WEST OF HOCHATOWN. THE STORM FIRST TOUCHED DOWN ALONG MEADOW LAKE DRIVE IN BEAVER BEND STATE PARK. SEVERAL TREES WERE UPROOTED. THE TORNADO THEN CROSSED COYOTE DRIVE AGAIN UPROOTING TREES. THE TORNADO FINALLY LIFTED ALONG THE SHOREL

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 14, 9:06 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 3.8 hours before the alert went out and 222 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: 1201 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1314 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

216 
WFUS54 KSHV 150348
TORSHV
OKC089-150445-
/O.NEW.KSHV.TO.W.0010.110415T0348Z-110415T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1048 PM CDT THU APR 14 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MCCURTAIN COUNTY IN SOUTHEAST OKLAHOMA...

* UNTIL 1145 PM CDT

* AT 1046 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A      
  TORNADO WAS AROUND 30 MILES WEST OF BROKEN BOW...MOVING EAST AT    
  30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  RUFE...RINGOLD...SLIM...WRIGHT CITY...GLOVER...OAK HILL...MOUNT
  HERMAN AND SHERWOOD.

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 3401 9472 3407 9516 3416 9517 3417 9515
      3425 9515 3426 9514 3425 9505 3430 9504
      3436 9470
TIME...MOT...LOC 0347Z 262DEG 25KT 3417 9520

$$

06

1 follow-up statement

882 
WWUS54 KSHV 150410
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1110 PM CDT THU APR 14 2011

OKC089-150445-
/O.CON.KSHV.TO.W.0010.000000T0000Z-110415T0445Z/
MCCURTAIN OK-
1110 PM CDT THU APR 14 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR
MCCURTAIN COUNTY...

AT 1106 PM CDT...WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A
SEVERE THUNDERSTORM WITH STRONG ROTATION.  THIS TORNADO WAS LOCATED 7
MILES NORTH OF WRIGHT CITY...OR 32 MILES EAST OF HUGO...MOVING EAST
AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GLOVER...MOUNT HERMAN...OAK HILL...SHERWOOD AND BROKEN BOW

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.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3405 9503 3425 9501 3436 9470 3401 9472
TIME...MOT...LOC 0409Z 272DEG 29KT 3417 9496

$$

06

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 9:46 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	59 min
Apr 14, 10:30 PM CDT	Tornado Warning	SHV	McCurtain	31 min
Apr 14, 11:34 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	56 min
Apr 14, 11:37 PM CDT	Tornado Warning	SHV	McCurtain	38 min
Apr 15, 12:26 AM CDT	Severe Thunderstorm Warning	SHV	McCurtain	64 min
Apr 15, 10:14 AM CDT	River Flood Warning	SHV	McCurtain	4 hr

Nearby

Tornado Warnings in Oklahoma, 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.