Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 60, NWS Tulsa, OK

April 26, 2011LeFlore County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 26, 2011, 6:32 PM CDT for LeFlore County, Oklahoma. It was in force for 18 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 26, 2011, 6:32 PM CDT (23:32 UTC)
Expired: Apr 26, 2011, 6:50 PM CDT
In force: 18 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 82 km from the middle of the area, began a volume at 23:33 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.

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 26, 5:08 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 11.5 hours before the alert went out and 246 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: 1650 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 566 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.2

Open this sounding in Storm Lab

The text

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

898 
WFUS54 KTSA 262332
TORTSA
OKC079-270015-
/O.NEW.KTSA.TO.W.0060.110426T2332Z-110427T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
632 PM CDT TUE APR 26 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 715 PM CDT

* AT 629 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 3 MILES SOUTHWEST OF OCTAVIA...MOVING NORTHEAST
  AT 40 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...OCTAVIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

&&

LAT...LON 3454 9484 3474 9445 3464 9444 3462 9445
      3451 9445 3450 9446 3451 9478
TIME...MOT...LOC 2332Z 246DEG 33KT 3452 9472

$$

2 follow-up statements

342 
WWUS54 KTSA 262346
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
646 PM CDT TUE APR 26 2011

OKC079-270015-
/O.CON.KTSA.TO.W.0060.000000T0000Z-110427T0015Z/
LE FLORE OK-
646 PM CDT TUE APR 26 2011

...TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
SOUTHEASTERN LE FLORE COUNTY...

AT 643 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED OVER SOUTHERN LE
FLORE COUNTY...MOVING NORTHEAST AT 40 MPH.

THE WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

&&

LAT...LON 3451 9463 3453 9468 3474 9445 3464 9444
      3462 9445 3451 9445 3450 9446
TIME...MOT...LOC 2346Z 246DEG 33KT 3454 9459

$$

681 
WWUS54 KTSA 262350 RRA
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
650 PM CDT TUE APR 26 2011

OKC079-270001-
/O.CAN.KTSA.TO.W.0060.000000T0000Z-110427T0015Z/
LE FLORE OK-
650 PM CDT TUE APR 26 2011

...THE TORNADO WARNING FOR SOUTHEASTERN LE FLORE COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
TORNADO WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 3451 9463 3453 9468 3474 9445 3464 9444
      3462 9445 3451 9445 3450 9446
TIME...MOT...LOC 2351Z 246DEG 33KT 3456 9454

$$

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 25, 8:06 PM CDT	River Flood Warning	TSA	Cherokee	12 hr
Apr 25, 8:15 PM CDT	Areal Flood Warning	TSA	Haskell, Latimer, McIntosh, Muskogee, Pittsburg, Sequoyah	10 hr
Apr 26, 5:44 AM CDT	Areal Flood Warning	TSA	Haskell, Latimer, McIntosh, Muskogee, Pittsburg, Sequoyah	6 hr
Apr 26, 11:58 AM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Craig, Delaware, Haskell, Latimer and 10 more	12 hr
Apr 26, 3:55 PM CDT	Special Weather Statement	TSA	LeFlore	35 min
Apr 26, 4:19 PM CDT	Special Weather Statement	TSA	Pittsburg	41 min
Apr 26, 4:25 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	50 min
Apr 26, 4:32 PM CDT	Special Weather Statement	TSA	Atoka	43 min
Apr 26, 4:38 PM CDT	Special Weather Statement	TSA	Haskell	52 min
Apr 26, 4:45 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	45 min
Apr 26, 4:50 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	40 min
Apr 26, 4:58 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg, Pushmataha	47 min
Apr 26, 5:09 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	66 min
Apr 26, 5:11 PM CDT	Flash Flood Warning	TSA	Adair	4 hr
Apr 26, 5:20 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, Muskogee, Sequoyah	4 hr
Apr 26, 5:21 PM CDT	Special Weather Statement	TSA	Haskell	39 min
Apr 26, 5:24 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pushmataha	66 min
Apr 26, 5:26 PM CDT	Special Weather Statement	TSA	Tulsa	34 min
Apr 26, 5:28 PM CDT	Severe Thunderstorm Warning	TSA	Adair, LeFlore, Sequoyah	47 min
Apr 26, 5:28 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Washington	47 min
Apr 26, 5:29 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	30 min
Apr 26, 5:30 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa	35 min
Apr 26, 5:38 PM CDT	Tornado Warning	TSA	LeFlore, Sequoyah	37 min
Apr 26, 5:43 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	32 min
Apr 26, 6:00 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	30 min
Apr 26, 6:03 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	42 min
Apr 26, 6:06 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	54 min
Apr 26, 6:08 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers	39 min
Apr 26, 6:14 PM CDT	Special Weather Statement	TSA	Washington	31 min
Apr 26, 6:19 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Muskogee	41 min
Apr 26, 6:22 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	38 min
Apr 26, 6:32 PM CDT	Flash Flood Warning	TSA	Cherokee	4 hr
Apr 26, 6:36 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	25 min
Apr 26, 6:52 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	16 min
Apr 26, 6:56 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware	37 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.