Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 5, NWS Tulsa, OK

February 27, 2011Choctaw County, Pushmataha County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 27, 2011, 10:53 PM CST for Choctaw County, Pushmataha County, Oklahoma. It was in force for 52 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: Feb 27, 2011, 10:53 PM CST (04:53 UTC)
Expired: Feb 27, 2011, 11:45 PM CST
In force: 52 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Choctaw County, OK, Pushmataha County, OK

The radar

The Western Arkansas radar (KSRX), 170 km from the middle of the area, began a volume at 04:54 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 27, 10:04 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.9 hours before the alert went out and 219 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: 765 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 1244 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 242 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

286 
WUUS54 KTSA 280453
SVRTSA
OKC023-127-280545-
/O.NEW.KTSA.SV.W.0005.110228T0453Z-110228T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1053 PM CST SUN FEB 27 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHOCTAW COUNTY IN SOUTHEAST OKLAHOMA
  SOUTHERN PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1145 PM CST

* AT 1048 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 3 MILES SOUTH OF DUNBAR TO 21 MILES SOUTHWEST OF
  BOSWELL...MOVING EAST AT 55 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...
  DAMAGING WIND GUSTS TO 70 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  ANTLERS...BOSWELL...CLOUDY...DUNBAR...FORT TOWSON...GOODLAND...
  HUGO...KELLOND...KENT...KOSOMA...MESSER...MOYERS...NASHOBA...
  OLETA...RATTAN...SAWYER...SNOW AND SOPER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM
WINDOWS.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3389 9552 3388 9554 3394 9558 3389 9569
      3387 9582 3394 9594 3400 9595 3449 9554
      3449 9504 3449 9503 3425 9503 3424 9513
      3394 9515 3396 9523 3389 9526 3389 9532
      3386 9534 3386 9546
TIME...MOT...LOC 0453Z 270DEG 46KT 3442 9550 3379 9601

$$

1 follow-up statement

944 
WWUS54 KTSA 280509
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1109 PM CST SUN FEB 27 2011

OKC023-127-280545-
/O.CON.KTSA.SV.W.0005.000000T0000Z-110228T0545Z/
CHOCTAW OK-PUSHMATAHA OK-
1109 PM CST SUN FEB 27 2011

...SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 1145 PM CST FOR
CENTRAL PUSHMATAHA AND CHOCTAW COUNTIES...

AT 1105 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM SNOW TO 16 MILES SOUTHWEST OF GAY...MOVING EAST AT 55
MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
DAMAGING WIND GUSTS TO 70 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...GAY...
RATTAN...GOODLAND...MESSER...NASHOBA...HUGO...APPLE...CLOUDY...
GRANT...OLETA...ORD...FALLON...CORINNE...SAWYER...SOBOL...FORT
TOWSON...FROGVILLE...HUSKEY AND SWINK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3389 9552 3388 9554 3394 9558 3389 9569
      3387 9582 3449 9542 3449 9503 3425 9503
      3424 9513 3394 9515 3396 9523 3389 9526
      3389 9532 3386 9534 3386 9546
TIME...MOT...LOC 0509Z 270DEG 46KT 3445 9533 3379 9576

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 6:07 PM CST	Tornado Warning	TSA	Osage	23 min
Feb 27, 6:23 PM CST	Tornado Warning	TSA	Osage	12 min
Feb 27, 8:03 PM CST	Special Weather Statement	TSA	Osage	42 min
Feb 27, 9:00 PM CST	Special Weather Statement	TSA	Nowata	30 min
Feb 27, 9:48 PM CST	Special Weather Statement	TSA	Haskell, Latimer, Pittsburg	27 min
Feb 27, 9:54 PM CST	Special Weather Statement	TSA	Muskogee	36 min
Feb 27, 9:56 PM CST	Special Weather Statement	TSA	Adair	34 min
Feb 27, 10:23 PM CST	Special Weather Statement	TSA	Cherokee	37 min
Feb 27, 10:26 PM CST	Special Weather Statement	TSA	Haskell	34 min
Feb 27, 10:35 PM CST	Special Weather Statement	TSA	Pushmataha	25 min
Feb 27, 10:39 PM CST	Severe Thunderstorm Warning	TSA	Adair	51 min
Feb 27, 10:47 PM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee	28 min
Feb 27, 10:48 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Sequoyah	42 min
Feb 27, 10:50 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Muskogee, Sequoyah	40 min
Feb 27, 11:00 PM CST	Severe Thunderstorm Warning	TSA	Adair	30 min
Feb 27, 11:27 PM CST	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	48 min
Feb 27, 11:38 PM CST	Severe Thunderstorm Warning	TSA	LeFlore, Pushmataha	52 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011 Every severe thunderstorm warning 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.