Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 53, NWS Tulsa, OK

April 22, 20114 counties in Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 22, 2011, 8:26 PM CDT for 4 counties in Oklahoma. It was in force for 34 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 22, 2011, 8:26 PM CDT (01:26 UTC)
Expired: Apr 22, 2011, 9:00 PM CDT
In force: 34 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Haskell County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK

The radar

The Western Arkansas radar (KSRX), 77 km from the middle of the area, began a volume at 01:27 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 22, 3:47 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.4 hours before the alert went out and 216 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: 2835 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 4.7
Supercell composite: 18.1

Open this sounding in Storm Lab

The text

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

675 
WFUS54 KTSA 230126
TORTSA
OKC061-091-101-121-230200-
/O.NEW.KTSA.TO.W.0053.110423T0126Z-110423T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
826 PM CDT FRI APR 22 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA
  NORTHERN HASKELL COUNTY IN SOUTHEAST OKLAHOMA
  EASTERN MCINTOSH COUNTY IN SOUTHEAST OKLAHOMA
  NORTHEASTERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 900 PM CDT

* AT 823 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 9 MILES NORTHWEST OF ENTERPRISE...MOVING EAST
  AT 40 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  ENTERPRISE...PORUM...BRIARTOWN...WHITEFIELD...STIGLER AND TAMAHA.

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!

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS...TAKE COVER NOW! IF YOU
WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A
SAFE PLACE!

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

&&

LAT...LON 3540 9496 3517 9499 3524 9557 3542 9555
TIME...MOT...LOC 0126Z 276DEG 34KT 3532 9545

$$

1 follow-up statement

329 
WWUS54 KTSA 230159
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
859 PM CDT FRI APR 22 2011

OKC061-091-101-121-230207-
/O.EXP.KTSA.TO.W.0053.000000T0000Z-110423T0200Z/
MUSKOGEE OK-MCINTOSH OK-HASKELL OK-PITTSBURG OK-
859 PM CDT FRI APR 22 2011

...THE TORNADO WARNING FOR NORTHEASTERN PITTSBURG...NORTHERN
HASKELL...EASTERN MCINTOSH AND SOUTHEASTERN MUSKOGEE COUNTIES EXPIRES
AT 900 PM CDT...

THE TORNADO WARNED THUNDERSTORM HAS WEAKENED BELOW SEVERE 
LIMITS...THEREFORE THE TORNADO WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WARNING DOES REMAIN IN EFFECT UNTIL 9:15 PM 
FOR MUCH OF THIS AREA DUE TO A SECOND STORM THAT IS CURRENTLY 
LOCATED JUST NORTH OF EUFAULA. THIS STORM IS MOVING EAST AT 40 MILES 
AN HOUR.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 3540 9496 3517 9499 3524 9557 3542 9555
TIME...MOT...LOC 0157Z 276DEG 34KT 3529 9509

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 7:06 PM CDT	Tornado Warning	TSA	Cherokee	24 min
Apr 22, 7:07 PM CDT	Tornado Warning	TSA	McIntosh, Okfuskee, Okmulgee	23 min
Apr 22, 7:15 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	45 min
Apr 22, 7:30 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee	45 min
Apr 22, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	50 min
Apr 22, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee	50 min
Apr 22, 7:49 PM CDT	Tornado Warning	TSA	McIntosh, Pittsburg	41 min
Apr 22, 8:10 PM CDT	Areal Flood Advisory	TSA	McIntosh, Okfuskee, Okmulgee	80 min
Apr 22, 8:29 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Okfuskee, Okmulgee, Pittsburg	46 min
Apr 22, 8:35 PM CDT	Special Weather Statement	TSA	Adair	25 min
Apr 22, 9:12 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, McIntosh, Muskogee, Pittsburg, Sequoyah	48 min
Apr 22, 9:26 PM CDT	Tornado Warning	TSA	Haskell, LeFlore	34 min
Apr 22, 10:04 PM CDT	Special Weather Statement	TSA	Pittsburg	41 min
Apr 22, 10:59 PM CDT	Special Weather Statement	TSA	Adair	31 min
Apr 22, 11:43 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg, Pushmataha	62 min
Apr 22, 11:49 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	41 min
Apr 23, 12:30 AM CDT	Special Weather Statement	TSA	LeFlore	45 min
Apr 23, 12:45 AM CDT	Special Weather Statement	TSA	LeFlore	45 min
Apr 23, 1:13 AM CDT	Special Weather Statement	TSA	LeFlore	32 min
Apr 23, 1:16 AM CDT	Special Weather Statement	TSA	McIntosh, Okmulgee	44 min
Apr 23, 1:37 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	23 min
Apr 23, 1:56 AM CDT	Special Weather Statement	TSA	LeFlore	49 min
Apr 23, 2:08 AM CDT	Special Weather Statement	TSA	Latimer	37 min
Apr 23, 2:34 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	56 min
Apr 23, 2:45 AM CDT	Special Weather Statement	TSA	Haskell	60 min
Apr 23, 4:16 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Wagoner	29 min
Apr 23, 4:46 AM CDT	Special Weather Statement	TSA	Mayes	29 min
Apr 23, 4:52 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes	38 min
Apr 23, 5:26 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	34 min
Apr 23, 6:22 AM CDT	Special Weather Statement	TSA	Mayes	38 min
Apr 23, 2:37 PM CDT	River Flood Warning	TSA	Adair	4 days
Apr 23, 2:47 PM CDT	River Flood Advisory	TSA	Cherokee, Delaware	50 hr
Apr 23, 3:40 PM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 13 more	4 days
Apr 23, 4:51 PM CDT	Special Weather Statement	TSA	Sequoyah	39 min
Apr 23, 5:08 PM CDT	Severe Thunderstorm Warning	TSA	Adair	29 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.