Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 47, NWS Tulsa, OK

April 22, 2011Adair County, Cherokee County, Delaware County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 22, 2011, 6:03 PM CDT for Adair County, Cherokee County, Delaware County, Oklahoma. It was in force for 27 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 22, 2011, 6:03 PM CDT (23:03 UTC)
Expired: Apr 22, 2011, 6:30 PM CDT
In force: 27 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Adair County, OK, Cherokee County, OK, Delaware County, OK

The radar

The Tulsa radar (KINX), 78 km from the middle of the area, began a volume at 23:04 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 22, 6:15 PM CDT	HAIL 1.5	4 N Kansas, OK
Apr 22, 6:16 PM CDT	TORNADO	5 E Kansas, OK	A BRIEF TORNADO WAS REPORTED BY AREA FIRE DEPARTMENTS IN THE FLINT CREEK AREA. NO DAMAGE WAS REPORTED. THIS IS PRELIMINARY REPORT.
Apr 22, 6:30 PM CDT	HAIL 1.25	Colcord, OK

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 22, 3:47 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.1 hours before the alert went out and 110 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: 148 J/kg
Mixed-layer CIN: -391 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 516 m²/s²
0-3 km storm-relative helicity: 554 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

558 
WFUS54 KTSA 222303
TORTSA
OKC001-021-041-222330-
/O.NEW.KTSA.TO.W.0047.110422T2303Z-110422T2330Z/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  NORTHWESTERN ADAIR COUNTY IN NORTHEAST OKLAHOMA
  SOUTHERN DELAWARE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 630 PM CDT

* AT 559 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR LEACH...MOVING EAST AT 30 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...OAKS...
  TWIN OAKS...KANSAS...COLCORD...WEST SILOAM SPRINGS AND WATTS.

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 3624 9458 3623 9457 3611 9455 3610 9501
      3631 9501 3636 9459
TIME...MOT...LOC 2303Z 264DEG 26KT 3622 9491

$$

2 follow-up statements

869 
WWUS54 KTSA 222313
SVSTSA

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

OKC001-021-041-222330-
/O.CON.KTSA.TO.W.0047.000000T0000Z-110422T2330Z/
DELAWARE OK-ADAIR OK-CHEROKEE OK-
613 PM CDT FRI APR 22 2011

...TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHEASTERN CHEROKEE...NORTHWESTERN ADAIR AND SOUTHERN DELAWARE
COUNTIES...

AT 612 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED NEAR KANSAS...
MOVING EAST AT 35 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...COLCORD...
WEST SILOAM SPRINGS AND WATTS.

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!

IN ADDITION TO A TORNADO...THIS STORM IS CAPABLE OF PRODUCING PING 
PONG BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. IF NO 
UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN 
AN INTERIOR ROOM AWAY FROM WINDOWS.

&&

LAT...LON 3636 9459 3624 9458 3623 9457 3611 9455
      3614 9496 3632 9495
TIME...MOT...LOC 2313Z 263DEG 32KT 3623 9481

$$

363 
WWUS54 KTSA 222316
SVSTSA

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

OKC001-021-041-222330-
/O.CON.KTSA.TO.W.0047.000000T0000Z-110422T2330Z/
DELAWARE OK-ADAIR OK-CHEROKEE OK-
616 PM CDT FRI APR 22 2011

...TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHEASTERN CHEROKEE...NORTHWESTERN ADAIR AND SOUTHERN DELAWARE
COUNTIES...

AT 612 PM CDT...NWS METEOROLOGISTS AND STORM SPOTTERS CONTINUED TO
TRACK A VERY DANGEROUS TORNADO LOCATED NEAR KANSAS...MOVING EAST AT
35 MPH. A TORNADO HAS BEEN CONFIRMED...TAKE COVER NOW!

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...COLCORD
AND WEST SILOAM SPRINGS.

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 3636 9459 3624 9458 3623 9457 3611 9455
      3614 9495 3632 9495
TIME...MOT...LOC 2316Z 256DEG 31KT 3626 9477

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 3:50 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Tulsa, Wagoner	55 min
Apr 22, 4:02 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	58 min
Apr 22, 4:21 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	39 min
Apr 22, 4:27 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes, Rogers	48 min
Apr 22, 4:29 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	26 min
Apr 22, 4:43 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	32 min
Apr 22, 4:48 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	42 min
Apr 22, 5:03 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	42 min
Apr 22, 5:11 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes	49 min
Apr 22, 5:16 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Muskogee, Okmulgee, Tulsa, Wagoner	44 min
Apr 22, 5:25 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Tulsa, Wagoner	30 min
Apr 22, 5:42 PM CDT	Tornado Warning	TSA	Creek, Okfuskee, Okmulgee	48 min
Apr 22, 5:48 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes	42 min
Apr 22, 5:57 PM CDT	Special Weather Statement	TSA	Wagoner	48 min
Apr 22, 6:21 PM CDT	Tornado Warning	TSA	Adair, Delaware	39 min
Apr 22, 6:25 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Wagoner	50 min
Apr 22, 6:28 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	47 min
Apr 22, 6:28 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	47 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.