Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 77, NWS Norman, OK

October 22, 2011Carter County, Jefferson County, Stephens County, Oklahoma

NWS Norman, OK issued this tornado warning at Oct 22, 2011, 10:09 PM CDT for Carter County, Jefferson County, Stephens County, Oklahoma. It was in force for 38 min. 2 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: Oct 22, 2011, 10:09 PM CDT (03:09 UTC)
Expired: Oct 22, 2011, 10:47 PM CDT
In force: 38 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Carter County, OK, Jefferson County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 124 km from the middle of the area, began a volume at 03:12 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
Oct 22, 10:17 PM CDT	HAIL 1.75	5 Ese Loco, OK
Oct 22, 10:20 PM CDT	HAIL 1	7 Nnw Healdton, 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
Oct 22, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	14 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.2 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: 1908 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1265 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

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

835 
WFUS54 KOUN 230309
TOROUN
OKC019-067-137-230400-
/O.NEW.KOUN.TO.W.0077.111023T0309Z-111023T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1009 PM CDT SAT OCT 22 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN CARTER COUNTY IN SOUTHERN OKLAHOMA...
  NORTHEASTERN JEFFERSON COUNTY IN SOUTHERN OKLAHOMA...
  SOUTHEASTERN STEPHENS COUNTY IN SOUTHERN OKLAHOMA...

* UNTIL 1100 PM CDT

* AT 1009 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES EAST OF LOCO...
  MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE CORNISH...HEALDTON...LOCO...
  RINGLING AND WILSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. LEAVE MOBILE HOMES AND VEHICLES. IF POSSIBLE...MOVE
TO A BASEMENT OR STORM SHELTER. OTHERWISE MOVE TO AN INTERIOR ROOM OR
HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS AND OUTSIDE
WALLS.

&&

LAT...LON 3414 9731 3407 9755 3436 9776 3446 9761
TIME...MOT...LOC 0309Z 325DEG 22KT 3433 9763

$$



CJS

2 follow-up statements

601 
WWUS54 KOUN 230329
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1029 PM CDT SAT OCT 22 2011

OKC019-067-137-230400-
/O.CON.KOUN.TO.W.0077.000000T0000Z-111023T0400Z/
CARTER OK-JEFFERSON OK-STEPHENS OK-
1029 PM CDT SAT OCT 22 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT FOR
SOUTHEASTERN STEPHENS...NORTHEASTERN JEFFERSON AND SOUTHWESTERN
CARTER COUNTIES...

AT 1027 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES NORTHWEST OF 
HEALDTON...MOVING SOUTHEAST AT 20 MPH. ALTHOUGH THE CIRCULATION HAS 
TEMPORARILY WEAKENED... THE AREA CONTINUES TO BE A CONCERN FOR 
POSSIBLE STRENGTHENING. 

* LOCATIONS IN THE WARNING INCLUDE CORNISH...HEALDTON...RINGLING AND
  WILSON.

LAT...LON 3429 9770 3437 9756 3414 9731 3407 9755
TIME...MOT...LOC 0327Z 321DEG 19KT 3427 9756

$$



CJS

027 
WWUS54 KOUN 230347
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1047 PM CDT SAT OCT 22 2011

OKC019-067-137-230352-
/O.CAN.KOUN.TO.W.0077.000000T0000Z-111023T0400Z/
CARTER OK-JEFFERSON OK-STEPHENS OK-
1047 PM CDT SAT OCT 22 2011

...THE TORNADO WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN
STEPHENS...NORTHEASTERN JEFFERSON AND SOUTHWESTERN CARTER COUNTIES...

THE CIRCULATION ASSOCIATED WITH THIS STORM HAS WEAKENED 
CONSIDERABLY. HOWEVER... THIS STORM CONTINUES TO POSE THE THREAT OF 
PRODUCING SEVERE WEATHER WITH LARGE HAIL AND DAMAGING WINDS.

A SEVERE THUNDERSTORM WARNING CONTINUES IN EFFECT UNTIL 11 PM FOR 
STEPHENS... JEFFERSON AND CARTER COUNTIES.   

LAT...LON 3429 9770 3437 9756 3414 9731 3407 9755
TIME...MOT...LOC 0342Z 321DEG 19KT 3421 9750

$$



CJS
CJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 22, 7:10 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	80 min
Oct 22, 7:31 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	74 min
Oct 22, 7:32 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	48 min
Oct 22, 7:34 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc, Seminole	86 min
Oct 22, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	77 min
Oct 22, 7:53 PM CDT	Special Weather Statement	OUN	Caddo	37 min
Oct 22, 8:02 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pottawatomie, Seminole	58 min
Oct 22, 8:39 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Grady, Murray, Stephens	81 min
Oct 22, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Hughes, Pontotoc	77 min
Oct 22, 9:55 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Love, Murray, Stephens	65 min
Oct 22, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal, Johnston, Marshall	76 min
Oct 22, 10:40 PM CDT	Special Weather Statement	OUN	Cotton	20 min
Oct 22, 10:56 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	49 min
Oct 23, 5:14 AM CDT	Dense Fog Advisory	OUN	Blaine, Canadian, Garfield, Grant, Kay, Kingfisher and 5 more	6 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.