Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 8, NWS Norman, OK

April 14, 2011Coal County, Johnston County, Pontotoc County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 14, 2011, 5:31 PM CDT for Coal County, Johnston County, Pontotoc County, Oklahoma. It was in force for 59 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 14, 2011, 5:31 PM CDT (22:31 UTC)
Expired: Apr 14, 2011, 6:30 PM CDT
In force: 59 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Coal County, OK, Johnston County, OK, Pontotoc County, OK

The radar

The Norman radar (KTLX), 113 km from the middle of the area, began a volume at 22:31 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 14, 2:28 PM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.5 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: 121 J/kg
Mixed-layer CIN: -508 J/kg
Mixed-layer LCL: 937 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 564 m²/s²
0-3 km storm-relative helicity: 551 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

966 
WFUS54 KOUN 142231
TOROUN
OKC029-069-123-142330-
/O.NEW.KOUN.TO.W.0008.110414T2231Z-110414T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
531 PM CDT THU APR 14 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN PONTOTOC COUNTY IN EAST CENTRAL OKLAHOMA...
  SOUTHWESTERN COAL COUNTY IN SOUTHEAST OKLAHOMA...
  NORTHERN JOHNSTON COUNTY IN SOUTHEAST OKLAHOMA...

* UNTIL 630 PM CDT

* AT 532 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES WEST OF
  CONNERVILLE...MOVING EAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE CENTRAHOMA...CLARITA...
  CONNERVILLE...JESSE...OLNEY...PONTOTOC AND TUPELO.

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 3443 9624 3441 9682 3451 9684 3452 9682
      3454 9682 3466 9626
TIME...MOT...LOC 2232Z 258DEG 23KT 3446 9676

$$

2 follow-up statements

640 
WWUS54 KOUN 142249
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
549 PM CDT THU APR 14 2011

OKC029-069-123-142330-
/O.CON.KOUN.TO.W.0008.000000T0000Z-110414T2330Z/
COAL OK-JOHNSTON OK-PONTOTOC OK-
549 PM CDT THU APR 14 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR SOUTHERN
PONTOTOC...NORTHERN JOHNSTON AND CENTRAL COAL COUNTIES...

AT 549 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR PONTOTOC...MOVING
EAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE CENTRAHOMA...CLARITA...JESSE...
  OLNEY...PONTOTOC AND TUPELO.

LAT...LON 3447 9624 3446 9664 3456 9671 3466 9626
TIME...MOT...LOC 2249Z 255DEG 25KT 3450 9661

$$

268 
WWUS54 KOUN 142319
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
619 PM CDT THU APR 14 2011

OKC069-123-142330-
/O.CAN.KOUN.TO.W.0008.000000T0000Z-110414T2330Z/
JOHNSTON OK-PONTOTOC OK-
619 PM CDT THU APR 14 2011

...THE TORNADO WARNING HAS BEEN CANCELLED FOR SOUTHERN PONTOTOC AND
NORTHERN JOHNSTON COUNTIES...

LAT...LON 3452 9625 3453 9642 3457 9645 3462 9643
      3466 9626
TIME...MOT...LOC 2320Z 255DEG 25KT 3458 9636

$$

OKC029-142330-
/O.CON.KOUN.TO.W.0008.000000T0000Z-110414T2330Z/
COAL OK-
619 PM CDT THU APR 14 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR CENTRAL
COAL COUNTY...

AT 620 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES SOUTHEAST OF
TUPELO...MOVING EAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE CENTRAHOMA AND TUPELO.

LAT...LON 3452 9625 3453 9642 3457 9645 3462 9643
      3466 9626
TIME...MOT...LOC 2320Z 255DEG 25KT 3458 9636

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 3:58 AM CDT	High Wind Watch	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 18 more	18 hr
Apr 14, 3:58 AM CDT	Wind Advisory	OUN	Beckham, Custer, Greer, Harmon, Jackson, Kiowa and 3 more	12 hr
Apr 14, 3:58 AM CDT	Wind Advisory	OUN	Atoka, Bryan, Carter, Cleveland, Coal, Cotton and 18 more	42 hr
Apr 14, 3:07 PM CDT	Special Weather Statement	OUN	Carter	23 min
Apr 14, 3:33 PM CDT	Severe Thunderstorm Warning	OUN	Payne	27 min
Apr 14, 3:34 PM CDT	Fire Weather Watch	OUN	Beckham, Caddo, Comanche, Cotton, Custer, Greer and 6 more	13 hr
Apr 14, 3:41 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Murray, Pontotoc	64 min
Apr 14, 4:00 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	60 min
Apr 14, 4:03 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie	42 min
Apr 14, 4:06 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Pontotoc, Pottawatomie, Seminole	39 min
Apr 14, 4:12 PM CDT	Tornado Warning	OUN	Garvin, Murray, Pontotoc	63 min
Apr 14, 4:41 PM CDT	Tornado Warning	OUN	Lincoln, Payne	18 min
Apr 14, 4:42 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love	63 min
Apr 14, 4:45 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Lincoln, Pottawatomie, Seminole	45 min
Apr 14, 4:48 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Murray, Pontotoc	57 min
Apr 14, 5:14 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Johnston, Murray, Pontotoc	61 min
Apr 14, 5:29 PM CDT	Tornado Warning	OUN	Carter, Johnston, Marshall	46 min
Apr 14, 5:31 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie, Seminole	44 min
Apr 14, 6:15 PM CDT	Tornado Warning	OUN	Atoka, Bryan, Johnston, Marshall	75 min
Apr 14, 6:17 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Hughes, Pontotoc	58 min
Apr 14, 6:21 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Seminole	39 min
Apr 14, 6:29 PM CDT	Tornado Warning	OUN	Atoka, Coal	46 min
Apr 14, 6:48 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	42 min
Apr 14, 6:54 PM CDT	Tornado Warning	OUN	Atoka, Coal, Johnston	81 min
Apr 14, 6:59 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Pontotoc	31 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.