Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 10, NWS Norman, OK

April 14, 2011Atoka County, Coal County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 14, 2011, 6:29 PM CDT for Atoka County, Coal County, Oklahoma. It was in force for 46 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, 6:29 PM CDT (23:29 UTC)
Expired: Apr 14, 2011, 7:15 PM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Atoka County, OK, Coal County, OK

The radar

The Norman radar (KTLX), 146 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 150 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.

335 
WFUS54 KOUN 142329
TOROUN
OKC005-029-150015-
/O.NEW.KOUN.TO.W.0010.110414T2329Z-110415T0015Z/

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

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN ATOKA COUNTY IN SOUTHEAST OKLAHOMA...
  NORTHEASTERN COAL COUNTY IN SOUTHEAST OKLAHOMA...

* UNTIL 715 PM CDT

* AT 629 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CENTRAHOMA...
  MOVING EAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE CENTRAHOMA...CHOCKIE...EXTREME
  NORTHEASTERN ATOKA RESERVOIR AND WARDVILLE.

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 3455 9566 3455 9596 3456 9634 3465 9636
      3477 9608 3469 9608 3469 9589 3468 9587
      3460 9587 3460 9568 3456 9566
TIME...MOT...LOC 2329Z 251DEG 27KT 3462 9628

$$

1 follow-up statement

082 
WWUS54 KOUN 142342
SVSOUN

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

OKC005-029-150015-
/O.CON.KOUN.TO.W.0010.000000T0000Z-110415T0015Z/
COAL OK-ATOKA OK-
642 PM CDT THU APR 14 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHEASTERN ATOKA AND NORTHEASTERN COAL COUNTIES...

AT 642 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES WEST OF
WARDVILLE...MOVING EAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE CHOCKIE...EXTREME NORTHEASTERN
  ATOKA RESERVOIR AND WARDVILLE.

LAT...LON 3455 9566 3456 9598 3459 9624 3470 9625
      3477 9608 3469 9608 3469 9589 3468 9587
      3460 9587 3460 9568 3456 9566
TIME...MOT...LOC 2342Z 251DEG 27KT 3465 9617

$$

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, 5:31 PM CDT	Tornado Warning	OUN	Coal, Johnston, Pontotoc	59 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, 6:48 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.