Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 7, NWS Norman, OK

April 14, 2011Carter County, Johnston County, Marshall County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 14, 2011, 5:29 PM CDT for Carter County, Johnston County, Marshall County, Oklahoma. It was in force for 46 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 14, 2011, 5:29 PM CDT (22:29 UTC)
Expired: Apr 14, 2011, 6:15 PM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Carter County, OK, Johnston County, OK, Marshall County, OK

The radar

The Norman radar (KTLX), 129 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.

What was reported inside it

Time	Report	Where	Remark
Apr 14, 6:09 PM CDT	TORNADO 1	3 Nnw Madill, OK	THIS TORNADO BEGAN 3 MILES NNW OF MADILL AND CONTINUED NORTHEAST INTO JOHNSTON COUNTY... FINALLY LIFTING 5 MILES SSW OF MILBURN. SOME DAMAGE WAS REPORTED WITH THIS TORNADO. THE TIME IS APPROXIMATE.
Apr 14, 6:09 PM CDT	TORNADO	2 N Madill, OK	TORNADO ON GROUND MOVING ENE.
Apr 14, 6:23 PM CDT	HAIL 4.25	Tishomingo, 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 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 121 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.

675 
WFUS54 KOUN 142229
TOROUN
OKC019-069-095-142315-
/O.NEW.KOUN.TO.W.0007.110414T2229Z-110414T2315Z/

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

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN JOHNSTON COUNTY IN SOUTHEAST OKLAHOMA...
  NORTHERN MARSHALL COUNTY IN SOUTHEAST OKLAHOMA...
  SOUTHEASTERN CARTER COUNTY IN SOUTHERN OKLAHOMA...

* UNTIL 615 PM CDT

* AT 529 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR EXTREME
  NORTHWESTERN LAKE MURRAY...MOVING EAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE DICKSON...LITTLE CITY...MADILL...
  MANNSVILLE...NORTHEASTERN LAKE TEXOMA...NORTHERN LAKE MURRAY...
  OAKLAND...RAVIA...REAGAN...RUSSETT AND TISHOMINGO.

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 3442 9674 3408 9656 3407 9714 3415 9714
TIME...MOT...LOC 2229Z 254DEG 21KT 3412 9709

$$

2 follow-up statements

810 
WWUS54 KOUN 142247
SVSOUN

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

OKC019-069-095-142315-
/O.CON.KOUN.TO.W.0007.000000T0000Z-110414T2315Z/
JOHNSTON OK-MARSHALL OK-CARTER OK-
547 PM CDT THU APR 14 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
SOUTHEASTERN CARTER...NORTHERN MARSHALL AND SOUTHWESTERN JOHNSTON
COUNTIES...

AT 547 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES SOUTH OF 
DICKSON...MOVING EAST AT 30 MPH. VERY LARGE HAIL IS LIKELY AROUND 
DICKSON AND MANNSVILLE.

* LOCATIONS IN THE WARNING INCLUDE DICKSON...LITTLE CITY...MADILL...
  MANNSVILLE...NORTHEASTERN LAKE MURRAY...NORTHEASTERN LAKE TEXOMA...
  OAKLAND...RAVIA...REAGAN...RUSSETT AND TISHOMINGO.

LAT...LON 3419 9708 3442 9674 3408 9656 3407 9706
TIME...MOT...LOC 2247Z 260DEG 26KT 3414 9693

$$

843 
WWUS54 KOUN 142255
SVSOUN

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

OKC019-069-095-142315-
/O.CON.KOUN.TO.W.0007.000000T0000Z-110414T2315Z/
JOHNSTON OK-MARSHALL OK-CARTER OK-
555 PM CDT THU APR 14 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR EASTERN
CARTER...NORTHERN MARSHALL AND SOUTHWESTERN JOHNSTON COUNTIES...

AT 554 PM CDT...A TORNADO WAS DETECTED BY RADAR 3 MILES SOUTH OF 
MANNSVILLE...MOVING EAST AT 30 MPH. PERSONS NEAR MANNSVILLE... 
RUSSETT...AND AREAS NEAR AND JUST NORTH OF MADILL SHOULD TAKE COVER.

DAMAGING WIND AND HAIL WILL STILL BE POSSIBLE AS FAR WEST AS DICKSON.

* LOCATIONS IN THE WARNING INCLUDE LITTLE CITY...MADILL...
  MANNSVILLE...NORTHEASTERN LAKE TEXOMA...OAKLAND...RAVIA...REAGAN...
  RUSSETT AND TISHOMINGO.

LAT...LON 3407 9693 3424 9701 3442 9674 3408 9656
TIME...MOT...LOC 2254Z 260DEG 26KT 3415 9686

$$

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, 5:31 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, 6:29 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.