Alert archive / Oklahoma / Tornado Warnings in 2012

Tornado Warning 11, NWS Norman, OK

April 13, 2012Jackson County, Kiowa County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 13, 2012, 6:12 PM CDT for Jackson County, Kiowa County, Oklahoma. It was in force for 33 min. 1 report 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 13, 2012, 6:12 PM CDT (23:12 UTC)
Expired: Apr 13, 2012, 6:45 PM CDT
In force: 33 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Jackson County, OK, Kiowa County, OK

The radar

The Altus AFB radar (KFDR), 53 km from the middle of the area, began a volume at 23:16 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 13, 6:16 PM CDT	TORNADO	3 Se Blair, 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 13, 1:28 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.2 hours before the alert went out and 171 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: 1194 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 554 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 477 m²/s²
0-3 km storm-relative helicity: 512 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 23.9

Open this sounding in Storm Lab

The text

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

591 
WFUS54 KOUN 132312
TOROUN
OKC065-075-132345-
/O.NEW.KOUN.TO.W.0011.120413T2312Z-120413T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
612 PM CDT FRI APR 13 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  KIOWA COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME NORTHEASTERN JACKSON COUNTY IN SOUTHWESTERN OKLAHOMA...

* UNTIL 645 PM CDT

* AT 611 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS 
  DANGEROUS STORM WAS LOCATED NEAR BLAIR...MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BLAIR...MOUNTAIN PARK...ROOSEVELT...WARREN AND TOM STEED RESERVOIR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GET IN...GET DOWN AND COVER UP. TAKE COVER NOW IN A STORM SHELTER 
OR AN INTERIOR ROOM OF A STURDY BUILDING. STAY AWAY FROM DOORS AND 
WINDOWS.

&&

LAT...LON 3478 9938 3482 9930 3481 9925 3484 9925
      3498 9891 3469 9885 3472 9936
TIME...MOT...LOC 2311Z 258DEG 22KT 3475 9929 

$$

MAXWELL

1 follow-up statement

492 
WWUS54 KOUN 132329
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
629 PM CDT FRI APR 13 2012

OKC065-075-132345-
/O.CON.KOUN.TO.W.0011.000000T0000Z-120413T2345Z/
KIOWA OK-JACKSON OK-
629 PM CDT FRI APR 13 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR KIOWA 
AND EXTREME NORTHEASTERN JACKSON COUNTIES...

AT 625 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS 
STORM WAS LOCATED NEAR WARREN...MOVING EAST AT 20 MPH. 

LOCATIONS IMPACTED INCLUDE...
MOUNTAIN PARK...ROOSEVELT...WARREN AND TOM STEED RESERVOIR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GET IN...GET DOWN AND COVER UP. TAKE COVER NOW IN A STORM SHELTER 
OR AN INTERIOR ROOM OF A STURDY BUILDING. STAY AWAY FROM DOORS AND 
WINDOWS.

THE TORNADO WILL BE HIDDEN BY RAIN AND YOU MAY NOT SEE IT. DO NOT 
WAIT. TAKE COVER NOW.

&&

LAT...LON 3481 9926 3481 9925 3484 9925 3498 9891
      3469 9885 3472 9927 3481 9928
TIME...MOT...LOC 2325Z 254DEG 16KT 3477 9923 

$$

MAXWELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 1:27 PM CDT	Special Weather Statement	OUN	Caddo	33 min
Apr 13, 1:49 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	41 min
Apr 13, 1:59 PM CDT	Special Weather Statement	OUN	Kiowa	31 min
Apr 13, 2:06 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Greer, Jackson, Kiowa, Washita	54 min
Apr 13, 2:14 PM CDT	Special Weather Statement	OUN	Comanche	31 min
Apr 13, 2:17 PM CDT	Special Weather Statement	OUN	Jackson	28 min
Apr 13, 2:20 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	25 min
Apr 13, 2:25 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	50 min
Apr 13, 2:28 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	47 min
Apr 13, 2:31 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	59 min
Apr 13, 2:58 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa, Washita	62 min
Apr 13, 3:14 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	46 min
Apr 13, 3:26 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	49 min
Apr 13, 3:28 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	19 min
Apr 13, 3:45 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa	60 min
Apr 13, 3:53 PM CDT	Special Weather Statement	OUN	Kay	52 min
Apr 13, 3:55 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma	65 min
Apr 13, 3:59 PM CDT	Tornado Warning	OUN	Cleveland	31 min
Apr 13, 4:03 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa, Washita	42 min
Apr 13, 4:05 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	40 min
Apr 13, 4:28 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	62 min
Apr 13, 4:40 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	65 min
Apr 13, 4:47 PM CDT	Special Weather Statement	OUN	Logan, Payne	28 min
Apr 13, 4:48 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	57 min
Apr 13, 4:51 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie	54 min
Apr 13, 5:05 PM CDT	Tornado Warning	OUN	Pottawatomie	25 min
Apr 13, 5:09 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	45 min
Apr 13, 5:22 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	38 min
Apr 13, 5:29 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa, Washita	61 min
Apr 13, 5:43 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa	62 min
Apr 13, 5:55 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	50 min
Apr 13, 5:56 PM CDT	Special Weather Statement	OUN	Grant	34 min
Apr 13, 6:13 PM CDT	Special Weather Statement	OUN	Blaine	32 min
Apr 13, 6:16 PM CDT	Special Weather Statement	OUN	Oklahoma	29 min
Apr 13, 6:27 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	18 min
Apr 13, 6:38 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	52 min
Apr 13, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	36 min
Apr 13, 6:46 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Greer, Jackson, Kiowa, Washita	59 min
Apr 13, 6:47 PM CDT	Special Weather Statement	OUN	Grant	13 min

Nearby

Tornado Warnings in Oklahoma, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.