Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 27, NWS Norman, OK

May 19, 2011Caddo County, Comanche County, Kiowa County, Oklahoma

NWS Norman, OK issued this tornado warning at May 19, 2011, 5:57 PM CDT for Caddo County, Comanche County, Kiowa County, Oklahoma. It was in force for 33 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: May 19, 2011, 5:57 PM CDT (22:57 UTC)
Expired: May 19, 2011, 6:30 PM CDT
In force: 33 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Caddo County, OK, Comanche County, OK, Kiowa County, OK

The radar

The Altus AFB radar (KFDR), 69 km from the middle of the area, began a volume at 22:58 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
May 19, 12:46 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.0 hours before the alert went out and 112 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: 1483 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

405 
WFUS54 KOUN 192257
TOROUN
OKC015-031-075-192330-
/O.NEW.KOUN.TO.W.0027.110519T2257Z-110519T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
557 PM CDT THU MAY 19 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN CADDO COUNTY IN SOUTHWEST OKLAHOMA...
  NORTHERN COMANCHE COUNTY IN SOUTHWEST OKLAHOMA...
  EXTREME EASTERN KIOWA COUNTY IN SOUTHWEST OKLAHOMA...

* UNTIL 630 PM CDT

* AT 557 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES NORTH OF
  WICHITA MOUNTAINS WILDLIFE REFUGE...MOVING EAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE BOONE AND NORTHERN WICHITA
  MOUNTAINS WILDLIFE REFUGE.

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.

A TORNADO MAY FORM AT ANYTIME. TAKE COVER NOW. ABANDON 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.

&&

LAT...LON 3497 9847 3481 9842 3479 9871 3486 9874
TIME...MOT...LOC 2257Z 255DEG 23KT 3483 9867

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 4:51 AM CDT	Red Flag Warning	OUN	Beckham, Greer, Harmon, Jackson, Kiowa	6 hr
May 19, 12:39 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	66 min
May 19, 1:00 PM CDT	Special Weather Statement	OUN	Beckham	30 min
May 19, 1:01 PM CDT	Special Weather Statement	OUN	Greer, Harmon	29 min
May 19, 1:07 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills, Washita	38 min
May 19, 1:20 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon	40 min
May 19, 1:43 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Roger Mills	47 min
May 19, 1:48 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	57 min
May 19, 1:57 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon, Kiowa, Washita	48 min
May 19, 2:30 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	45 min
May 19, 2:42 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa	48 min
May 19, 2:48 PM CDT	Special Weather Statement	OUN	Roger Mills	27 min
May 19, 3:16 PM CDT	Severe Thunderstorm Warning	OUN	Dewey	44 min
May 19, 3:17 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	43 min
May 19, 3:31 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa, Washita	44 min
May 19, 3:57 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major, Woodward	19 min
May 19, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Jackson, Kiowa, Washita	52 min
May 19, 4:25 PM CDT	Tornado Warning	OUN	Caddo, Comanche, Kiowa	35 min
May 19, 4:37 PM CDT	Special Weather Statement	OUN	Jackson	23 min
May 19, 5:01 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Jackson, Kiowa, Washita	44 min
May 19, 5:09 PM CDT	Tornado Warning	OUN	Caddo, Kiowa	36 min
May 19, 5:29 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	31 min
May 19, 5:38 PM CDT	Areal Flood Advisory	OUN	Greer, Jackson, Kiowa	3 hr
May 19, 5:43 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Jackson, Kiowa, Washita	62 min
May 19, 5:59 PM CDT	Tornado Warning	OUN	Caddo	31 min
May 19, 6:11 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	49 min
May 19, 6:27 PM CDT	Tornado Warning	OUN	Caddo	33 min
May 19, 6:46 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	44 min
May 19, 6:54 PM CDT	Areal Flood Advisory	OUN	Caddo, Kiowa	3 hr
May 19, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	63 min
May 19, 6:59 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	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.