Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 1, NWS Norman, OK

February 27, 2011Kay County, Oklahoma

NWS Norman, OK issued this tornado warning at Feb 27, 2011, 5:45 PM CST for Kay County, Oklahoma. It was in force for 30 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: Feb 27, 2011, 5:45 PM CST (23:45 UTC)
Expired: Feb 27, 2011, 6:15 PM CST
In force: 30 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Kay County, OK

The radar

The Wichita radar (KICT), 88 km from the middle of the area, began a volume at 23:45 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
Feb 27, 6:00 PM CST	HAIL 1	8 Ne Newkirk, 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
Feb 27, 2:46 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.8 hours before the alert went out and 196 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: 915 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 249 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

327 
WFUS54 KOUN 272345
TOROUN
OKC071-280015-
/O.NEW.KOUN.TO.W.0001.110227T2345Z-110228T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
545 PM CST SUN FEB 27 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN KAY COUNTY IN NORTHERN OKLAHOMA...

* UNTIL 615 PM CST

* AT 545 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES NORTHWEST OF
  NEWKIRK...MOVING EAST AT 55 MPH.

* LOCATIONS IN THE WARNING INCLUDE CHILOCCO...NEWKIRK AND PECKHAM.

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 3699 9675 3690 9694 3686 9723 3700 9728
TIME...MOT...LOC 2345Z 250DEG 47KT 3692 9712

$$

2 follow-up statements

012 
WWUS54 KOUN 280000
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
600 PM CST SUN FEB 27 2011

OKC071-280015-
/O.CON.KOUN.TO.W.0001.000000T0000Z-110228T0015Z/
KAY OK-
600 PM CST SUN FEB 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CST FOR EXTREME 
NORTHEASTERN KAY COUNTY...

AT 600 PM CST...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES WEST OF 
HARDY...MOVING EAST NORTHEAST AT 50 MPH. GOLFBALL HAIL ALSO IS 
LIKELY WITH THIS STORM.

* LOCATIONS IN THE WARNING INCLUDE HARDY.

LAT...LON 3694 9701 3699 9706 3699 9675 3694 9686
TIME...MOT...LOC 0000Z 249DEG 44KT 3697 9690

$$

567 
WWUS54 KOUN 280012
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
612 PM CST SUN FEB 27 2011

OKC071-280020-
/O.EXP.KOUN.TO.W.0001.000000T0000Z-110228T0015Z/
KAY OK-
612 PM CST SUN FEB 27 2011

...THE TORNADO WARNING FOR EXTREME NORTHEASTERN KAY COUNTY WILL 
EXPIRE AT 615 PM CST...

THE STORM HAS MOVED OUT OF THE AREA.

LAT...LON 3694 9701 3699 9706 3699 9675 3694 9686
TIME...MOT...LOC 0006Z 249DEG 44KT 3700 9681

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 26, 9:00 PM CST	Dense Fog Advisory	OUN	Alfalfa, Blaine, Garfield, Grant, Harper, Kay and 7 more	13 hr
Feb 27, 4:24 AM CST	Wind Advisory	OUN	Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 15 more	18 hr
Feb 27, 4:33 PM CST	Severe Thunderstorm Warning	OUN	Grant	42 min
Feb 27, 5:12 PM CST	Severe Thunderstorm Warning	OUN	Grant, Kay	63 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.