Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 2, NWS Norman, OK

April 8, 2011Kay County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 8, 2011, 6:44 PM CDT for Kay County, Oklahoma. It was in force for 31 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 8, 2011, 6:44 PM CDT (23:44 UTC)
Expired: Apr 8, 2011, 7:15 PM CDT
In force: 31 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Kay County, OK

The radar

The Wichita radar (KICT), 102 km from the middle of the area, began a volume at 23:46 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 8, 7:10 PM CDT	HAIL 1	3 S 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
Apr 8, 5:35 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 11.7 hours before the alert went out and 58 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2243 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 89 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.

206 
WFUS54 KOUN 082344
TOROUN
OKC071-090015-
/O.NEW.KOUN.TO.W.0002.110408T2344Z-110409T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
644 PM CDT FRI APR 8 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

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

* UNTIL 715 PM CDT

* AT 644 PM CDT...STORM SPOTTERS REPORTED A TORNADO NEAR KILDARE...
  OR ABOUT 4 MILES SOUTHEAST OF NEWKIRK...MOVING EAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE KILDARE AND NORTHERN KAW LAKE.

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 3688 9679 3678 9675 3677 9678 3677 9706
      3685 9709 3689 9699 3695 9685
TIME...MOT...LOC 2344Z 254DEG 21KT 3681 9699

$$

BURKE

2 follow-up statements

335 
WWUS54 KOUN 082353
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
653 PM CDT FRI APR 8 2011

OKC071-090015-
/O.CON.KOUN.TO.W.0002.000000T0000Z-110409T0015Z/
KAY OK-
653 PM CDT FRI APR 8 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR EASTERN
KAY COUNTY...

AT 653 PM CDT...A TORNADO WAS DETECTED BY RADAR NEAR KILDARE...MOVING
EAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE KILDARE AND NORTHERN KAW LAKE.

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 3688 9679 3678 9675 3677 9678 3677 9706
      3685 9709 3689 9699 3695 9685
TIME...MOT...LOC 2353Z 263DEG 16KT 3681 9702

$$

BURKE

756 
WWUS54 KOUN 090014
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
714 PM CDT FRI APR 8 2011

OKC071-090023-
/O.EXP.KOUN.TO.W.0002.000000T0000Z-110409T0015Z/
KAY OK-
714 PM CDT FRI APR 8 2011

...THE TORNADO WARNING FOR EASTERN KAY COUNTY WILL EXPIRE AT 715 PM
CDT...

ROTATION HAD WEAKENED...BUT THIS WAS STILL A DANGEROUS SEVERE STORM. 
IT WILL PRODUCE DESTRUCTIVE HAIL TO BASEBALL SIZE OR LARGER IN 
EASTERN KAY COUNTY NEAR HARDY AND KAW LAKE.

LAT...LON 3688 9679 3678 9675 3677 9678 3677 9706
      3685 9709 3689 9699 3695 9685
TIME...MOT...LOC 0013Z 263DEG 16KT 3682 9691

$$

BURKE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 4:59 AM CDT	Red Flag Warning	OUN	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more	16 hr
Apr 8, 2:45 PM CDT	Fire Weather Watch	OUN	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 8 more	15 hr
Apr 8, 2:45 PM CDT	Fire Weather Watch	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Carter and 34 more	25 hr
Apr 8, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	54 min
Apr 8, 5:38 PM CDT	Special Weather Statement	OUN	Kay	22 min
Apr 8, 5:46 PM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	59 min
Apr 8, 6:01 PM CDT	Special Weather Statement	OUN	Major	29 min
Apr 8, 6:13 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Major	62 min
Apr 8, 6:25 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	50 min
Apr 8, 6:32 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	73 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.