Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 607, NWS Norman, OK

November 7, 2011Kay County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Nov 7, 2011, 4:18 PM CST for Kay County, Oklahoma. It was in force for 42 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: Nov 7, 2011, 4:18 PM CST (22:18 UTC)
Expired: Nov 7, 2011, 5:00 PM CST
In force: 42 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Kay County, OK

The radar

The Wichita radar (KICT), 106 km from the middle of the area, began a volume at 22:18 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
Nov 7, 4:34 PM CST	HAIL 1	1 W Tonkawa, 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
Nov 7, 1:11 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.3 hours before the alert went out and 180 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: 1081 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 482 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

409 
WUUS54 KOUN 072218
SVROUN
OKC071-072300-
/O.NEW.KOUN.SV.W.0607.111107T2218Z-111107T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
418 PM CST MON NOV 7 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KAY COUNTY IN NORTHERN OKLAHOMA...

* UNTIL 500 PM CST

* AT 418 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED SEVERE
  THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES NORTHEAST OF
  BRAMAN TO 3 MILES WEST OF TONKAWA...MOVING NORTHEAST AT 30 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
WIND GUSTS TO 60 MPH...

* LOCATIONS IN THE WARNING INCLUDE BLACKWELL...BRAMAN...CHILOCCO...
  HARDY...KAW CITY...KAW LAKE...KILDARE...NEWKIRK...PECKHAM...PONCA
  CITY AND TONKAWA.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 209 AND 225.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

&&

LAT...LON 3699 9674 3679 9674 3678 9678 3674 9683
      3675 9688 3668 9693 3669 9704 3666 9706
      3661 9704 3660 9741 3701 9731 3700 9675
TIME...MOT...LOC 2218Z 213DEG 27KT 3703 9721 3670 9733

$$

1 follow-up statement

291 
WWUS54 KOUN 072241
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
441 PM CST MON NOV 7 2011

OKC071-072300-
/O.CON.KOUN.SV.W.0607.000000T0000Z-111107T2300Z/
KAY OK-
441 PM CST MON NOV 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CST
FOR KAY COUNTY...

AT 441 PM CST...NATIONAL WEATHER SERVICE RADAR DETECTED SEVERE
THUNDERSTORMS ALONG A LINE EXTENDING FROM CHILOCCO TO 6 MILES EAST OF
TONKAWA...MOVING NORTHEAST AT 30 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
WIND GUSTS TO 60 MPH...

* LOCATIONS IN THE WARNING INCLUDE BLACKWELL...CHILOCCO...HARDY...KAW
  CITY...KAW LAKE...KILDARE...NEWKIRK...PECKHAM...PONCA CITY AND
  TONKAWA.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 209 AND 215.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

&&

LAT...LON 3699 9674 3679 9674 3678 9678 3674 9683
      3675 9688 3668 9693 3669 9704 3666 9706
      3661 9704 3660 9741 3701 9719 3700 9675
TIME...MOT...LOC 2241Z 213DEG 27KT 3700 9707 3667 9720

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 6, 9:08 PM CST	Special Weather Statement	OUN	Carter, Murray	37 min
Nov 6, 10:12 PM CST	Special Weather Statement	OUN	Murray	33 min
Nov 6, 10:19 PM CST	Special Weather Statement	OUN	Carter, Jefferson	56 min
Nov 6, 10:55 PM CST	Flash Flood Warning	OUN	Carter, Jefferson	3 hr
Nov 6, 11:47 PM CST	Flash Flood Warning	OUN	Carter, Murray	3 hr
Nov 7, 1:31 AM CST	Flash Flood Warning	OUN	Johnston, Murray, Pontotoc	4 hr
Nov 7, 7:14 AM CST	Special Weather Statement	OUN	Dewey	46 min
Nov 7, 12:25 PM CST	Special Weather Statement	OUN	Beckham	35 min
Nov 7, 1:06 PM CST	Special Weather Statement	OUN	Roger Mills	9 min
Nov 7, 1:16 PM CST	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Roger Mills	59 min
Nov 7, 1:29 PM CST	Special Weather Statement	OUN	Greer, Harmon	31 min
Nov 7, 1:33 PM CST	Special Weather Statement	OUN	Jackson	42 min
Nov 7, 1:49 PM CST	Severe Thunderstorm Warning	OUN	Greer, Harmon	56 min
Nov 7, 2:02 PM CST	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa, Tillman	58 min
Nov 7, 2:14 PM CST	Tornado Warning	OUN	Greer, Harmon, Kiowa	46 min
Nov 7, 2:17 PM CST	Severe Thunderstorm Warning	OUN	Beckham, Blaine, Custer, Dewey, Roger Mills	58 min
Nov 7, 2:44 PM CST	Tornado Warning	OUN	Jackson, Kiowa, Tillman	46 min
Nov 7, 2:47 PM CST	Special Weather Statement	OUN	Grant, Major	43 min
Nov 7, 3:00 PM CST	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa, Washita	60 min
Nov 7, 3:08 PM CST	Tornado Warning	OUN	Kiowa, Washita	52 min
Nov 7, 3:15 PM CST	Special Weather Statement	OUN	Harmon	30 min
Nov 7, 3:23 PM CST	Special Weather Statement	OUN	Roger Mills	37 min
Nov 7, 3:27 PM CST	Tornado Warning	OUN	Comanche, Kiowa, Tillman	48 min
Nov 7, 3:34 PM CST	Special Weather Statement	OUN	Greer	26 min
Nov 7, 3:42 PM CST	Special Weather Statement	OUN	Kay	33 min
Nov 7, 3:42 PM CST	Tornado Warning	OUN	Kiowa	33 min
Nov 7, 3:47 PM CST	Special Weather Statement	OUN	Major	28 min
Nov 7, 4:05 PM CST	Severe Thunderstorm Warning	OUN	Beckham, Greer, Washita	40 min
Nov 7, 4:06 PM CST	Special Weather Statement	OUN	Caddo	24 min
Nov 7, 4:14 PM CST	Tornado Warning	OUN	Caddo, Comanche, Kiowa	46 min
Nov 7, 4:33 PM CST	Severe Thunderstorm Warning	OUN	Beckham, Custer, Kiowa, Washita	42 min
Nov 7, 4:39 PM CST	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	51 min
Nov 7, 4:57 PM CST	Severe Thunderstorm Warning	OUN	Kay	63 min
Nov 7, 4:57 PM CST	Tornado Warning	OUN	Caddo	38 min
Nov 7, 5:16 PM CST	Severe Thunderstorm Warning	OUN	Custer, Kiowa, Washita	59 min
Nov 7, 5:20 PM CST	Severe Thunderstorm Warning	OUN	Beckham, Greer	40 min
Nov 7, 5:37 PM CST	Severe Thunderstorm Warning	OUN	Harmon, Jackson	53 min
Nov 7, 5:48 PM CST	Severe Thunderstorm Warning	OUN	Blaine, Caddo	27 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011 Every severe thunderstorm warning 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.