Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 73, NWS Norman, OK

June 11, 2011Ellis County, Oklahoma

NWS Norman, OK issued this tornado warning at Jun 11, 2011, 7:57 PM CDT for Ellis County, Oklahoma. It was in force for 48 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
Jun 11, 2011, 7:57 PM CDT (00:57 UTC)
Expired
Jun 11, 2011, 8:45 PM CDT
In force
48 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

County Ellis County, OK

The radar

The Dodge City radar (KDDC), 138 km from the middle of the area, began a volume at 00:58 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.

IssuedProductOfficeLasted
Jun 11, 3:39 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 1.0 hours before the alert went out and 139 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-pSkew-T log-p diagram, Dodge City, at 00:00Z on 2011-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 889 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 00:00Z on 2011-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
889 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
1800 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
187 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.

465 
WFUS54 KOUN 120057
TOROUN
OKC045-120145-
/O.NEW.KOUN.TO.W.0073.110612T0057Z-110612T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
757 PM CDT SAT JUN 11 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN ELLIS COUNTY IN NORTHWEST OKLAHOMA...

* UNTIL 845 PM CDT

* AT 757 PM CDT...STORM SPOTTERS REPORTED A TORNADO 3 MILES 
NORTHWEST OF FOLLETT...  MOVING EAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE CATESBY.

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 3659 9978 3640 9977 3643 10000 3659 10000
TIME...MOT...LOC 0057Z 269DEG 14KT 3646 10014

$$
2 follow-up statements
325 
WWUS54 KOUN 120122
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
822 PM CDT SAT JUN 11 2011

OKC045-120145-
/O.CON.KOUN.TO.W.0073.000000T0000Z-110612T0145Z/
ELLIS OK-
822 PM CDT SAT JUN 11 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
NORTHWESTERN ELLIS COUNTY...

AT 821 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES EAST OF 
FOLLETT...MOVING EAST AT 20 MPH. THE AREA OF STRONGEST ROTATION WILL 
CROSS INTO NORTHERN ELLIS COUNTY ABOUT 4 TO 5 MILES SOUTHWEST OF 
CATESBY. 

* LOCATIONS IN THE WARNING INCLUDE CATESBY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO A TORNADO THREAT... THIS STORM LIKELY CONTAINS
DAMAGING HAIL TO THE SIZE OF GOLFBALLS OR LARGER.

&&

LAT...LON 3659 9978 3640 9977 3643 10000 3659 10000
TIME...MOT...LOC 0121Z 273DEG 17KT 3645 10000

$$
170 
WWUS54 KOUN 120139
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
839 PM CDT SAT JUN 11 2011

OKC045-120145-
/O.CON.KOUN.TO.W.0073.000000T0000Z-110612T0145Z/
ELLIS OK-
839 PM CDT SAT JUN 11 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
NORTHWESTERN ELLIS COUNTY...

AT 839 PM CDT...RADAR AND STORM SPOTTERS OBSERVED STRONG ROTATION 12 
MILES NORTHWEST OF GAGE...MOVING EAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE CATESBY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO MAY BE OBSCURED BY RAIN AND MAY NOT BE VISIBLE. 
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 3659 9978 3640 9977 3643 10000 3659 10000
TIME...MOT...LOC 0139Z 266DEG 24KT 3645 9987

$$


24

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 7:08 PM CDTSevere Thunderstorm WarningOUNBlaine, Custer, Dewey37 min
Jun 11, 7:12 PM CDTSpecial Weather StatementOUNGarfield33 min
Jun 11, 7:36 PM CDTSevere Thunderstorm WarningOUNBlaine39 min
Jun 11, 7:38 PM CDTSpecial Weather StatementOUNEllis37 min
Jun 11, 7:45 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant45 min
Jun 11, 8:13 PM CDTSevere Thunderstorm WarningOUNBlaine, Canadian, Kingfisher62 min
Jun 11, 8:29 PM CDTSevere Thunderstorm WarningOUNGrant31 min
Jun 11, 8:42 PM CDTTornado WarningOUNEllis, Woodward48 min
Jun 11, 9:20 PM CDTSpecial Weather StatementOUNGarfield, Kingfisher25 min
Jun 11, 9:23 PM CDTSpecial Weather StatementOUNEllis22 min
Jun 11, 9:27 PM CDTSevere Thunderstorm WarningOUNWoods48 min
Jun 11, 9:30 PM CDTSevere Thunderstorm WarningOUNWoodward60 min
Jun 11, 9:36 PM CDTSevere Thunderstorm WarningOUNEllis39 min
Jun 11, 9:44 PM CDTSpecial Weather StatementOUNGrant31 min
Jun 11, 9:58 PM CDTSpecial Weather StatementOUNHarper32 min
Jun 11, 10:13 PM CDTSevere Thunderstorm WarningOUNEllis32 min
Jun 11, 10:17 PM CDTSpecial Weather StatementOUNNoble28 min
Jun 11, 10:39 PM CDTSevere Thunderstorm WarningOUNWoodward36 min
Jun 11, 10:45 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant, Major, Woods, Woodward45 min
Jun 11, 11:08 PM CDTSpecial Weather StatementOUNDewey22 min
Jun 11, 11:14 PM CDTSpecial Weather StatementOUNRoger Mills31 min
Jun 11, 11:45 PM CDTSpecial Weather StatementOUNBlaine, Custer, Dewey, Garfield, Grant, Kay and 2 more30 min
Jun 11, 11:55 PM CDTSevere Thunderstorm WarningOUNGrant, Kay50 min
Jun 12, 12:05 AM CDTSevere Thunderstorm WarningOUNGarfield55 min
Jun 12, 12:24 AM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kay, Logan, Noble, Payne81 min
Jun 12, 12:34 AM CDTSpecial Weather StatementOUNBlaine, Kingfisher, Logan26 min
Jun 12, 1:14 AM CDTSpecial Weather StatementOUNKingfisher, Logan31 min
Jun 12, 1:55 AM CDTSpecial Weather StatementOUNLogan, Payne20 min
Jun 12, 4:54 AM CDTFire Weather WatchOUNAlfalfa, Beckham, Custer, Dewey, Ellis, Harper and 5 more24 hr

Nearby

Tornado Warnings in Oklahoma, 2011Every tornado warning in 2011Tornadoes 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.