Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 5, NWS Tulsa, OK

February 28, 20124 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 28, 2012, 9:41 PM CST for 4 counties in Oklahoma. It was in force for 64 min. 3 reports 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 28, 2012, 9:41 PM CST (03:41 UTC)
Expired: Feb 28, 2012, 10:45 PM CST
In force: 64 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Nowata County, OK, Osage County, OK, Pawnee County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 85 km from the middle of the area, began a volume at 03:41 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 28, 10:24 PM CST	TSTM WND DMG	2 N Dewey, OK	5TH WHEEL TRAILER OVERTURNED AND DAMAGE TO CARPORT JUST NORTH OF DEWEY.
Feb 28, 10:25 PM CST	TSTM WND DMG	Bartlesville, OK	TREE LIMBS AND LARGE SIGNS BLOWN DOWN AND OTHER DEBRIS IN STREETS AROUND TOWN.
Feb 28, 10:30 PM CST	TSTM WND DMG	8 S Bartlesville, OK	SEMI BLOWN OFF ROADWAY INTO CENTER MEDIAN. DRIVER TRANSPORTED TO HOSPITAL WITH INJURIES.

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 28, 8:10 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 3.7 hours before the alert went out and 101 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: 386 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 660 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 369 m²/s²
0-3 km storm-relative helicity: 461 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

471 
WUUS54 KTSA 290341
SVRTSA
OKC105-113-117-147-290445-
/O.NEW.KTSA.SV.W.0005.120229T0341Z-120229T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
941 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN NOWATA COUNTY IN NORTHEAST OKLAHOMA
  OSAGE COUNTY IN NORTHEAST OKLAHOMA
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1045 PM CST

* AT 937 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 10 MILES NORTHEAST OF FORAKER TO 9 MILES NORTHWEST
  OF PAWNEE...MOVING EAST AT 65 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...
  DAMAGING WIND GUSTS TO 70 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  RALSTON...PAWNEE...PEARSONIA...SKEDEE...BIGHEART...BLACKBURN...
  PAWHUSKA...HULAH...OSAGE HILLS STATE PARK...WYNONA...HOMINY...
  OKESA...COPAN...BARNSDALL...BARTLESVILLE...DEWEY...WANN...
  OCHELATA...AVANT...SOUTH COFFEYVILLE AND RAMONA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM
WINDOWS.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3700 9554 3642 9594 3625 9693 3633 9693
      3633 9703 3701 9649
TIME...MOT...LOC 0342Z 269DEG 56KT 3699 9635 3641 9685

$$

1 follow-up statement

901 
WWUS54 KTSA 290407
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1007 PM CST TUE FEB 28 2012

OKC105-113-117-147-290445-
/O.CON.KTSA.SV.W.0005.000000T0000Z-120229T0445Z/
NOWATA OK-OSAGE OK-PAWNEE OK-WASHINGTON OK-
1007 PM CST TUE FEB 28 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CST
FOR WASHINGTON...PAWNEE...OSAGE AND NORTHWESTERN NOWATA COUNTIES...

AT 1002 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTHWEST OF WAH SHA SHE STATE PARK TO
SKEDEE...MOVING EAST AT 65 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...WAH SHA
SHE STATE PARK...HULAH...OSAGE HILLS STATE PARK...WYNONA...
PERSHING...NELAGONEY...HOMINY...OKESA...TALLANT...COPAN...
BARNSDALL...BARTLESVILLE...DEWEY...WANN...WOLCO...OCHELATA...AVANT...
SOUTH COFFEYVILLE AND RAMONA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3700 9554 3642 9594 3634 9640 3633 9677
      3701 9619
TIME...MOT...LOC 0406Z 269DEG 56KT 3699 9610 3641 9660

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 9:01 PM CST	Severe Thunderstorm Warning	TSA	Osage	44 min
Feb 28, 10:15 PM CST	Special Weather Statement	TSA	Creek, Tulsa	30 min
Feb 28, 10:31 PM CST	Special Weather Statement	TSA	Creek, Okmulgee, Tulsa	29 min
Feb 28, 10:47 PM CST	Severe Thunderstorm Warning	TSA	Craig, Nowata, Ottawa, Washington	58 min
Feb 28, 10:57 PM CST	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Tulsa, Wagoner	48 min
Feb 28, 11:31 PM CST	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	30 min
Feb 28, 11:44 PM CST	Severe Thunderstorm Warning	TSA	Ottawa	20 min
Feb 28, 11:48 PM CST	Special Weather Statement	TSA	Wagoner	27 min
Feb 28, 11:53 PM CST	Severe Thunderstorm Warning	TSA	Delaware	52 min
Feb 28, 11:57 PM CST	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	48 min
Feb 29, 12:28 AM CST	Special Weather Statement	TSA	Pittsburg	32 min
Feb 29, 12:36 AM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee	39 min
Feb 29, 12:58 AM CST	Special Weather Statement	TSA	Latimer	32 min
Feb 29, 4:14 AM CST	Fire Weather Watch	TSA	Craig, Creek, Delaware, Mayes, Nowata, Okfuskee and 7 more	23 hr
Feb 29, 4:14 AM CST	Red Flag Warning	TSA	Craig, Nowata, Ottawa	14 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2012 Every severe thunderstorm warning in 2012

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.