Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 4, NWS Tulsa, OK

February 28, 2012Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 28, 2012, 9:01 PM CST for Osage County, Oklahoma. It was in force for 44 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: Feb 28, 2012, 9:01 PM CST (03:01 UTC)
Expired: Feb 28, 2012, 9:45 PM CST
In force: 44 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Osage County, OK

The radar

The Tulsa radar (KINX), 119 km from the middle of the area, began a volume at 03:02 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.

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, 3.0 hours before the alert went out and 77 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.

605 
WUUS54 KTSA 290301
SVRTSA
OKC113-290345-
/O.NEW.KTSA.SV.W.0004.120229T0301Z-120229T0345Z/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN OSAGE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 945 PM CST

* AT 858 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 13 MILES NORTHWEST OF GRAINOLA TO 34 MILES WEST OF
  BURBANK...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...
  GRAINOLA...FORAKER...SHIDLER...BURBANK...PEARSONIA...BIGHEART...
  HULAH AND PAWHUSKA.

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.

&&

LAT...LON 3699 9600 3694 9600 3662 9635 3662 9706
      3668 9707 3670 9706 3669 9695 3675 9689
      3675 9683 3679 9676 3701 9675
TIME...MOT...LOC 0302Z 269DEG 56KT 3705 9677 3667 9727

$$

1 follow-up statement

289 
WWUS54 KTSA 290321
SVSTSA

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

OKC113-290345-
/O.CON.KTSA.SV.W.0004.000000T0000Z-120229T0345Z/
OSAGE OK-
921 PM CST TUE FEB 28 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CST FOR
NORTHWESTERN OSAGE COUNTY...

AT 920 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 9 MILES NORTHEAST OF GRAINOLA TO 18 MILES SOUTHWEST OF
APPERSON...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 THIS STORM INCLUDE...
GRAINOLA...WEBB CITY...APPERSON...SHIDLER...FORAKER...BURBANK...
PEARSONIA AND BIGHEART.

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.

&&

LAT...LON 3701 9672 3699 9604 3662 9644 3662 9706
      3668 9707 3670 9705 3669 9695 3675 9689
      3675 9683 3679 9676 3698 9675
TIME...MOT...LOC 0322Z 269DEG 56KT 3705 9655 3663 9700

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 9:41 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Osage, Pawnee, Washington	64 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.