Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS Tulsa, OK

February 20, 20126 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 20, 2012, 4:50 PM CST for 6 counties in Oklahoma. It was in force for 40 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 20, 2012, 4:50 PM CST (22:50 UTC)
Expired: Feb 20, 2012, 5:30 PM CST
In force: 40 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Creek County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Tulsa County, OK

The radar

The Tulsa radar (KINX), 75 km from the middle of the area, began a volume at 22:49 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 20, 2:50 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.8 hours before the alert went out and 128 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: 713 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 333 m²/s²
0-3 km storm-relative helicity: 436 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.

671 
WUUS54 KTSA 202250
SVRTSA
OKC037-107-111-113-117-143-202330-
/O.NEW.KTSA.SV.W.0003.120220T2250Z-120220T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
450 PM CST MON FEB 20 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OKFUSKEE COUNTY IN EAST CENTRAL OKLAHOMA
  CREEK COUNTY IN NORTHEAST OKLAHOMA
  OKMULGEE COUNTY IN NORTHEAST OKLAHOMA
  SOUTHEASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA
  TULSA COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 530 PM CST

* AT 445 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 3 MILES SOUTHWEST OF JENNINGS TO 6 MILES WEST OF
  BEARDEN...MOVING EAST AT 55 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...
  WIND GUSTS TO 65 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  TERLTON...BEARDEN...WELTY...CASTLE...BRISTOW...OKEMAH...MANNFORD...
  WESTPORT...SLICK...OKFUSKEE...WALNUT CREEK STATE PARK...KEYSTONE
  STATE PARK...CLEARVIEW...KELLYVILLE...WELEETKA...PHAROAH...
  SAPULPA...OKMULGEE STATE PARK...BEGGS...SAND SPRINGS...WILSON...
  MOUNDS...KIEFER...HENRYETTA...PRESTON...GLENPOOL...SCHULTER...
  OKMULGEE...DEWAR...JENKS...SPERRY...TULSA...GRAYSON...MORRIS...
  HOFFMAN...BIXBY...BALD HILL AND OWASSO.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 181 AND 232.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 212 AND 243.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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


&&

LAT...LON 3623 9666 3633 9583 3590 9579 3590 9582
      3586 9582 3585 9578 3555 9575 3555 9582
      3547 9582 3546 9588 3538 9588 3537 9598
      3530 9600 3528 9643 3545 9645 3545 9648
      3543 9649 3543 9650
TIME...MOT...LOC 2250Z 258DEG 48KT 3616 9651 3535 9642

$$

2 follow-up statements

358 
WWUS54 KTSA 202315
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
515 PM CST MON FEB 20 2012

OKC037-107-111-113-117-143-202330-
/O.CON.KTSA.SV.W.0003.000000T0000Z-120220T2330Z/
CREEK OK-OKFUSKEE OK-OKMULGEE OK-OSAGE OK-PAWNEE OK-TULSA OK-
515 PM CST MON FEB 20 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CST FOR
TULSA...PAWNEE...SOUTHEASTERN OSAGE...OKMULGEE...OKFUSKEE AND CREEK
COUNTIES...

AT 513 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTH OF SAND SPRINGS TO BRYANT...MOVING EAST
AT 55 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 65 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
HENRYETTA...PRESTON...GLENPOOL...SCHULTER...OKMULGEE...DEWAR...
LIBERTY...JENKS...SPERRY...HECTORVILLE...TULSA...GRAYSON...MORRIS...
HOFFMAN...BIXBY...BALD HILL...OWASSO AND LEONARD.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 180 AND 232.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 212 AND 243.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3633 9583 3590 9579 3590 9582 3588 9582
      3584 9578 3555 9575 3555 9582 3547 9582
      3546 9588 3538 9588 3537 9598 3530 9600
      3528 9643 3545 9645 3545 9648 3543 9650
      3623 9665
TIME...MOT...LOC 2315Z 258DEG 48KT 3623 9610 3542 9602

$$

608 
WWUS54 KTSA 202327
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
527 PM CST MON FEB 20 2012

OKC037-107-111-113-117-143-202337-
/O.EXP.KTSA.SV.W.0003.000000T0000Z-120220T2330Z/
CREEK OK-OKFUSKEE OK-OKMULGEE OK-OSAGE OK-PAWNEE OK-TULSA OK-
527 PM CST MON FEB 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR TULSA...PAWNEE...SOUTHEASTERN
OSAGE...OKMULGEE...OKFUSKEE AND CREEK COUNTIES EXPIRES AT 530 PM
CST...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.

GUSTY WINDS...SMALL HAIL AND HEAVY RAIN WILL STILL BE POSSIBLE WITH
THIS STORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM CST!

LAT...LON 3633 9583 3590 9579 3590 9582 3588 9582
      3584 9578 3555 9575 3555 9582 3547 9582
      3546 9588 3538 9588 3537 9598 3530 9600
      3528 9643 3545 9645 3545 9648 3543 9650
      3623 9665
TIME...MOT...LOC 2327Z 258DEG 48KT 3626 9590 3545 9583

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 4:02 AM CST	Wind Advisory	TSA	Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 12 more	17 hr
Feb 20, 3:54 PM CST	Special Weather Statement	TSA	Creek, Okfuskee, Osage, Pawnee	66 min
Feb 20, 4:32 PM CST	Severe Thunderstorm Warning	TSA	Osage	28 min
Feb 20, 4:55 PM CST	Special Weather Statement	TSA	Osage, Pawnee, Washington	50 min
Feb 20, 5:31 PM CST	Special Weather Statement	TSA	McIntosh, Okfuskee, Okmulgee, Rogers, Tulsa, Wagoner	59 min
Feb 20, 5:45 PM CST	Special Weather Statement	TSA	Craig, Nowata, Washington	45 min

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.