Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 293, NWS Tulsa, OK

December 19, 2012Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Dec 19, 2012, 7:46 PM CST for Pittsburg County, Oklahoma. It was in force for 44 min. 2 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: Dec 19, 2012, 7:46 PM CST (01:46 UTC)
Expired: Dec 19, 2012, 8:30 PM CST
In force: 44 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Pittsburg County, OK

The radar

The Western Arkansas radar (KSRX), 143 km from the middle of the area, began a volume at 01:46 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
Dec 19, 7:50 PM CST	TSTM WND GST 60	Savanna, OK	ALONG WITH PEA SIZE HAIL AND ABOUT A HALF INCH OF RAIN.
Dec 19, 8:02 PM CST	HAIL 0.75	Mcalester, 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
Dec 19, 7:36 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.8 hours before the alert went out and 154 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: 7 J/kg
Mixed-layer CIN: -200 J/kg
Mixed-layer LCL: 1443 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

480 
WUUS54 KTSA 200146
SVRTSA
OKC121-200230-
/O.NEW.KTSA.SV.W.0293.121220T0146Z-121220T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
746 PM CST WED DEC 19 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 830 PM CST

* AT 742 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 3 MILES WEST OF SAVANNA TO 6 MILES SOUTHWEST OF
  KIOWA...MOVING NORTHEAST AT 60 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  KIOWA...SAVANNA...MCALESTER...KREBS...BLANCO...ALDERSON AND
  HARTSHORNE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. PEOPLE OUTDOORS
SHOULD MOVE INSIDE A STURDY BUILDING. STAY AWAY FROM WINDOWS AND
DOORS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3468 9589 3468 9600 3490 9592 3507 9551
      3470 9551 3467 9589
TIME...MOT...LOC 0146Z 236DEG 52KT 3487 9584 3470 9593

$$

3 follow-up statements

802 
WWUS54 KTSA 200155
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
755 PM CST WED DEC 19 2012

OKC121-200230-
/O.CON.KTSA.SV.W.0293.000000T0000Z-121220T0230Z/
PITTSBURG OK-
755 PM CST WED DEC 19 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CST FOR
SOUTHERN PITTSBURG COUNTY...

AT 752 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM MCALESTER TO PITTSBURG...MOVING NORTHEAST AT 60 MPH.

STORM HAZARDS INCLUDE...
HALF DOLLAR SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
ALDERSON...BACHE...HAILEYVILLE...DOW AND HARTSHORNE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. PEOPLE OUTDOORS
SHOULD MOVE INSIDE A STURDY BUILDING. STAY AWAY FROM WINDOWS AND
DOORS UNTIL THE STORM HAS PASSED.

PEOPLE OUTDOORS SHOULD MOVE INSIDE A STURDY BUILDING. STAY AWAY FROM
WINDOWS AND DOORS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3467 9589 3468 9589 3468 9600 3492 9587
      3507 9551 3470 9552
TIME...MOT...LOC 0155Z 236DEG 52KT 3498 9570 3476 9581

$$

858 
WWUS54 KTSA 200205
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
805 PM CST WED DEC 19 2012

OKC121-200230-
/O.CON.KTSA.SV.W.0293.000000T0000Z-121220T0230Z/
PITTSBURG OK-
805 PM CST WED DEC 19 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CST FOR
CENTRAL PITTSBURG COUNTY...

AT 802 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 8 MILES NORTHEAST OF KREBS TO BLANCO...MOVING
NORTHEAST AT 50 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BACHE...
DOW...HAILEYVILLE AND HARTSHORNE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. PEOPLE OUTDOORS
SHOULD MOVE INSIDE A STURDY BUILDING. STAY AWAY FROM WINDOWS AND
DOORS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3467 9589 3468 9589 3468 9593 3497 9576
      3507 9551 3470 9552
TIME...MOT...LOC 0205Z 242DEG 45KT 3503 9558 3479 9574

$$

468 
WWUS54 KTSA 200221
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
821 PM CST WED DEC 19 2012

OKC121-200231-
/O.EXP.KTSA.SV.W.0293.000000T0000Z-121220T0230Z/
PITTSBURG OK-
821 PM CST WED DEC 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PITTSBURG COUNTY
EXPIRES AT 830 PM CST...

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

GUSTY WINDS TO 40 MPH...SMALL HAIL AND HEAVY RAIN WILL STILL BE 
POSSIBLE WITH THIS LINE OF STORMS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 2 AM.

LAT...LON 3467 9589 3468 9589 3468 9593 3497 9576
      3507 9551 3470 9552
TIME...MOT...LOC 0221Z 242DEG 45KT 3512 9536 3488 9552

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 19, 7:28 PM CST	Special Weather Statement	TSA	Pittsburg	32 min
Dec 19, 8:15 PM CST	Special Weather Statement	TSA	Latimer	45 min
Dec 19, 8:20 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Muskogee, Pittsburg, Sequoyah	40 min
Dec 19, 8:45 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Sequoyah	45 min
Dec 19, 8:50 PM CST	Special Weather Statement	TSA	Latimer, LeFlore, Pushmataha	55 min
Dec 19, 8:54 PM CST	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	36 min
Dec 19, 9:11 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	34 min
Dec 19, 9:23 PM CST	Special Weather Statement	TSA	Choctaw	67 min
Dec 19, 9:34 PM CST	Special Weather Statement	TSA	LeFlore	56 min
Dec 20, 1:09 PM CST	Wind Advisory	TSA	Adair	4 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.