Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 296, NWS Tulsa, OK

December 19, 2012Haskell County, LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Dec 19, 2012, 8:54 PM CST for Haskell County, LeFlore County, Sequoyah County, Oklahoma. It was in force for 36 min. 1 report 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, 8:54 PM CST (02:54 UTC)
Expired
Dec 19, 2012, 9:30 PM CST
In force
36 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Haskell County, OK, LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 28 km from the middle of the area, began a volume at 02:54 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

TimeReportWhereRemark
Dec 19, 9:06 PM CSTHAIL 14 N Muldrow, 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.

IssuedProductOfficeLasted
Dec 19, 7:36 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.9 hours before the alert went out and 188 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, Springfield, MO at 00:00Z on 2012-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 78 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, Springfield, MO at 00:00Z on 2012-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 442 square meters per square second.1939587897117136Sfc1 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
78 J/kg
Mixed-layer CIN
-223 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
88 kt
0-1 km storm-relative helicity
442 m²/s²
0-3 km storm-relative helicity
455 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

395 
WUUS54 KTSA 200254
SVRTSA
OKC061-079-135-200330-
/O.NEW.KTSA.SV.W.0296.121220T0254Z-121220T0330Z/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  EASTERN HASKELL COUNTY IN SOUTHEAST OKLAHOMA
  NORTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 930 PM CST

* AT 850 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 6 MILES NORTH OF KEOTA TO KEOTA TO 4 MILES SOUTHEAST
  OF KEOTA...MOVING EAST AT 50 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  GANS...SPIRO...MULDROW...POCOLA...ROLAND...MOFFETT AND ARKOMA.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 311 AND 328.

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 3553 9446 3539 9444 3524 9444 3517 9491
      3527 9493 3535 9497
TIME...MOT...LOC 0254Z 249DEG 43KT 3536 9487 3529 9483
          3522 9483

$$
2 follow-up statements
963 
WWUS54 KTSA 200303
SVSTSA

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

OKC061-200314-
/O.CAN.KTSA.SV.W.0296.000000T0000Z-121220T0330Z/
HASKELL OK-
903 PM CST WED DEC 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN HASKELL COUNTY IS
CANCELLED...

LAT...LON 3520 9482 3531 9480 3540 9482 3553 9446
      3539 9444 3524 9444
TIME...MOT...LOC 0304Z 238DEG 51KT 3543 9473 3536 9466
          3524 9470

$$

OKC079-135-200330-
/O.CON.KTSA.SV.W.0296.000000T0000Z-121220T0330Z/
LE FLORE OK-SEQUOYAH OK-
903 PM CST WED DEC 19 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CST FOR
SOUTHEASTERN SEQUOYAH AND NORTHEASTERN LE FLORE COUNTIES...

AT 901 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM GANS TO COWLINGTON...MOVING NORTHEAST AT 60 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...SPIRO...
MULDROW...SCULLYVILLE...COTTONWOOD...ROLAND...BRADEN...MOFFETT AND
ARKOMA.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 311 AND 328.

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 3520 9482 3531 9480 3540 9482 3553 9446
      3539 9444 3524 9444
TIME...MOT...LOC 0304Z 238DEG 51KT 3543 9473 3536 9466
          3524 9470

$$
340 
WWUS54 KTSA 200315
SVSTSA

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

OKC079-135-200330-
/O.CON.KTSA.SV.W.0296.000000T0000Z-121220T0330Z/
LE FLORE OK-SEQUOYAH OK-
915 PM CST WED DEC 19 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CST FOR
SOUTHEASTERN SEQUOYAH AND NORTHEASTERN LE FLORE COUNTIES...

AT 911 PM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTHWEST OF ROLAND TO ROLAND TO SPIRO...
MOVING NORTHEAST AT 60 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BRADEN...
MOFFETT AND ARKOMA.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 316 AND 328.

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 3521 9473 3547 9463 3553 9446 3539 9444
      3524 9444
TIME...MOT...LOC 0315Z 238DEG 51KT 3552 9452 3544 9450
          3528 9456

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 19, 7:28 PM CSTSpecial Weather StatementTSAPittsburg32 min
Dec 19, 7:46 PM CSTSevere Thunderstorm WarningTSAPittsburg44 min
Dec 19, 8:15 PM CSTSpecial Weather StatementTSALatimer45 min
Dec 19, 8:20 PM CSTSevere Thunderstorm WarningTSAHaskell, Muskogee, Pittsburg, Sequoyah40 min
Dec 19, 8:45 PM CSTSevere Thunderstorm WarningTSAHaskell, Sequoyah45 min
Dec 19, 8:50 PM CSTSpecial Weather StatementTSALatimer, LeFlore, Pushmataha55 min
Dec 19, 9:11 PM CSTSevere Thunderstorm WarningTSALeFlore34 min
Dec 19, 9:23 PM CSTSpecial Weather StatementTSAChoctaw67 min
Dec 19, 9:34 PM CSTSpecial Weather StatementTSALeFlore56 min
Dec 20, 1:09 PM CSTWind AdvisoryTSAAdair4 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2012Every 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.