Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 43, NWS Tulsa, OK

April 14, 20124 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 14, 2012, 4:08 AM CDT for 4 counties in Oklahoma. It was in force for 52 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: Apr 14, 2012, 4:08 AM CDT (09:08 UTC)
Expired: Apr 14, 2012, 5:00 AM CDT
In force: 52 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Nowata County, OK, Osage County, OK, Rogers County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 69 km from the middle of the area, began a volume at 09:08 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
Apr 14, 3:42 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 9.1 hours before the alert went out and 172 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: 677 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

478 
WUUS54 KTSA 140908
SVRTSA
OKC105-113-131-147-141000-
/O.NEW.KTSA.SV.W.0043.120414T0908Z-120414T1000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
408 AM CDT SAT APR 14 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NOWATA COUNTY IN NORTHEAST OKLAHOMA
  EASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  NORTHERN ROGERS COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 500 AM CDT

* AT 404 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 4 MILES WEST OF DEWEY TO 5 MILES NORTH OF OCHELATA
  TO 4 MILES EAST OF BARNSDALL...MOVING NORTHEAST AT 40 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  DEWEY...OCHELATA...COPAN...RAMONA...WANN...TALALA...LENAPAH...
  DELAWARE...WATOVA...SOUTH COFFEYVILLE...NOWATA...NEW ALLUWE AND
  CHELSEA.

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 3696 9540 3694 9541 3694 9543 3660 9543
      3652 9544 3641 9621 3651 9643 3672 9628
      3686 9613 3701 9578 3700 9540
TIME...MOT...LOC 0908Z 245DEG 36KT 3683 9596 3669 9594
          3656 9605

$$

2 follow-up statements

284 
WWUS54 KTSA 140932
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
432 AM CDT SAT APR 14 2012

OKC105-113-131-147-141000-
/O.CON.KTSA.SV.W.0043.000000T0000Z-120414T1000Z/
NOWATA OK-OSAGE OK-ROGERS OK-WASHINGTON OK-
432 AM CDT SAT APR 14 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR
WASHINGTON...NORTHERN ROGERS...EASTERN OSAGE AND NOWATA COUNTIES...

AT 429 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A BROAD LINE 
EXTENDING FROM SOUTH COFFEYVILLE TO NOWATA TO AVANT...MOVING EAST AT 
45 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...NOWATA...
RAMONA...TALALA...NEW ALLUWE AND WATOVA.

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.

VERY HEAVY RAINS MAY QUICKLY FLOOD LOW LYING AREAS SUCH AS CREEKS...
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS AUTOMOBILES CAN QUICKLY STALL.

&&

LAT...LON 3696 9540 3694 9541 3694 9543 3660 9543
      3652 9544 3641 9621 3651 9643 3672 9628
      3686 9613 3701 9578 3700 9540
TIME...MOT...LOC 0932Z 250DEG 38KT 3694 9556 3673 9563
          3649 9606

$$

062 
WWUS54 KTSA 141001
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
501 AM CDT SAT APR 14 2012

OKC105-113-131-147-141011-
/O.EXP.KTSA.SV.W.0043.000000T0000Z-120414T1000Z/
NOWATA OK-OSAGE OK-ROGERS OK-WASHINGTON OK-
501 AM CDT SAT APR 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON...NORTHERN
ROGERS...EASTERN OSAGE AND NOWATA COUNTIES EXPIRES AT 500 AM CDT...

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. VERY HEAVY RAIN MAY RESULT IN MINOR FLOODING OF RURAL 
AND URBAN AREAS. 

TO REPORT PREVIOUS HAIL OR WIND DAMAGE...HAVE THE NEAREST LAW
ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN TULSA.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 AM. 

LAT...LON 3696 9540 3694 9541 3694 9543 3660 9543
      3652 9544 3641 9621 3651 9643 3672 9628
      3686 9613 3701 9578 3700 9540
TIME...MOT...LOC 0932Z 250DEG 38KT 3694 9556 3673 9563
          3649 9606

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:44 PM CDT	Special Weather Statement	TSA	Osage	31 min
Apr 13, 9:16 PM CDT	Special Weather Statement	TSA	Osage	29 min
Apr 13, 9:42 PM CDT	Special Weather Statement	TSA	Osage	33 min
Apr 14, 12:35 AM CDT	Special Weather Statement	TSA	Creek	25 min
Apr 14, 12:40 AM CDT	Special Weather Statement	TSA	Pawnee	35 min
Apr 14, 1:18 AM CDT	Special Weather Statement	TSA	Pawnee	57 min
Apr 14, 2:09 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	66 min
Apr 14, 3:26 AM CDT	Special Weather Statement	TSA	Craig, Nowata	64 min
Apr 14, 3:39 AM CDT	Tornado Warning	TSA	Pawnee	17 min
Apr 14, 3:52 AM CDT	Special Weather Statement	TSA	Washington	53 min
Apr 14, 4:17 AM CDT	Special Weather Statement	TSA	Creek	28 min
Apr 14, 4:28 AM CDT	Severe Thunderstorm Warning	TSA	Creek	47 min
Apr 14, 4:54 AM CDT	Areal Flood Advisory	TSA	Nowata, Osage, Washington	111 min
Apr 14, 5:00 AM CDT	Special Weather Statement	TSA	Craig	45 min
Apr 14, 5:09 AM CDT	Special Weather Statement	TSA	Pawnee	36 min
Apr 14, 5:12 AM CDT	Special Weather Statement	TSA	Creek	33 min
Apr 14, 5:19 AM CDT	Special Weather Statement	TSA	Ottawa	26 min
Apr 14, 5:41 AM CDT	Special Weather Statement	TSA	Pawnee	49 min
Apr 14, 6:23 AM CDT	Special Weather Statement	TSA	Rogers	52 min
Apr 14, 6:32 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers, Tulsa, Washington	43 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.