Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 56, NWS Tulsa, OK

April 29, 2012Creek County, Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 29, 2012, 2:43 AM CDT for Creek County, Osage County, Pawnee County, Oklahoma. It was in force for 32 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 29, 2012, 2:43 AM CDT (07:43 UTC)
Expired
Apr 29, 2012, 3:15 AM CDT
In force
32 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Creek County, OK, Osage County, OK, Pawnee County, OK

The radar

The Tulsa radar (KINX), 73 km from the middle of the area, began a volume at 07:43 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.

IssuedProductOfficeLasted
Apr 28, 11:52 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 7.7 hours before the alert went out and 107 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, Lamont, OK at 00:00Z on 2012-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 167 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, Lamont, OK at 00:00Z on 2012-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.19395878Sfc1 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
167 J/kg
Mixed-layer CIN
-203 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
228 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

760 
WUUS54 KTSA 290743
SVRTSA
OKC037-113-117-290815-
/O.NEW.KTSA.SV.W.0056.120429T0743Z-120429T0815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
243 AM CDT SUN APR 29 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 315 AM CDT

* AT 239 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES SOUTHWEST
  OF TERLTON...MOVING NORTHEAST AT 45 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...OSAGE...
  WESTPORT AND WALNUT CREEK STATE PARK.

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 3645 9630 3627 9612 3612 9651 3620 9656
TIME...MOT...LOC 0743Z 237DEG 38KT 3617 9647

$$
2 follow-up statements
073 
WWUS54 KTSA 290757
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
257 AM CDT SUN APR 29 2012

OKC037-117-290807-
/O.CAN.KTSA.SV.W.0056.000000T0000Z-120429T0815Z/
CREEK OK-PAWNEE OK-
257 AM CDT SUN APR 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR PAWNEE AND NORTHERN CREEK
COUNTIES IS CANCELLED...

LAT...LON 3623 9633 3630 9640 3645 9630 3627 9612
TIME...MOT...LOC 0757Z 230DEG 40KT 3628 9633

$$

OKC113-290815-
/O.CON.KTSA.SV.W.0056.000000T0000Z-120429T0815Z/
OSAGE OK-
257 AM CDT SUN APR 29 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR
SOUTHERN OSAGE COUNTY...

AT 256 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WALNUT CREEK
STATE PARK...MOVING NORTHEAST AT 45 MPH.

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

THIS STORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS.

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 9633 3630 9640 3645 9630 3627 9612
TIME...MOT...LOC 0757Z 230DEG 40KT 3628 9633

$$
845 
WWUS54 KTSA 290814
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
314 AM CDT SUN APR 29 2012

OKC113-290822-
/O.EXP.KTSA.SV.W.0056.000000T0000Z-120429T0815Z/
OSAGE OK-
314 AM CDT SUN APR 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN OSAGE COUNTY EXPIRES
AT 315 AM CDT...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA AND 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 5 AM!

LAT...LON 3623 9633 3630 9640 3645 9630 3627 9612
TIME...MOT...LOC 0812Z 230DEG 40KT 3639 9617

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 12:13 AM CDTSpecial Weather StatementTSACreek47 min
Apr 29, 1:00 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee45 min
Apr 29, 1:43 AM CDTSevere Thunderstorm WarningTSACreek, Pawnee30 min
Apr 29, 1:47 AM CDTSpecial Weather StatementTSAPawnee43 min
Apr 29, 2:16 AM CDTSpecial Weather StatementTSAPawnee29 min
Apr 29, 2:35 AM CDTSpecial Weather StatementTSAPawnee40 min
Apr 29, 3:12 AM CDTSpecial Weather StatementTSAWashington33 min
Apr 29, 4:17 AM CDTSpecial Weather StatementTSAOsage, Washington43 min
Apr 29, 4:29 AM CDTSevere Thunderstorm WarningTSAOsage, Tulsa, Washington46 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.