Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 36, NWS Tulsa, OK

April 9, 2012Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2012, 8:51 PM CDT for Osage County, Oklahoma. It was in force for 54 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 9, 2012, 8:51 PM CDT (01:51 UTC)
Expired
Apr 9, 2012, 9:45 PM CDT
In force
54 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

County Osage County, OK

The radar

The Tulsa radar (KINX), 108 km from the middle of the area, began a volume at 01:53 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 nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 1.9 hours before the alert went out and 103 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 2012-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 944 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 00:00Z on 2012-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939587897Sfc1 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
944 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
945 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

828 
WUUS54 KTSA 100151
SVRTSA
OKC113-100245-
/O.NEW.KTSA.SV.W.0036.120410T0151Z-120410T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
851 PM CDT MON APR 9 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 945 PM CDT

* AT 849 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 12 MILES NORTH OF
  FORAKER...MOVING SOUTHEAST AT 25 MPH.

  STORM HAZARDS INCLUDE...
  DAMAGING GOLF BALL SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  FORAKER...PEARSONIA AND BIGHEART.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF
NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN
AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3686 9612 3666 9647 3700 9663 3700 9662
      3700 9629
TIME...MOT...LOC 0151Z 324DEG 23KT 3703 9652

$$
2 follow-up statements
550 
WWUS54 KTSA 100218
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
918 PM CDT MON APR 9 2012

OKC113-100245-
/O.CON.KTSA.SV.W.0036.000000T0000Z-120410T0245Z/
OSAGE OK-
918 PM CDT MON APR 9 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR
NORTHERN OSAGE COUNTY...

AT 915 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES NORTH OF
PEARSONIA...MOVING SOUTHEAST AT 25 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...PEARSONIA
AND BIGHEART.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF
NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN
AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3690 9651 3695 9645 3700 9629 3686 9612
      3666 9647
TIME...MOT...LOC 0218Z 324DEG 23KT 3689 9639

$$
512 
WWUS54 KTSA 100239
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
939 PM CDT MON APR 9 2012

OKC113-100250-
/O.EXP.KTSA.SV.W.0036.000000T0000Z-120410T0245Z/
OSAGE OK-
939 PM CDT MON APR 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN OSAGE COUNTY EXPIRES
AT 945 PM 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.

LAT...LON 3690 9651 3695 9645 3700 9629 3686 9612
      3666 9647
TIME...MOT...LOC 0240Z 316DEG 19KT 3681 9629

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 7:45 PM CDTSevere Thunderstorm WarningTSAOsage60 min
Apr 9, 8:22 PM CDTSevere Thunderstorm WarningTSAOsage53 min
Apr 9, 9:03 PM CDTSevere Thunderstorm WarningTSACraig, Nowata57 min
Apr 9, 9:04 PM CDTSevere Thunderstorm WarningTSAOsage, Rogers, Washington41 min
Apr 9, 9:30 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa, Washington45 min
Apr 9, 9:41 PM CDTSpecial Weather StatementTSAOsage49 min
Apr 9, 9:56 PM CDTSpecial Weather StatementTSAOttawa49 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.