Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 34, NWS Tulsa, OK

April 9, 2012Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2012, 7:45 PM CDT for Osage County, Oklahoma. It was in force for 60 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
Apr 9, 2012, 7:45 PM CDT (00:45 UTC)
Expired
Apr 9, 2012, 8:45 PM CDT
In force
60 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

County Osage County, OK

The radar

The Tulsa radar (KINX), 100 km from the middle of the area, began a volume at 00:46 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

TimeReportWhereRemark
Apr 9, 8:08 PM CDTHAIL 19 Nnw Bigheart, OKMARBLE TO QUARTER SIZE HAIL COVERING THE GROUND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 0.8 hours before the alert went out and 124 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°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.

352 
WUUS54 KTSA 100045
SVRTSA
OKC113-100145-
/O.NEW.KTSA.SV.W.0034.120410T0045Z-120410T0145Z/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 845 PM CDT

* AT 742 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 19 MILES
  NORTHWEST OF BIGHEART...MOVING SOUTHEAST AT 25 MPH.

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

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

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 3699 9600 3672 9609 3700 9656 3701 9608
TIME...MOT...LOC 0045Z 303DEG 21KT 3704 9643

$$
2 follow-up statements
650 
WWUS54 KTSA 100057
SVSTSA

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

OKC113-100145-
/O.CON.KTSA.SV.W.0034.000000T0000Z-120410T0145Z/
OSAGE OK-
757 PM CDT MON APR 9 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
NORTHEASTERN OSAGE COUNTY...

AT 755 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 13 MILES NORTHWEST
OF BIGHEART...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...
BIGHEART...WAH SHA SHE STATE PARK AND HULAH.

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 3700 9656 3701 9608 3699 9600 3672 9609
TIME...MOT...LOC 0057Z 309DEG 21KT 3699 9637

$$
822 
WWUS54 KTSA 100115
SVSTSA

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

OKC113-100145-
/O.CON.KTSA.SV.W.0034.000000T0000Z-120410T0145Z/
OSAGE OK-
815 PM CDT MON APR 9 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
NORTHEASTERN OSAGE COUNTY...

AT 813 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BIGHEART...
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...
BIGHEART...WAH SHA SHE STATE PARK AND HULAH.

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 3691 9641 3695 9638 3699 9632 3701 9608
      3699 9600 3672 9609
TIME...MOT...LOC 0115Z 314DEG 23KT 3688 9627

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 8:22 PM CDTSevere Thunderstorm WarningTSAOsage53 min
Apr 9, 8:51 PM CDTSevere Thunderstorm WarningTSAOsage54 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.