Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

April 11, 2012Okmulgee County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 11, 2012, 3:21 AM CDT for Okmulgee County, Oklahoma. It was in force for 24 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 11, 2012, 3:21 AM CDT (08:21 UTC)
Expired: Apr 11, 2012, 3:45 AM CDT
In force: 24 min
Issued by: NWS Tulsa, OK

County Okmulgee County, OK

The radar

The Tulsa radar (KINX), 65 km from the middle of the area, began a volume at 08:25 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

Norman, OK (KOUN), launched 00:00Z, 8.4 hours before the alert went out and 154 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: 843 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1271 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

347 
WWUS84 KTSA 110821
SPSTSA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
321 AM CDT WED APR 11 2012

OKZ066-070-071-110845-
MCINTOSH OK-MUSKOGEE OK-OKMULGEE OK-
321 AM CDT WED APR 11 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 345 AM CDT
FOR THE FOLLOWING COUNTIES...

IN SOUTHEAST OKLAHOMA
     NORTHERN MCINTOSH

IN EAST CENTRAL OKLAHOMA
     WESTERN MUSKOGEE

IN NORTHEAST OKLAHOMA
     EASTERN OKMULGEE

AT 321 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTH OF
MORRIS...MOVING NORTHEAST AT 15 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...COUNCIL
HILL.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL.

LAT...LON 3573 9572 3555 9562 3550 9586 3558 9593
TIME...MOT...LOC 0821Z 240DEG 15KT 3557 9583

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 2:39 AM CDT	Special Weather Statement	TSA	Tulsa	36 min
Apr 11, 3:09 AM CDT	Special Weather Statement	TSA	McIntosh	36 min
Apr 11, 3:10 AM CDT	Special Weather Statement	TSA	Pawnee	35 min
Apr 11, 3:25 AM CDT	Special Weather Statement	TSA	Sequoyah	35 min
Apr 11, 3:44 AM CDT	Special Weather Statement	TSA	Muskogee	31 min
Apr 11, 4:15 AM CDT	Special Weather Statement	TSA	McIntosh	30 min
Apr 11, 4:19 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	27 min
Apr 11, 4:48 AM CDT	Special Weather Statement	TSA	Haskell	42 min
Apr 11, 4:56 AM CDT	Special Weather Statement	TSA	Latimer	34 min
Apr 11, 5:02 AM CDT	Special Weather Statement	TSA	Creek	28 min
Apr 11, 6:27 AM CDT	Special Weather Statement	TSA	McIntosh	33 min

Nearby

Special Weather Statements in Oklahoma, 2012 Every special weather statement 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.