Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

April 11, 2012Creek County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 11, 2012, 5:02 AM CDT for Creek County, Oklahoma. It was in force for 28 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, 5:02 AM CDT (10:02 UTC)
Expired: Apr 11, 2012, 5:30 AM CDT
In force: 28 min
Issued by: NWS Tulsa, OK

County Creek County, OK

The radar

The Tulsa radar (KINX), 89 km from the middle of the area, began a volume at 10:03 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, 10.0 hours before the alert went out and 114 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1476 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Apr 11, 3:47 AM CDT, 1 hour 15 minutes earlier.

Area forecast discussion, Apr 11, 3:47 AM CDT, 1 hour 15 minutes before

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Hazardous weather outlook, Apr 10, 5:03 PM CDT, 11 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
503 PM CDT TUE APR 10 2012

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
503 PM CDT TUE APR 10 2012

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...LATE AFTERNOON AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...LATE AFTERNOON OR EARLY EVENING.

FLASH FLOOD.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...THIS EVENING.

DISCUSSION...
A WEAK STATIONARY FRONT WAS DRAPED ACROSS SOUTHEAST OKLAHOMA LATE
THIS AFTERNOON. ISOLATED THUNDERSTORMS WILL BE POSSIBLE NEAR THIS
BOUNDARY INTO THE EVENING HOURS...AND MAY BE CAPABLE OF PRODUCING
MARGINALLY SEVERE HAIL. ADDITIONAL THUNDERSTORMS ARE EXPECTED TO
DEVELOP LATER THIS EVENING ACROSS PARTS OF EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS...IN RESPONSE TO AN INCREASING SOUTHWESTERLY
LOW-LEVEL JET. A FEW OF THESE STORMS ARE EXPECTED TO BE STRONG TO
SEVERE...WITH LARGE HAIL AND LOCALLY HEAVY RAINFALL BEING THE MAIN
THREAT.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
WEDNESDAY AND THURSDAY...THUNDERSTORM POTENTIAL.
FRIDAY AND SATURDAY ...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND
POTENTIAL.
SUNDAY AND MONDAY...SEVERE THUNDERSTORM POTENTIAL.

EXTENDED DISCUSSION...
THE NEARLY STATIONARY FRONT WILL REMAIN IN THE AREA OVER THE NEXT
FEW DAYS WHICH WILL KEEP THUNDERSTORM CHANCES IN THE FORECAST. LATER
IN THE WEEK...FLOW ALOFT WILL SHIFT TO SOUTHWESTERLY IN ADVANCE OF A
LARGE TROUGH THAT WILL BE POSITIONED ACROSS THE SOUTHWEST UNITED
STATES. SEVERAL SHORTWAVES EMBEDDED WITHIN THIS FLOW WILL MOVE OVER
THE AREA DURING THE WEEKEND...IGNITING AREAS OF STRONG TO SEVERE
STORMS AS THEY PASS. THE GREATEST POSSIBILITY FOR WIDESPREAD SEVERE
WEATHER ACROSS THE AREA AT THIS TIME APPEARS TO BE THIS WEEKEND.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Apr 11, 3:25 AM CDT, 1 hour 37 minutes before

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Special weather statement, Apr 11, 3:44 AM CDT, 1 hour 18 minutes before

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Special weather statement, Apr 11, 4:15 AM CDT, 47 minutes before

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Special weather statement, Apr 11, 4:48 AM CDT, 14 minutes before

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Special weather statement, Apr 11, 4:56 AM CDT, 6 minutes before

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Special weather statement, Apr 11, 5:02 AM CDT, 0 minutes before

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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, 3:21 AM CDT	Special Weather Statement	TSA	Okmulgee	24 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, 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.