Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

February 20, 20128 counties in Oklahoma

NWS Tulsa, OK issued this special weather statement at Feb 20, 2012, 6:29 PM CST for 8 counties in Oklahoma. It was in force for 61 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: Feb 20, 2012, 6:29 PM CST (00:29 UTC)
Expired: Feb 20, 2012, 7:30 PM CST
In force: 61 min
Issued by: NWS Tulsa, OK

Counties Adair County, OK, Cherokee County, OK, Delaware County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Sequoyah County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 68 km from the middle of the area, began a volume at 00:32 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

Springfield, MO (KSGF), launched 00:00Z, 0.5 hours before the alert went out and 157 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: 2222 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 362 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 Feb 20, 5:56 PM CST, 33 minutes earlier.

Area forecast discussion, Feb 20, 5:56 PM CST, 33 minutes before

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Hazardous weather outlook, Feb 20, 4:43 PM CST, 1 hour 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
443 PM CST MON FEB 20 2012

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211100-
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-
440 PM CST MON FEB 20 2012

..SEVERE WEATHER POTENTIAL THROUGH MID EVENING...

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

.DAY ONE...TODAY AND TONIGHT.
SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...GENERALLY FROM AROUND HIGHWAY 75 WEST IN EASTERN OKLAHOMA.
	ONSET...ONGOING.

SIGNIFICANT WINDS.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

FIRE WEATHER DANGER.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

DISCUSSION...
A STRONG WIND DRIVEN STORM SYSTEM AND ASSOCIATED COLD FRONT
WILL SWEEP THROUGH THE REGION THIS EVENING. SURFACE WINDS
WITH THIS SYSTEM WILL BE CAPABLE OF REACHING 40 TO 45 MILES
AN HOUR. THUNDERSTORMS WITHIN THIS SYSTEM WILL BE CAPABLE
OF DAMAGING WINDS OF 50 MILES AN HOUR OR GREATER ALONG WITH
WIND DRIVEN HAIL. INSTABILITY AND THUNDERSTORM INTENSITY WILL
LESSEN ABOUT MID EVENING.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
ACTIVATION OF THE REGIONAL SPOTTER NETWORK LIKELY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...NO HAZARDS.
WEDNESDAY...NO HAZARDS.
THURSDAY...NO HAZARDS.
FRIDAY...NO HAZARDS.
SATURDAY...NO HAZARDS.
SUNDAY...VERY HIGH FIRE WEATHER POTENTIAL...HIGH WIND POTENTIAL.

EXTENDED DISCUSSION...
DRY AND MILD WEATHER WILL PREVAIL FOR MUCH OF THE WEEK...WITH
THE NEXT COLD FRONT AND STRONGER WINDS ARRIVING TOWARD THE
BEGINNING OF NEXT WEEK.

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

In the hours before

Special weather statement, Feb 20, 4:55 PM CST, 1 hour 34 minutes before

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Special weather statement, Feb 20, 5:31 PM CST, 58 minutes before

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Local storm report, Feb 20, 5:35 PM CST, 54 minutes before

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Special weather statement, Feb 20, 5:45 PM CST, 44 minutes before

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Special weather statement, Feb 20, 6:00 PM CST, 29 minutes before

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Special weather statement, Feb 20, 6:29 PM CST, 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
Feb 20, 6:00 PM CST	Special Weather Statement	TSA	Pittsburg	45 min
Feb 20, 6:44 PM CST	Special Weather Statement	TSA	Haskell, Latimer	61 min
Feb 20, 7:07 PM CST	Special Weather Statement	TSA	Choctaw, Pushmataha	53 min
Feb 20, 7:25 PM CST	Special Weather Statement	TSA	Adair, Sequoyah	50 min
Feb 20, 7:31 PM CST	Special Weather Statement	TSA	LeFlore	44 min
Feb 20, 8:14 PM CST	Special Weather Statement	TSA	Franklin, Madison	46 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.