Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

June 19, 2011Nowata County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Jun 19, 2011, 2:20 AM CDT for Nowata County, Oklahoma. It was in force for 25 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: Jun 19, 2011, 2:20 AM CDT (07:20 UTC)
Expired: Jun 19, 2011, 2:45 AM CDT
In force: 25 min
Issued by: NWS Tulsa, OK

County Nowata County, OK

The radar

The Tulsa radar (KINX), 87 km from the middle of the area, began a volume at 07:20 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, 7.3 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-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: 4246 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1103 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 15.1

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 Jun 18, 11:21 PM CDT, 2 hours 59 minutes earlier.

Area forecast discussion, Jun 18, 11:21 PM CDT, 2 hours 59 minutes before

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Hazardous weather outlook, Jun 18, 12:58 PM CDT, 13 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1258 PM CDT SAT JUN 18 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-191000-
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-
1258 PM CDT SAT JUN 18 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.
TORNADO.
	RISK...LIMITED.
	AREA...FAR NORTHEAST OKLAHOMA AND FAR NORTHWEST ARKANSAS.
	ONSET...THIS EVENING.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...THIS EVENING.

DANGEROUS HEAT.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...ONGOING.

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

DISCUSSION...
A FRONTAL BOUNDARY WILL REMAIN NEAR THE KANSAS AND OKLAHOMA BORDER
THROUGH THE AFTERNOON AND EVENING. STRONG HEATING ALONG AND SOUTH
OF THIS BOUNDARY WILL COMBINE WITH HIGH ATMOSPHERIC MOISTURE TO RESULT
IN VERY UNSTABLE CONDITIONS AND A WEAKENING CAP BY EARLY EVENING.
IF THE CAP WEAKENS ENOUGH NEAR THIS BOUNDARY BEFORE
SUNSET...SCATTERED THUNDERSTORMS MAY DEVELOP. THESE STORMS
WOULD BE CAPABLE OF PRODUCING VERY LARGE HAIL AND DAMAGING WIND
GUSTS. THERE IS ALSO A LOW CHANCE OF TORNADOES THIS EVENING DUE
TO INCREASING LOW LEVEL WIND SHEAR. IN ADDITION...A COMPLEX OF
THUNDERSTORMS DEVELOPING OVER KANSAS WILL ONCE AGAIN BE POSSIBLE
TONIGHT...AND COULD ALSO AFFECT PORTIONS OF NORTHEAST OKLAHOMA
AND NORTHWEST ARKANSAS.

THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITIES WILL
RESULT IN HEAT INDEX VALUES APPROACHING 105 DEGREES OVER PORTIONS
OF EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS THIS AFTERNOON. A
HEAT ADVISORY WILL CONTINUE THROUGH 7 PM FOR
CREEK...OKFUSKEE...TULSA...AND OKMULGEE COUNTIES...WHERE THE
GREATEST THREAT FOR DANGEROUS HEAT WILL BE.

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

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

EXTENDED DISCUSSION...
THE CHANCE OF THUNDERSTORMS WILL CONTINUE SUNDAY AND SUNDAY NIGHT.
A STRONG UPPER LEVEL DISTURBANCE AND ASSOCIATED COLD FRONT WILL
MOVE INTO THE SOUTHERN AND CENTRAL PLAINS MONDAY THROUGH
TUESDAY...BRINGING A GOOD CHANCE OF THUNDERSTORMS TO MUCH OF THE
AREA. SOME OF THE STORMS COULD BE SEVERE ON ANY OF THESE DAYS BUT
MOST LIKELY DURING THE MONDAY NIGHT AND TUESDAY TIME FRAME.

GUSTY WINDS TO 35 MPH CAN BE EXPECTED SUNDAY AND MONDAY AHEAD OF
THE COLD FRONT...ALONG WITH AFTERNOON HEAT INDEX VALUES OF 100 TO
105 DEGREES. ADDITIONAL HEAT HEADLINES MAY BE REQUIRED THROUGH
MONDAY.

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

In the hours before

Local storm report, Jun 18, 9:42 PM CDT, 4 hours 38 minutes before

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Local storm report, Jun 18, 9:47 PM CDT, 4 hours 33 minutes before

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Special weather statement, Jun 18, 10:08 PM CDT, 4 hours 12 minutes before

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Local storm report, Jun 18, 10:09 PM CDT, 4 hours 11 minutes before

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Local storm report, Jun 18, 10:54 PM CDT, 3 hours 26 minutes before

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Special weather statement, Jun 19, 2:20 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
Jun 18, 7:35 PM CDT	Tornado Warning	TSA	Osage	40 min
Jun 18, 7:48 PM CDT	Severe Thunderstorm Warning	TSA	Osage	57 min
Jun 18, 8:04 PM CDT	Tornado Warning	TSA	Osage	41 min
Jun 18, 8:33 PM CDT	Tornado Warning	TSA	Osage, Washington	42 min
Jun 18, 8:37 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	38 min
Jun 18, 9:11 PM CDT	Tornado Warning	TSA	Nowata, Washington	49 min
Jun 18, 9:16 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	59 min
Jun 18, 9:37 PM CDT	Tornado Warning	TSA	Nowata	43 min
Jun 18, 10:08 PM CDT	Special Weather Statement	TSA	Osage	37 min

Nearby

Special Weather Statements in Oklahoma, 2011 Every special weather statement in 2011

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.