Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

October 13, 2012Cleveland County, Oklahoma

NWS Norman, OK issued this special weather statement at Oct 13, 2012, 6:47 PM CDT for Cleveland County, Oklahoma. It was in force for 43 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: Oct 13, 2012, 6:47 PM CDT (23:47 UTC)
Expired: Oct 13, 2012, 7:30 PM CDT
In force: 43 min
Issued by: NWS Norman, OK

County Cleveland County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.8 hours before the alert went out and 1 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: 885 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 683 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 365 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 8.7

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 Norman, OK wrote its last area forecast discussion before this special weather statement went out at Oct 13, 6:42 PM CDT, 5 minutes earlier.

Area forecast discussion, Oct 13, 6:42 PM CDT, 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
642 PM CDT SAT OCT 13 2012

.DISCUSSION...
AVIATION DISCUSSION FOR THE 00Z TAFS IS BELOW.

&&

.AVIATION...
MVFR CONDITIONS ARE POSSIBLE NEAR AND EAST OF KPNC-KSPS
THROUGH 04Z...THEN HAVE HIGH CONFIDENCE VFR CONDITIONS
WILL PREVAIL.

ADDED MVFR CEILING MENTION NEAR KOKC...KSPS...KOUN...AND KPNC
THROUGH 02 OR 03Z WHERE CONFIDENCE OF OCCURRENCE IS MODERATE.
KLAW MAY BE BRIEFLY AFFECTED AS WELL...THOUGH CONFIDENCE IS TOO
LOW TO MENTION.

BELIEVE MOST...IF NOT ALL...TSRA WILL BE EAST OF THE
TAF SITES BY 00Z. KOUN MAY BE THE ONLY EXCEPTION.

GUSTY WINDS SHOULD QUICKLY SUBSIDE BY 02Z.

WINDS WILL SHIFT TO A NORTHERLY DIRECTION 03-10Z.

MBS

&&

.PREV DISCUSSION... /ISSUED 345 PM CDT SAT OCT 13 2012/

..SEVERE THUNDERSTORMS EXPECTED THROUGH 1 AM CDT TONIGHT
SOUTHEAST OF A CHEROKEE TO QUANAH LINE...

DISCUSSION...
THE MAIN CONCERN IS ONGOING SEVERE THUNDERSTORMS.

CURRENT STORMS NEAR A SEYMOUR TO EL RENO LINE HAVE DEVELOPED JUST
AHEAD AND EAST OF THE DRYLINE. GENERALLY THINK THESE STORMS WILL
CONGEAL INTO ONE MAIN LINE BY 7 PM CDT NEAR AN ARCHER CITY TO ADA
LINE AND QUICKLY MOVE EAST...LIKELY EXITING ATOKA AND BRYAN
COUNTIES BY 1 AM CDT. THINK THE LATEST HRRR RUNS HANDLE THIS
WELL.

THE MAIN HAZARD IS DAMAGING WINDS UP TO 70 MPH...ESPECIALLY ONCE
STORMS FORM INTO ONE MAIN LINE. A COLD POOL OF AIR SEEMS TO BE
DEVELOPING WITH THE LINE OF STORMS FROM FREDERICK TO EL RENO
WHICH WILL ONLY GET STRONGER OVER THE NEXT FEW HOURS. NOT TO
MENTION...FORCING FROM THE APPROACHING MID/UPPER LOW/TROUGH OVER
WESTERN KANSAS AND THE PANHANDLES WILL ALLOW THE LINE OF STORMS
TO GROW AND PERHAPS ACCELERATE OVER THE NEXT SEVERAL HOURS.

THERE IS A POTENTIAL FOR TORNADOES AND LARGE HAIL UP TO GOLF
BALLS WITH DISCRETE SUPERCELLS AHEAD OF THE MAIN DEVELOPING
LINE...WHICH APPEARS TO BE MOST LIKELY SOUTHEAST OF A KNOX
CITY TO OKLAHOMA CITY TO CHANDLER LINE. LOW LCLS WITH SURFACE
DEWPOINTS AROUND 70 DEGREES...50-100 J/KG 0-3KM MLCAPE...AND
0-1 KM SRH 150 TO 300 M2/S2 SUPPORT LOW LEVEL ROTATING
SUPERCELLS. ANY SUPERCELLS WILL MOVE NORTHEAST AROUND
50 MPH.

ALL SEVERE STORMS WILL END BY 1 AM CDT TONIGHT.

BEYOND TONIGHT...GENERALLY DRY AND QUIET WEATHER WILL
PREVAIL. DID NOT CHANGE ANYTHING BEYOND SUNDAY.

MBS

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  52  80  53  83 /  70   0   0   0
HOBART OK         51  82  51  82 /  10   0   0   0
WICHITA FALLS TX  55  83  54  86 /  70   0   0   0
GAGE OK           48  81  43  86 /  10   0   0   0
PONCA CITY OK     53  79  48  81 /  40   0   0   0
DURANT OK         60  82  54  84 / 100   0   0   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

17

Hazardous weather outlook, Oct 13, 4:10 PM CDT, 2 hours 37 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
410 PM CDT SAT OCT 13 2012

OKZ004>048-050>052-TXZ083>090-141000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
410 PM CDT SAT OCT 13 2012

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH 1 AM CDT TONIGHT
ACROSS PARTS OF OKLAHOMA AND WESTERN NORTH TEXAS...SOUTHEAST OF A CHEROKEE
TO HOBART TO QUANAH LINE.

LOCATION...
THE SLIGHT RISK AREA IS SOUTHEAST OF A CHEROKEE TO HOBART TO QUANAH LINE.

TIMING...
THE MOST LIKELY TIME FOR SEVERE STORMS IS NOW THROUGH 1 AM CDT TONIGHT.

IMPACTS...
THE MAIN HAZARD IS DAMAGING WIND GUSTS UP TO 70 MPH.

GOLF BALL SIZED HAIL AND A FEW TORNADOES ARE POSSIBLE WITH DISCRETE
SUPERCELLS AHEAD OF THE MAIN LINE OF STORMS SOUTH OF A KNOX CITY TO
OKLAHOMA CITY TO CHANDLER LINE.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS OKLAHOMA
AND WESTERN NORTH TEXAS ARE URGED TO REMAIN ALERT AND PAY CLOSE ATTENTION
TO THE LATEST WARNINGS AND FORECASTS DUE TO ONGOING SEVERE WEATHER OPERATIONS.

DISCUSSION...
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS OVER THE AREA WHICH DEVELOPED
JUST AHEAD AND EAST OF A DRYLINE WILL FORM ONE MAIN LINE BY 7 PM CDT NEAR
AN ARCHER CITY TO ADA LINE AS FORCING FROM AN APPROACHING MID/UPPER TROUGH
INCREASES. THIS LINE WILL QUICKLY MOVE EAST AROUND 50 MPH AND INTO EASTERN
OKLAHOMA BY 1 AM CDT TONIGHT.

A FEW DISCRETE SUPERCELL THUNDERSTORMS SOUTHEAST OF THE MAIN LINE OF STORMS
WILL AFFECT LOCATIONS SOUTH OF A KNOX CITY TO OKLAHOMA CITY TO CHANDLER LINE
THROUGH AT LEAST 7 PM CDT. THESE STORMS MAY PRODUCE TORNADOES AND LARGE HAIL
UP TO THE SIZE OF GOLF BALLS. THE DEVELOPING LINE OF STORMS MAY OVERTAKE
ANY DISCRETE SUPERCELLS AFTER 7 PM CDT.

DUE TO MODERATE INSTABILITY AND UNSEASONABLY STRONG WIND SHEAR...SOME
STORMS WILL BE SEVERE THROUGH 1 AM CDT TONIGHT.

ALL STORMS AND THE SEVERE WEATHER THREAT WILL END BY 1 AM CDT TONIGHT.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY OCT 14.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...90 PERCENT.

OTHER HAZARDOUS WEATHER...
LOCALLY HEAVY RAINFALL AROUND AN INCH OR TWO FROM STORMS MAY CAUSE
MINOR FLOODING ANYWHERE SOUTHEAST OF A CHEROKEE TO HOBART TO QUANAH LINE
THROUGH 1 AM CDT TONIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
PRIMARILY QUIET WEATHER WILL OCCUR FROM SUNDAY THROUGH THE END OF NEXT
WEEK. OUR NEXT CHANCE FOR THUNDERSTORMS WILL ARRIVE WEDNESDAY NIGHT AS
AN UPPER LEVEL DISTURBANCE AND COLD FRONT MOVE THROUGH THE REGION.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY
5 AM SUNDAY.

MBS

In the hours before

Local storm report, Oct 13, 5:53 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
553 PM CDT SAT OCT 13 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 PM     TSTM WND GST     1 N RINGLING            34.19N 97.59W
10/13/2012  M80.00 MPH       JEFFERSON          OK   MESONET

&&

MBS

Local storm report, Oct 13, 5:57 PM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
557 PM CDT SAT OCT 13 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0553 PM     TSTM WND GST     3 S HEALDTON            34.19N 97.49W
10/13/2012  M61 MPH          CARTER             OK   TRAINED SPOTTER

&&

RBARNES

Local storm report, Oct 13, 6:15 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
615 PM CDT SAT OCT 13 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     TSTM WND DMG     4 ENE WAURIKA           34.19N 97.93W
10/13/2012                   JEFFERSON          OK   TRAINED SPOTTER

            FLAG POLE DOWNED BY STRONG WINDS.

&&

MBS

Local storm report, Oct 13, 6:16 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
616 PM CDT SAT OCT 13 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     TSTM WND DMG     2 E WAURIKA             34.17N 97.96W
10/13/2012                   JEFFERSON          OK   TRAINED SPOTTER

            POWER POLE DOWN OFF HIGHWAY 70 FROM HIGH WINDS

&&

MBS

Special weather statement, Oct 13, 6:43 PM CDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
643 PM CDT SAT OCT 13 2012

OKZ027-038-039-044-045-140015-
COTTON OK-GRADY OK-JEFFERSON OK-STEPHENS OK-COMANCHE OK-
643 PM CDT SAT OCT 13 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN COTTON...SOUTHERN
GRADY...NORTHWESTERN JEFFERSON...STEPHENS AND SOUTHEASTERN
COMANCHE COUNTIES UNTIL 715 PM CDT...

AT 638 PM CDT...A STRONG AREA OF THUNDERSTORMS WAS LOCATED FROM NEAR
WALTERS...TO DUNCAN...TO MARLOW MOVING NORTHEAST AT 60 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
POTENTIALLY SEVERE WINDS GUSTING OVER 55 MPH...

LOCATIONS IMPACTED INCLUDE...
DUNCAN...MARLOW...WALTERS...COMANCHE...TEMPLE...BRAY...EMPIRE CITY...
VELMA...HASTINGS...ADDINGTON...CORUM...WAURIKA LAKE...HULEN AND
COX CITY.

LAT...LON 3418 9843 3445 9839 3480 9773 3441 9757
      3421 9790 3417 9811
TIME...MOT...LOC 2338Z 245DEG 53KT 3438 9832

Special weather statement, Oct 13, 6:47 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
647 PM CDT SAT OCT 13 2012

OKZ025-028-029-140030-
OKLAHOMA OK-MCCLAIN OK-CLEVELAND OK-
647 PM CDT SAT OCT 13 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN OKLAHOMA...
NORTHWESTERN MCCLAIN AND NORTHWESTERN CLEVELAND COUNTIES UNTIL 730
PM CDT...

AT 643 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTH OF
NEWCASTLE...MOVING NORTHEAST AT 60 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
NORMAN...MOORE...NEWCASTLE...NOBLE...BLANCHARD...GOLDSBY...COLE...
LAKE THUNDERBIRD...STANLEY DRAPER LAKE AND TINKER AIR FORCE BASE.

LAT...LON 3516 9714 3503 9766 3526 9766 3546 9733
TIME...MOT...LOC 2343Z 245DEG 53KT 3518 9760

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 1:00 PM CDT	Special Weather Statement	OUN	Jackson, Kiowa	30 min
Oct 13, 1:26 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	49 min
Oct 13, 1:54 PM CDT	Special Weather Statement	OUN	Kiowa	21 min
Oct 13, 2:10 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Jackson, Kiowa, Washita	35 min
Oct 13, 2:43 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Kiowa, Washita	47 min
Oct 13, 3:05 PM CDT	Special Weather Statement	OUN	Kiowa	40 min
Oct 13, 3:14 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady, Kingfisher, Logan, Oklahoma	46 min
Oct 13, 3:16 PM CDT	Special Weather Statement	OUN	Comanche	44 min
Oct 13, 3:27 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	48 min
Oct 13, 3:31 PM CDT	Special Weather Statement	OUN	Pontotoc	29 min
Oct 13, 3:34 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Seminole	27 min
Oct 13, 3:58 PM CDT	Special Weather Statement	OUN	Comanche	47 min
Oct 13, 4:01 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	59 min
Oct 13, 4:10 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	65 min
Oct 13, 4:23 PM CDT	Special Weather Statement	OUN	Lincoln, Payne	22 min
Oct 13, 4:36 PM CDT	Special Weather Statement	OUN	Cleveland	24 min
Oct 13, 5:05 PM CDT	Special Weather Statement	OUN	Oklahoma	25 min
Oct 13, 5:12 PM CDT	Special Weather Statement	OUN	Jefferson	63 min
Oct 13, 5:27 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Love, Murray, Stephens	63 min
Oct 13, 5:49 PM CDT	Special Weather Statement	OUN	Lincoln, Oklahoma	26 min
Oct 13, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Carter, Coal, Garvin, Johnston, Love and 3 more	66 min
Oct 13, 6:43 PM CDT	Special Weather Statement	OUN	Cotton, Stephens	32 min
Oct 13, 6:54 PM CDT	Special Weather Statement	OUN	Cleveland	36 min
Oct 13, 2:25 PM CDT	Special Weather Statement	OUN	Knox, Wilbarger	35 min
Oct 13, 2:49 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	56 min
Oct 13, 3:11 PM CDT	Special Weather Statement	OUN	Wichita	34 min
Oct 13, 3:39 PM CDT	Special Weather Statement	OUN	Baylor	51 min
Oct 13, 3:51 PM CDT	Special Weather Statement	OUN	Wichita	39 min
Oct 13, 4:05 PM CDT	Special Weather Statement	OUN	Archer, Clay	40 min
Oct 13, 4:13 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Clay, Wichita	62 min
Oct 13, 4:34 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	56 min
Oct 13, 4:46 PM CDT	Tornado Warning	OUN	Archer, Clay, Wichita	44 min
Oct 13, 4:46 PM CDT	Tornado Warning	OUN	Archer, Clay, Wichita	30 min
Oct 13, 5:44 PM CDT	Special Weather Statement	OUN	Archer	46 min
Oct 13, 6:38 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Clay	40 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.