Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

August 25, 2012Dewey County, Garfield County, Oklahoma

NWS Norman, OK issued this special weather statement at Aug 25, 2012, 5:01 PM CDT for Dewey County, Garfield County, Oklahoma. It was in force for 29 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: Aug 25, 2012, 5:01 PM CDT (22:01 UTC)
Expired: Aug 25, 2012, 5:30 PM CDT
In force: 29 min
Issued by: NWS Norman, OK

Counties Dewey County, OK, Garfield County, OK

The radar

The Vance AFB radar (KVNX), 67 km from the middle of the area, began a volume at 22:04 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 12:00Z, 10.0 hours before the alert went out and 90 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: 555 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 224 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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 Aug 25, 1:38 PM CDT, 3 hours 23 minutes earlier.

Area forecast discussion, Aug 25, 1:38 PM CDT, 3 hours 23 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
138 PM CDT SAT AUG 25 2012

.AVIATION DISCUSSION...
RAIN AND THUNDERSTORMS ARE EXPECTED TO FORM OR MOVE INTO NORTHERN
OKLAHOMA THIS AFTERNOON AND SLWOLY SPREAD SOUTHEAST OVERNIGHT. A
WEAK FRONT WILL FOLLOW AND SHIFT WINDS TO THE NORTH OR NORTHEAST,
ALTHOUGHT NOT VERY STRONG.

.DISCUSSION...
MOST MODELS INDICATE NOW THAT SHOWERS AND THUNDERSTORMS WILL
CONTINUE TO FORM IN SOUTHERN KANSAS AND NORTHERN OKLAHOMA THIS
AFTERNOON AND DRIFT SLOWLY SOUTHEAST. THE CYCLONIC CIRCULATION
OVER CENTRAL KANSAS IS EXPECTED TO SLOWLY EVOLVE INTO A WEAK OPEN
WAVE AND DRIFT ACROSS OKLAHOMA DURING THE FIRST HALF OF SUNDAY. A
WEAK SURFACE TROUGH WILL BE ASSOCIATED AND TURN WINDS TO THE
NORTH. BECAUSE THIS SYSTEM WILL MOVE SLOWLY AND BECAUSE THE
ATMOSPHERE IS VERY MOIST, HEAVY RAINFALL IS EXPECTED IN SOME PARTS
OF NORTHERN OKLAHOMA. RAIN MAY BECOME MORE IN THE FORM OF SHOWERS
WITH THUNDERSTORMS ACROSS CENTRAL AND SOUTHEAST OKLAHOAM LATE
TODAY AND EARLY SUNDAY. ONCE THIS SYSTEM EXITS SOUTHEAST OKLAHOMA
LATE SUNDAY, CHANCES FOR RAIN RETURN TO NEAR ZERO FOR THE REST OF
THE HOT AND HUMID WEEK. AN UPPER RIDGE IS EPXECTED TO BUILD
NORTHWEST OF OKLAHOMA GIVING LITTLE DAY-TO-DAY CHANGE.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  71  88  69  89 /  60  60  20  20
HOBART OK         70  90  69  92 /  60  40  20  10
WICHITA FALLS TX  74  92  70  93 /  40  50  30  20
GAGE OK           67  87  67  90 /  50  20  10  10
PONCA CITY OK     69  85  68  89 /  70  50  20  10
DURANT OK         73  90  70  90 /  40  50  30  30

&&

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

06/09

Hazardous weather outlook, Aug 25, 11:40 AM CDT, 5 hours 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1140 AM CDT SAT AUG 25 2012

OKZ004>048-050>052-TXZ083>090-261000-
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-
1140 AM CDT SAT AUG 25 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
A FEW STRONG TO MARGINALLY SEVERE THUNDERSTORMS ARE POSSIBLE
LATE THIS AFTERNOON AND THIS EVENING.

DISCUSSION...
A MID AND UPPER LEVEL TROUGH WILL MOVE SLOWLY EAST AND SOUTHEAST
ACROSS THE CENTRAL AND SOUTHERN PLAINS THROUGH SUNDAY.  SCATTERED
TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP
DURING THE AFTERNOON AND EVENING...ESPECIALLY ACROSS WESTERN
AND NORTHERN OKLAHOMA.  A SURFACE TROUGH MAY ALSO AID IN THE
DEVELOPMENT OF STORMS ACROSS THE OKLAHOMA AND TEXAS PANHANDLES.

WEAK TO MODERATE INSTABILITY WILL DEVELOP AS TEMPERATURES WARM
INTO THE UPPER 80S AND 90S THIS AFTERNOON.  THIS WILL SUPPORT
A FEW STRONG TO MARGINALLY SEVERE STORMS...THROUGH THE EARLY
EVENING.

STRONG WIND GUSTS NEAR 60 MPH...TORRENTIAL RAINFALL...AND
FREQUENTLY LIGHTNING MAY OCCUR WITH THE STRONGER STORMS.
THE BEST CHANCE FOR STRONG TO SEVERE STORMS WILL BE ACROSS THE
WESTERN THIRD OF OKLAHOMA.

SHOWERS AND THUNDERSTORMS WILL LIKELY CONTINUE THROUGH THE OVERNIGHT
HOURS WITH BETTER CHANCES FOR RAIN SHIFTING INTO CENTRAL AND EASTERN
OKLAHOMA BY EARLY SUNDAY.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY AUG 26
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...30 PERCENT.

OTHER HAZARDOUS WEATHER...
HEAVY RAINFALL COULD LEAD TO MINOR FLOODING OF POORLY DRAINED AND
LOW-LYING AREAS IN ISOLATED LOCATIONS THROUGH TONIGHT...ESPECIALLY
OVER NORTHERN OKLAHOMA.

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

THUNDERSTORM OUTLOOK...
THUNDERSTORM CHANCES WILL CONTINUE ACROSS THE ENTIRE AREA ON SUNDAY
AND SOUTH OF I-44 ON MONDAY DUE TO ABUNDANT MOISTURE...INSTABILITY...
AND LIFT FROM THE NEARBY LOW PRESSURE DISTURBANCE. WIDESPREAD SEVERE
WEATHER IS NOT EXPECTED...THOUGH A FEW STORMS MAY BE STRONG TO SEVERE.

OTHER HAZARDOUS WEATHER...
HEAVY RAINFALL IS POSSIBLE ON SUNDAY...PARTICULARLY OVER NORTHERN
OKLAHOMA...WHICH COULD LEAD TO MINOR FLOODING OF POORLY DRAINED AND
LOW-LYING AREAS IN ISOLATED LOCATIONS.

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

In the hours before

Special weather statement, Aug 25, 3:34 PM CDT, 1 hour 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
334 PM CDT SAT AUG 25 2012

OKZ007-008-252100-
GRANT OK-KAY OK-
334 PM CDT SAT AUG 25 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GRANT AND
NORTHWESTERN KAY COUNTIES UNTIL 400 PM CDT...

AT 330 PM CDT...A SMALL CLUSTER OF STRONG THUNDERSTORMS WAS LOCATED
OVER NORTHEAST GRANT AND NORTHERN KAY COUNTIES.  THE
PRECIPITATION WAS MOVING NORTHEAST AT 15 TO 25 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

LOCATIONS IMPACTED INCLUDE...
MEDFORD...BRAMAN...DEER CREEK...NARDIN...RENFROW AND CHILOCCO.

LAT...LON 3669 9771 3670 9773 3700 9779 3700 9688
TIME...MOT...LOC 2030Z 233DEG 14KT 3692 9730

BT

Special weather statement, Aug 25, 4:24 PM CDT, 37 minutes before

SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 424 PM
CDT SAT AUG 25 2012

OKZ023-035-037-038-252200-
KIOWA OK-CADDO OK-TILLMAN OK-COMANCHE OK-
424 PM CDT SAT AUG 25 2012

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN KIOWA...SOUTHERN CADDO...
NORTHEASTERN TILLMAN AND COMANCHE COUNTIES UNTIL 500 PM CDT...

AT 423 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR MEERS...
MOVING NORTHEAST AT 20 MPH.

HAZARDS INCLUDE...
POTENTIALLY SEVERE WINDS GUSTING OVER 55 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...
FREQUENT CLOUD TO GROUND LIGHTNING...

LOCATIONS IMPACTED INCLUDE...
LAWTON...ANADARKO...CACHE...APACHE...ELGIN...CYRIL...FLETCHER...
STERLING...CEMENT...INDIAHOMA...MEDICINE PARK...BOONE...LAKE
CHICKASHA...FORT SILL...MEERS...LAKE ELLSWORTH...STECKER AND LAKE
LAWTONKA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3487 9883 3523 9811 3471 9809 3437 9882
TIME...MOT...LOC 2123Z 232DEG 19KT 3475 9858

Special weather statement, Aug 25, 4:36 PM CDT, 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
436 PM CDT SAT AUG 25 2012

OKZ011-012-015>018-252200-
CUSTER OK-BLAINE OK-KINGFISHER OK-DEWEY OK-GARFIELD OK-MAJOR OK-
436 PM CDT SAT AUG 25 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CUSTER...NORTHERN
BLAINE...NORTHWESTERN KINGFISHER...SOUTHEASTERN DEWEY...WESTERN
GARFIELD AND EASTERN MAJOR COUNTIES UNTIL 500 PM CDT...

AT 431 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM 4 MILES SOUTHWEST OF DRUMMOND TO CANTON TO 5 MILES SOUTHWEST
OF PUTNAM...MOVING NORTHEAST AT 20 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

LOCATIONS IMPACTED INCLUDE...
ENID...OKEENE...CANTON...LAHOMA...CANTON LAKE...VANCE AIR FORCE BASE
AND ISABELLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3640 9756 3606 9815 3568 9892 3583 9928
      3613 9867 3655 9793
TIME...MOT...LOC 2131Z 242DEG 19KT 3625 9810 3604 9855 3582 9906

11

Local storm report, Aug 25, 4:37 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
437 PM CDT SAT AUG 25 2012

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

0425 PM     TSTM WND GST     3 W MEDICINE PARK       34.73N 98.55W
08/25/2012  M60 MPH          COMANCHE           OK   MESONET

&&

FM

Special weather statement, Aug 25, 4:57 PM CDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
457 PM CDT SAT AUG 25 2012

TXZ088-252230-
BAYLOR TX-
457 PM CDT SAT AUG 25 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BAYLOR COUNTY
UNTIL 530 PM CDT...

AT 456 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR RED SPRINGS...
MOVING NORTH AT 15 MPH.

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

LOCATIONS IMPACTED INCLUDE...
SEYMOUR...BOMARTON...MABELLE AND RED SPRINGS.

LAT...LON 3347 9945 3365 9946 3371 9906 3344 9904
TIME...MOT...LOC 2156Z 201DEG 12KT 3357 9937

11

Special weather statement, Aug 25, 5:01 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
501 PM CDT SAT AUG 25 2012

OKZ011-012-015>018-252230-
CUSTER OK-BLAINE OK-KINGFISHER OK-DEWEY OK-GARFIELD OK-MAJOR OK-
501 PM CDT SAT AUG 25 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN CUSTER...NORTHERN
BLAINE...NORTHWESTERN KINGFISHER...SOUTHEASTERN DEWEY...
SOUTHWESTERN GARFIELD AND SOUTHEASTERN MAJOR COUNTIES UNTIL 530 PM
CDT...

AT 459 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM VANCE AIR FORCE BASE TO CANTON TO 10 MILES WEST OF PUTNAM...
MOVING EAST-NORTHEAST AT 15 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 40 MPH...

LOCATIONS IMPACTED INCLUDE...
ENID...OKEENE...CANTON...TALOGA...BRECKENRIDGE...PUTNAM... CANTON
LAKE...VANCE AIR FORCE BASE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE WEATHER IS NOT EXPECTED AND NO WARNINGS ARE ANTICIPATED AT
THIS TIME.

&&

LAT...LON 3642 9750 3601 9810 3570 9914 3594 9929
      3614 9865 3645 9790
TIME...MOT...LOC 2159Z 252DEG 12KT 3636 9790 3608 9857 3582 9915

11

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 9:38 PM CDT	Special Weather Statement	OUN	Harper	52 min
Aug 25, 1:23 AM CDT	Special Weather Statement	OUN	Harper	37 min
Aug 25, 2:53 PM CDT	Special Weather Statement	OUN	Garfield, Grant, Kay	37 min
Aug 25, 3:16 PM CDT	Special Weather Statement	OUN	Major	29 min
Aug 25, 3:34 PM CDT	Special Weather Statement	OUN	Kay	26 min
Aug 25, 3:39 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	50 min
Aug 25, 4:24 PM CDT	Special Weather Statement	OUN	Comanche	36 min
Aug 25, 4:33 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche	42 min
Aug 25, 4:36 PM CDT	Special Weather Statement	OUN	Garfield	24 min
Aug 25, 4:55 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	50 min
Aug 25, 5:22 PM CDT	Special Weather Statement	OUN	Grady	38 min
Aug 25, 5:27 PM CDT	Special Weather Statement	OUN	Dewey, Garfield	33 min
Aug 25, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	39 min
Aug 25, 5:59 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble, Payne	46 min
Aug 25, 6:17 PM CDT	Special Weather Statement	OUN	Custer, Roger Mills	28 min
Aug 25, 6:22 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	38 min
Aug 25, 6:28 PM CDT	Special Weather Statement	OUN	Harmon	32 min
Aug 25, 6:36 PM CDT	Special Weather Statement	OUN	Oklahoma	24 min
Aug 25, 6:54 PM CDT	Special Weather Statement	OUN	Lincoln, Oklahoma	36 min
Aug 25, 4:57 PM CDT	Special Weather Statement	OUN	Baylor	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.