Alert archive / Oklahoma / Special Weather Statements in 2013

Special Weather Statement, NWS Norman, OK

August 8, 2013Custer County, Roger Mills County, Oklahoma

NWS Norman, OK issued this special weather statement at Aug 8, 2013, 12:52 AM CDT for Custer County, Roger Mills County, Oklahoma. It was in force for 23 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 8, 2013, 12:52 AM CDT (05:52 UTC)
Expired: Aug 8, 2013, 1:15 AM CDT
In force: 23 min
Issued by: NWS Norman, OK

Counties Custer County, OK, Roger Mills County, OK

The radar

The Vance AFB radar (KVNX), 147 km from the middle of the area, began a volume at 05:55 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

Norman, OK (KOUN), launched 00:00Z, 5.9 hours before the alert went out and 180 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: 2838 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1509 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.3

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 7, 11:55 PM CDT, 57 minutes earlier.

Area forecast discussion, Aug 7, 11:55 PM CDT, 57 minutes before

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Hazardous weather outlook, Aug 7, 8:55 PM CDT, 3 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
855 PM CDT WED AUG 7 2013

OKZ004>048-050>052-TXZ083>090-081000-
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-
855 PM CDT WED AUG 7 2013

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A RISK OF SEVERE THUNDERSTORMS LATE THIS EVENING AND
OVERNIGHT ACROSS THE NORTHERN-HALF OF OKLAHOMA.

LOCATION...
THE RISK AREA COVERS LOCATIONS NORTH OF INTERSTATE-40.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE AFTER
10 PM.

IMPACTS...
THE MAIN CONCERN WITH ANY SEVERE THUNDERSTORM WILL BE DAMAGING
WIND GUSTS UP TO 70 MPH.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
THE RISK AREA SHOULD BE PREPARED FOR SEVERE WEATHER OPERATIONS
INTO THE OVERNIGHT HOURS.

DISCUSSION...
NUMEROUS STORMS OVER THE PANHANDLES ARE EXPECTED TO CONSOLIDATE
INTO ONE OR MORE CLUSTERS AND MOVE EASTWARD LATE THIS EVENING
AND OVERNIGHT. THE PRIMARY AREAS THAT COULD BE AFFECTED WILL BE
FAR NORTHWEST AND NORTH-CENTRAL OKLAHOMA...INCLUDING WOODWARD...
ALVA...ENID...AND PONCA CITY. HOWEVER...LOCATIONS FARTHER SOUTH
TOWARD THE INTERSTATE-40 CORRIDOR SHOULD NOT LET THEIR GUARD
DOWN. ALTHOUGH THE PRIMARY CONCERN WILL BE DAMAGING WIND GUSTS
ALONG THE LEADING EDGE OF STORMS...A FEW STORMS COULD ALSO
PRODUCE HAIL UP TO THE SIZE OF HALF DOLLARS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT THURSDAY AUG 8.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THUNDERSTORM OUTLOOK...
STORM CHANCES WILL CONTINUE ACROSS THE AREA THURSDAY INTO THE
WEEKEND AND THE EARLY PART OF NEXT WEEK AS A WEAK COLD FRONT REMAINS
IN THE AREA. THERE WILL BE A CHANCE FOR A FEW SEVERE THUNDERSTORMS
ON THURSDAY ACROSS OKLAHOMA AND WESTERN NORTH TEXAS AS SUFFICIENT
INSTABILITY WILL CONTINUE TO BE PRESENT. LARGE HAIL AND DAMAGING
WIND GUSTS WILL BE THE PRIMARY CONCERNS. HEAVY RAINFALL AND LOCALIZED
FLOODING WILL ALSO BE POSSIBLE.

OTHER HAZARDOUS WEATHER...
HOT CONDITIONS WILL CONTINUE THROUGH THURSDAY MAINLY ACROSS FAR
SOUTHERN OKLAHOMA AND ALL OF WESTERN NORTH TEXAS. PLEASE TAKE STEPS
TO PREVENT HEAT RELATED ILLNESSES.

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

In the hours before

Special weather statement, Aug 7, 11:18 PM CDT, 1 hour 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1118 PM CDT WED AUG 7 2013

OKZ004-009-080445-
HARPER OK-ELLIS OK-
1118 PM CDT WED AUG 7 2013

...SIGNIFICANT WEATHER ADVISORY FOR HARPER AND NORTHWESTERN ELLIS
COUNTIES UNTIL 1145 PM CDT...

AT 1113 PM CDT...SEVERE THUNDERSTORMS WERE MOVING ACROSS CENTRAL
BEAVER COUNTY TO THE WEST AND NORTHWEST OF SLAPOUT. THE STORMS WERE
MOVING EAST AT 55 MPH.

HAZARDS INCLUDE...
POTENTIALLY SEVERE WINDS GUSTING OVER 55 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE SITUATION CLOSELY. BE READY TO ACT QUICKLY IF A WARNING
IS ISSUED OR IF STORMS THREATEN YOU.

&&

LAT...LON 3700 9969 3683 9953 3681 9953 3645 9984
      3644 10000 3700 10000
TIME...MOT...LOC 0413Z 259DEG 49KT 3695 10043 3673 10024 3648 10044

..SPEG.

Special weather statement, Aug 7, 11:23 PM CDT, 1 hour 29 minutes before

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Special weather statement, Aug 8, 12:10 AM CDT, 42 minutes before

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Special weather statement, Aug 8, 12:32 AM CDT, 20 minutes before

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Local storm report, Aug 8, 12:37 AM CDT, 15 minutes before

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Special weather statement, Aug 8, 12:52 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 10:10 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	50 min
Aug 7, 10:50 PM CDT	Special Weather Statement	OUN	Greer, Tillman	25 min
Aug 7, 11:03 PM CDT	Special Weather Statement	OUN	Oklahoma	27 min
Aug 7, 11:18 PM CDT	Special Weather Statement	OUN	Harper	27 min
Aug 7, 11:23 PM CDT	Special Weather Statement	OUN	Beckham, Kiowa, Washita	37 min
Aug 7, 11:42 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	48 min
Aug 8, 12:10 AM CDT	Special Weather Statement	OUN	Caddo, Kiowa, Washita	35 min
Aug 8, 12:32 AM CDT	Special Weather Statement	OUN	Ellis, Harper	28 min
Aug 8, 12:56 AM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	49 min
Aug 8, 1:39 AM CDT	Special Weather Statement	OUN	Major	21 min
Aug 8, 2:02 AM CDT	Special Weather Statement	OUN	Alfalfa, Blaine, Kingfisher, Major, Woods	43 min
Aug 8, 2:12 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Grant, Major, Woods	48 min
Aug 8, 2:50 AM CDT	Areal Flood Advisory	OUN	Alfalfa, Woods	3 hr
Aug 8, 3:00 AM CDT	Severe Thunderstorm Warning	OUN	Grant	45 min
Aug 8, 3:23 AM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	52 min
Aug 8, 11:46 AM CDT	River Flood Warning	OUN	Major, Woods, Woodward	10 hr
Aug 8, 3:38 PM CDT	Flood Watch	OUN	Alfalfa, Garfield, Grant, Harper, Kay, Major and 3 more	21 hr
Aug 8, 4:45 PM CDT	Special Weather Statement	OUN	Cotton	15 min
Aug 8, 5:02 PM CDT	Special Weather Statement	OUN	Cotton	28 min
Aug 8, 5:23 PM CDT	Special Weather Statement	OUN	Cotton	22 min
Aug 8, 5:51 PM CDT	Special Weather Statement	OUN	Cotton	24 min
Aug 8, 6:14 PM CDT	Special Weather Statement	OUN	Harper	31 min
Aug 8, 6:20 PM CDT	Special Weather Statement	OUN	Cotton	25 min
Aug 8, 6:37 PM CDT	Special Weather Statement	OUN	Kiowa	23 min
Aug 8, 6:53 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	52 min
Aug 8, 3:40 PM CDT	Special Weather Statement	OUN	Baylor	35 min
Aug 8, 4:10 PM CDT	Special Weather Statement	OUN	Baylor	20 min
Aug 8, 4:17 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	43 min
Aug 8, 5:53 PM CDT	Special Weather Statement	OUN	Hardeman	22 min
Aug 8, 5:56 PM CDT	Special Weather Statement	OUN	Baylor	19 min
Aug 8, 6:11 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	49 min
Aug 8, 6:31 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Knox	59 min
Aug 8, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Wilbarger	48 min

Nearby

Special Weather Statements in Oklahoma, 2013 Every special weather statement in 2013

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.