Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Norman, OK

August 7, 2011Ellis County, Woodward County, Oklahoma

NWS Norman, OK issued this special weather statement at Aug 7, 2011, 2:02 PM CDT for Ellis County, Woodward County, Oklahoma. It was in force for 28 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 7, 2011, 2:02 PM CDT (19:02 UTC)
Expired: Aug 7, 2011, 2:30 PM CDT
In force: 28 min
Issued by: NWS Norman, OK

Counties Ellis County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 134 km from the middle of the area, began a volume at 19:02 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

Dodge City, (KDDC), launched 12:00Z, 7.0 hours before the alert went out and 168 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: 729 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 2262 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 29 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 Norman, OK wrote its last area forecast discussion before this special weather statement went out at Aug 7, 11:18 AM CDT, 2 hours 44 minutes earlier.

Area forecast discussion, Aug 7, 11:18 AM CDT, 2 hours 44 minutes before

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Hazardous weather outlook, Aug 7, 12:06 PM CDT, 1 hour 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1206 PM CDT SUN AUG 7 2011

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-
1206 PM CDT SUN AUG 7 2011

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

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

THUNDERSTORM OUTLOOK...
ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS
AFTERNOON. WIDESPREAD SEVERE WEATHER IS NOT EXPECTED.

DISCUSSION...
THUNDERSTORMS OVER CENTRAL OKLAHOMA HAVE WEAKENED SOMEWHAT AS THEY
MOVED EAST OF INTERSTATE 35. HOWEVER.. NEW DEVELOPMENT HAS OCCURRED
OVER WEST-CENTRAL OKLAHOMA UNDERNEATH A BAND OF MID LEVEL MOISTURE
THAT STRETCHES INTO NORTHERN MEXICO. LATER INTO THE AFTERNOON...
DIFFERENTIAL HEATING ASSOCIATED WITH THE CLOUD COVER... COMBINED
WITH WEAK INSTABILITY MAY YIELD ADDITIONAL THUNDERSTORMS. DAMAGING
WIND GUSTS WILL BE POSSIBLE IN THIS ENVIRONMENT CHARACTERIZED BY HOT
AND DRY AIR BELOW CLOUD BASE.

A THUNDERSTORM COMPLEX MOVING ACROSS KANSAS OVERNIGHT MAY SEND AN
OUTFLOW BOUNDARY INTO NORTHERN OKLAHOMA. THUNDERSTORMS COULD DEVELOP
IN ASSOCIATION WITH THIS BOUNDARY...ALTHOUGH SEVERE STORMS WOULD BE
UNLIKELY.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY AUG 8.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...80 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...30 PERCENT.

OTHER HAZARDOUS WEATHER...
DANGEROUS HEAT WILL PERSIST ACROSS THE REGION. PLEASE REFER TO THE
EXCESSIVE HEAT WARNING FOR DETAILS.

HOT AND DRY CONDITIONS...ALONG WITH DRY VEGETATION... WILL KEEP
WILDFIRE POTENTIAL HIGH THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
AFTERNOON AND EVENING THUNDERSTORMS WILL BE POSSIBLE ON MONDAY ALONG
AND AHEAD OF A COLD FRONT MOVING INTO NORTHWEST OKLAHOMA.
THUNDERSTORM COMPLEXES FORMING ON THE HIGH PLAINS MAY MOVE OVER
PORTIONS OF THE AREA FROM TUESDAY THROUGH SATURDAY... MAINLY DURING
THE OVERNIGHT AND EARLY MORNING HOURS.

OTHER HAZARDOUS WEATHER...
THE EXCESSIVE HEAT WARNING CONTINUES THROUGH AT LEAST MONDAY AS VERY
HOT WEATHER WILL PERSIST. MODERATE SOUTH TO SOUTHWEST WINDS MAY
DEVELOP ON MONDAY. THESE MODERATE WINDS.. ALONG WITH HOT WEATHER AND
DRY VEGETATION... WILL ELEVATE WILDFIRE CONCERNS ON MONDAY.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM
MONDAY.

In the hours before

Special weather statement, Aug 7, 2:02 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
202 PM CDT SUN AUG 7 2011

OKZ009-010-015-071930-
DEWEY OK-ELLIS OK-WOODWARD OK-
202 PM CDT SUN AUG 7 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR DEWEY...ELLIS AND WOODWARD
COUNTIES.

AT 202 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 3
MILES NORTHEAST OF VICI TO 8 MILES SOUTHWEST OF ARNETT...MOVING EAST
AT 15 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING WHICH MAY CAUSE WILDFIRES...

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

LAT...LON 3640 9998 3646 9896 3642 9896 3607 9922
      3599 10001

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 7:00 PM CDT	Special Weather Statement	OUN	Kingfisher	45 min
Aug 6, 7:13 PM CDT	Special Weather Statement	OUN	Alfalfa, Garfield	32 min
Aug 6, 7:25 PM CDT	Special Weather Statement	OUN	Garfield, Grant	35 min
Aug 6, 7:32 PM CDT	Special Weather Statement	OUN	Oklahoma	28 min
Aug 6, 7:34 PM CDT	Special Weather Statement	OUN	Garfield	26 min
Aug 6, 7:55 PM CDT	Special Weather Statement	OUN	Logan, Oklahoma	20 min
Aug 6, 7:58 PM CDT	Special Weather Statement	OUN	Noble, Payne	17 min
Aug 6, 8:06 PM CDT	Special Weather Statement	OUN	Garvin, Pottawatomie, Seminole	24 min
Aug 6, 8:18 PM CDT	Special Weather Statement	OUN	Oklahoma	12 min
Aug 6, 8:21 PM CDT	Special Weather Statement	OUN	Noble, Payne	24 min
Aug 7, 1:53 AM CDT	Special Weather Statement	OUN	Washita	22 min
Aug 7, 2:23 PM CDT	Heat Advisory	OUN	Atoka, Beckham, Bryan, Caddo, Canadian, Carter and 28 more	5 days
Aug 7, 2:26 PM CDT	Special Weather Statement	OUN	Ellis	34 min
Aug 7, 2:58 PM CDT	Special Weather Statement	OUN	Ellis	32 min
Aug 7, 3:25 PM CDT	Special Weather Statement	OUN	Ellis	35 min
Aug 7, 3:55 PM CDT	Special Weather Statement	OUN	Roger Mills	20 min
Aug 7, 4:28 PM CDT	Special Weather Statement	OUN	Roger Mills	17 min
Aug 7, 4:47 PM CDT	Special Weather Statement	OUN	Roger Mills	13 min
Aug 7, 4:54 PM CDT	Special Weather Statement	OUN	Woods	21 min
Aug 7, 5:01 PM CDT	Special Weather Statement	OUN	Roger Mills	29 min
Aug 7, 5:03 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	42 min
Aug 7, 5:33 PM CDT	Special Weather Statement	OUN	Roger Mills	12 min
Aug 7, 5:50 PM CDT	Special Weather Statement	OUN	Beckham	25 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.