Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Norman, OK

August 6, 20117 counties in Oklahoma

NWS Norman, OK issued this special weather statement at Aug 6, 2011, 3:43 PM CDT for 7 counties in Oklahoma. It was in force for 17 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 6, 2011, 3:43 PM CDT (20:43 UTC)
Expired: Aug 6, 2011, 4:00 PM CDT
In force: 17 min
Issued by: NWS Norman, OK

Counties Blaine County, OK, Canadian County, OK, Custer County, OK, Kingfisher County, OK, Logan County, OK, Oklahoma County, OK, Washita County, OK

The radar

The Norman radar (KTLX), 75 km from the middle of the area, began a volume at 20:44 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 12:00Z, 8.7 hours before the alert went out and 73 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: 64 J/kg
Mixed-layer CIN: -437 J/kg
Mixed-layer LCL: 2284 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 13 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 6, 1:25 PM CDT, 2 hours 18 minutes earlier.

Area forecast discussion, Aug 6, 1:25 PM CDT, 2 hours 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
125 PM CDT SAT AUG 6 2011

.DISCUSSION...
THE SINGLE MODULATION TO THE EXCESSIVE HEAT IS IN NORTHERN
OKALHOMA TODAY TO THE NORTH OF AN OUTFLOW BOUNDARY AND IN A ZONE
OF ISOLATED SHOWERS. THESE SMALL SHOWERS ARE EXPECTED THROUGH THE
EVENING IN ISOLATED FASHION NORTH OF I-40 WHERE TEMPERATURES WILL
BE LOWER TONIGHT. ON SUNDAY THIS BOUNDARY IS EXPECTED TO DISSIPATE
WHILE IT MOVES NORTH, BUT FURTHER SHOWERS AND THUNDERSTORMS IN
KANSAS MAY KEEP IT NEAR NORTHERN OKALHOMA TOMORROW AS WELL.
OTHERWISE, INCREASING MID-LEVEL WINDS WITH THE APPROACH OF A
PRESSURE TROUGH IN THE CENTRAL PLAINS WILL CAUSE HIGHER WINDS
SUNDAY NIGHT AND MONDAY. A FIRE WEATHER WATCH IS EFFECTIVE MONDAY
IN MUCH OF WESTERN AND CENTRAL OKLAHOMA. BEYOND MONDAY, A WEAK
NORTHWEST FLOW PATTER IS EXPECTED ACROSS NORTHERN OKLAHOMA. THIS
WILL KEEP A CHANCE FOR RAIN THERE. AREAS IN THE SOUTH OF OKLAHOMA
ARE NOT EXPECTED TO SEE ANY RAINFALL THROUGH NEXT WEEK AND THE
HEAT WILL STAY IN PLACE.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  78 108  78 109 /  20  20  10  10
HOBART OK         80 108  81 111 /  20  20  10  10
WICHITA FALLS TX  83 109  84 111 /  10  10   0   0
GAGE OK           75 105  77 104 /  30  20  20  10
PONCA CITY OK     79 106  82 107 /  30  20  20  20
DURANT OK         83 107  82 109 /  10  10   0   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...EXCESSIVE HEAT WARNING UNTIL 10 PM CDT MONDAY FOR OKZ004>048-
     050>052.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH MONDAY EVENING
     FOR OKZ005>029-033>038.

TX...EXCESSIVE HEAT WARNING UNTIL 10 PM CDT MONDAY FOR TXZ083>090.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH MONDAY EVENING
     FOR TXZ083>085.

&&

08/09

Hazardous weather outlook, Aug 6, 12:08 PM CDT, 3 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1208 PM CDT SAT AUG 6 2011

OKZ004>048-050>052-TXZ083>090-071100-
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-
1208 PM CDT SAT AUG 6 2011

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

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

THUNDERSTORM OUTLOOK...
THUNDERSTORMS WILL BE POSSIBLE NEAR AN OUTFLOW BOUNDARY THIS
AFTERNOON AND MAY PERSIST INTO THIS EVENING. SOME STORMS COULD
PRODUCE DAMAGING WIND GUSTS OR EVEN MARGINALLY SEVERE HAIL.

DISCUSSION...
AN OUTFLOW BOUNDARY LEFT OVER BY EARLY MORNING THUNDERSTORMS HAS
SLOWLY BEGUN LIFTING NORTH... AND SHOULD LIE SOMEWHERE OVER THE
NORTHERN HALF TO THIRD OF OKLAHOMA BY MID AFTERNOON. STRONG SURFACE
HEATING MAY ALLOW FOR ISOLATED THUNDERSTORMS TO DEVELOP NEAR AND
NORTH OF THE BOUNDARY. AS HAS BEEN THE CASE FOR MANY DAYS... HOT AND
DRY AIR BELOW CLOUD BASE WILL MEAN THAT ANY THUNDERSTORM COULD CARRY
THE THREAT OF AT LEAST ISOLATED DAMAGING WIND GUSTS... WITH A
SMALLER THREAT FOR MARGINALLY SEVERE HAIL.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY AUG 7.
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 CONTINUE. AN EXCESSIVE HEAT WARNING IS IN
EFFECT. PLEASE REFER TO THE LATEST VERSION OF THIS PRODUCT FOR MORE
INFORMATION.

BREEZY SOUTHWEST WINDS IN SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS
WILL KEEP WILDFIRE POTENTIAL HIGH AS HOT AND DRY WEATHER PERSISTS.

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

THUNDERSTORM OUTLOOK...
THROUGH MONDAY... THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON AS A
FRONTAL BOUNDARY ENHANCED BY OUTFLOW AT TIMES REMAINS IN THE AREA.
FROM TUESDAY THROUGH FRIDAY... OVERNIGHT THUNDERSTORM COMPLEXES MAY
MOVE OVER PORTIONS OF NORTHERN AND CENTRAL OKLAHOMA.

OTHER HAZARDOUS WEATHER...
MODERATE SOUTH TO SOUTHWEST WINDS ARE EXPECTED TO DEVELOP OVER THE
WEEKEND INTO EARLY NEXT WEEK. THESE MODERATE WINDS.. ALONG WITH HOT
WEATHER WITH LITTLE RAINFALL... WILL ELEVATE WILDFIRE CONCERNS
SUNDAY AND MONDAY.

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

In the hours before

Special weather statement, Aug 6, 3:05 PM CDT, 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
305 PM CDT SAT AUG 6 2011

OKZ014-021-062030-
ROGER MILLS OK-BECKHAM OK-
305 PM CDT SAT AUG 6 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR BECKHAM AND ROGER MILLS
COUNTIES.

AT 304 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER
SWEETWATER...MOVING NORTHEAST AT 15 MPH. ANOTHER STRONG THUNDERSTORM
WAS LOCATED 5 MILES SOUTHWEST OF CHEYENNE. ALSO MOVING NORTHEAST AT
15 PH.

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

LAT...LON 3572 9970 3551 9950 3524 9999 3548 10001

Special weather statement, Aug 6, 3:35 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
335 PM CDT SAT AUG 6 2011

OKZ014-021-062100-
ROGER MILLS OK-BECKHAM OK-
335 PM CDT SAT AUG 6 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR BECKHAM AND ROGER MILLS
COUNTIES.

AT 334 PM CDT...SCATTERED STRONG THUNDERSTORMS EXTENDING FROM 5
MILES EAST OF DEMPSEY TO 18 MILES WEST OF SWEETWATER WERE MOVING
NORTHEAST AT 20 MPH. STRONG TO DAMAGING WIND GUSTS AND FIRE STARTING
LIGHTNING ARE LIKELY.

HAZARDS INCLUDE...
FREQUENT CLOUD TO GROUND LIGHTNING...
WIND GUSTS TO 50 TO 60 MPH...

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

LAT...LON 3559 10001 3561 10000 3575 9940 3538 9940
      3523 10001

Special weather statement, Aug 6, 3:43 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
343 PM CDT SAT AUG 6 2011

OKZ015>020-022>025-062100-
BLAINE OK-CADDO OK-CANADIAN OK-CUSTER OK-DEWEY OK-KINGFISHER OK-
LOGAN OK-OKLAHOMA OK-PAYNE OK-WASHITA OK-
343 PM CDT SAT AUG 6 2011

...SIGNIFICANT WEATHER ADVISORY...
THIS SIGNIFICANT WEATHER ADVISORY IS FOR BLAINE...CADDO...CANADIAN...
CUSTER...DEWEY...KINGFISHER...LOGAN...OKLAHOMA...PAYNE AND WASHITA
COUNTIES.

AT 340 PM CDT...SCATTERED SHOWERS AND THUNDERSTORMS EXTENDING FROM
NEAR ELK CITY TO WEATHERFORD AND WATONGA...TO NEAR FAR NORTHERN
PORTIONS OF THE OKLAHOMA CITY METRO UP TOWARD MULHALL. THE SHOWERS
AND STORMS WERE MOVING NORTHEAST AT 25 MPH. VIRTUALLY ALL OF THE
SHOWERS AND STORMS WILL BE CAPABLE OF PRODUCING 40 TO 50 MPH WIND
GUSTS. ISOLATED AREAS OF DAMAGING WIND GUSTS MAY ALSO OCCUR...SO IF
YOU ARE OUTDOORS...SEEK SHELTER IF YOU HEAR THUNDER OR SEE A SHOWER
OR STORM APPROACH.

HAZARDS INCLUDE...
WIND GUSTS IN EXCESS OF 50 MPH...

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

LAT...LON 3557 9722 3525 9920 3582 9922 3609 9714

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 7:16 PM CDT	Special Weather Statement	OUN	Kay	14 min
Aug 5, 7:27 PM CDT	Special Weather Statement	OUN	Garfield	18 min
Aug 5, 7:40 PM CDT	Special Weather Statement	OUN	Grant	20 min
Aug 5, 7:41 PM CDT	Special Weather Statement	OUN	Kay	19 min
Aug 5, 7:42 PM CDT	Special Weather Statement	OUN	Ellis	18 min
Aug 5, 7:59 PM CDT	Severe Thunderstorm Warning	OUN	Grant	30 min
Aug 5, 10:33 PM CDT	Special Weather Statement	OUN	Ellis	12 min
Aug 5, 10:44 PM CDT	Special Weather Statement	OUN	Ellis, Roger Mills	31 min
Aug 5, 11:09 PM CDT	Special Weather Statement	OUN	Harper	36 min
Aug 5, 11:46 PM CDT	Special Weather Statement	OUN	Ellis, Harper, Roger Mills, Woodward	44 min
Aug 6, 12:22 AM CDT	Special Weather Statement	OUN	Woods	8 min
Aug 6, 12:31 AM CDT	Special Weather Statement	OUN	Dewey, Harper, Woods, Woodward	29 min
Aug 6, 1:02 AM CDT	Special Weather Statement	OUN	Alfalfa, Major, Woods	28 min
Aug 6, 1:29 AM CDT	Special Weather Statement	OUN	Garfield, Grant	31 min
Aug 6, 1:54 AM CDT	Special Weather Statement	OUN	Alfalfa, Grant, Kay, Woods	36 min
Aug 6, 2:21 PM CDT	Fire Weather Watch	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 30 more	38 hr
Aug 6, 3:05 PM CDT	Special Weather Statement	OUN	Beckham	25 min
Aug 6, 3:35 PM CDT	Special Weather Statement	OUN	Beckham	25 min
Aug 6, 4:04 PM CDT	Special Weather Statement	OUN	Canadian, Lincoln, Logan, Payne	26 min
Aug 6, 4:09 PM CDT	Special Weather Statement	OUN	Roger Mills	36 min
Aug 6, 4:37 PM CDT	Special Weather Statement	OUN	Blaine, Canadian, Custer, Kingfisher, Logan, Payne	23 min
Aug 6, 4:42 PM CDT	Special Weather Statement	OUN	Beckham, Greer, Roger Mills	33 min
Aug 6, 5:04 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	56 min
Aug 6, 5:11 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	64 min
Aug 6, 5:17 PM CDT	Special Weather Statement	OUN	Beckham, Caddo, Custer, Greer, Harmon, Washita	28 min
Aug 6, 5:26 PM CDT	Special Weather Statement	OUN	Oklahoma	9 min
Aug 6, 5:42 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Oklahoma, Pottawatomie	38 min
Aug 6, 5:49 PM CDT	Special Weather Statement	OUN	Blaine, Canadian	26 min
Aug 6, 6:37 PM CDT	Special Weather Statement	OUN	Blaine, Caddo, Canadian, Custer, Greer, Kingfisher and 6 more	8 min
Aug 6, 6:53 PM CDT	Special Weather Statement	OUN	Logan, Oklahoma	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.