Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 466, NWS Norman, OK

August 3, 2011Dewey County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 3, 2011, 6:37 PM CDT for Dewey County, Woodward County, Oklahoma. It was in force for 38 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 3, 2011, 6:37 PM CDT (23:37 UTC)
Expired: Aug 3, 2011, 7:15 PM CDT
In force: 38 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Dewey County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 104 km from the middle of the area, began a volume at 23:39 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.

What was reported inside it

Time	Report	Where	Remark
Aug 3, 6:53 PM CDT	TSTM WND GST 72	1 E Mooreland, OK	CORRECTED LSR FOR LOCATION... PEA SIZE HAIL WAS ALSO REPORTED.
Aug 3, 7:01 PM CDT	TSTM WND GST 81	2 E Mooreland, OK	PEA SIZED HAIL ALSO REPORTED

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 16 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 11.6 hours before the alert went out and 150 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2683 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 26 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.

058 
WUUS54 KOUN 032337
SVROUN
OKC043-153-040015-
/O.NEW.KOUN.SV.W.0466.110803T2337Z-110804T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
637 PM CDT WED AUG 3 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DEWEY COUNTY IN NORTHWEST OKLAHOMA...
  WOODWARD COUNTY IN NORTHWEST OKLAHOMA...

* UNTIL 715 PM CDT

* AT 636 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED SEVERE
  THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES SOUTH OF WOODWARD
  TO 4 MILES SOUTHWEST OF MUTUAL... WITH ANOTHER STRONG TO SEVERE 
  THUNDERSTORM 3 MILES NORTHWEST OF PUTNAM. THE STORMS WERE MOVING
  NORTHEAST AT 10 MPH. WINDS OF 60 MPH HAVE BEEN REPORTED JUST
  SOUTHWEST OF WOODWARD.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
WIND GUSTS TO 65 MPH...

* LOCATIONS IN THE WARNING INCLUDE CESTOS...MOORELAND...MUTUAL...
  PUTNAM...SEILING...SHARON...TALOGA...VICI AND WOODWARD.

LAT...LON 3623 9895 3617 9895 3616 9889 3599 9874
      3581 9895 3581 9903 3638 9952 3659 9946
      3660 9929
TIME...MOT...LOC 2336Z 213DEG 8KT 3639 9939 3619 9921
          3589 9900

$$


..SPEG.

1 follow-up statement

856 
WWUS54 KOUN 040001
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
701 PM CDT WED AUG 3 2011

OKC043-153-040015-
/O.CON.KOUN.SV.W.0466.000000T0000Z-110804T0015Z/
DEWEY OK-WOODWARD OK-
701 PM CDT WED AUG 3 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR WOODWARD AND CENTRAL DEWEY COUNTIES...

AT 659 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED SEVERE 
THUNDERSTORMS NEAR MOORELAND... MOVING EAST-NORTHEAST AT 10 MPH. 
THIS STORM HAS PRODUCED WINDS GUSTS UP TO 72 MPH NEAR MOORELAND. 
ANOTHER STORM WAS LOCATED JUST SOUTH OF TALOGA. ALTHOUGH THE STORM 
NEAR TALOGA IS WEAKENING... IT WILL STILL BE CAPABLE OF PRODUCING 
WINDS TO 60 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
DAMAGING WIND GUSTS TO 80 MPH...

* LOCATIONS IN THE WARNING INCLUDE CESTOS...MOORELAND...MUTUAL...
  PUTNAM...SEILING...SHARON...TALOGA...VICI AND WOODWARD.

LAT...LON 3623 9895 3617 9895 3616 9889 3599 9874
      3581 9895 3581 9903 3638 9952 3659 9946
      3660 9929
TIME...MOT...LOC 2359Z 213DEG 8KT 3643 9921 3597 9897

$$


..SPEG.

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 3, 6:24 PM CDT, 13 minutes earlier.

Area forecast discussion, Aug 3, 6:24 PM CDT, 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
624 PM CDT WED AUG 3 2011

.AVIATION...
SCATTERED THUNDERSTORMS OVER ABOUT THE NORTHERN THIRD OF OK
WILL DIMINISH THROUGH 03Z AS THEY CONTINUE TO MOVE TO THE NORTH
INTO KS. ELSEWHERE... ISOLATED STORMS WILL ALSO BE POSSIBLE
THROUGH MID EVENING NEAR AN OUTFLOW BOUNDARY THAT EXTENDED FROM
SOUTH OF THE OKC METRO AREA INTO WEST CENTRAL OK. ADDITIONAL
SCATTERED SHOWERS AND STORMS MAY MOVE BACK INTO PARTS OF FAR
NORTHERN OK LATE TONIGHT. A FEW SHOWERS AND STORMS WILL AGAIN BE
POSSIBLE THURSDAY AFTERNOON NEAR A WEAK FRONT ACROSS NORTHERN OK.

&&

.PREV DISCUSSION... /ISSUED 339 PM CDT WED AUG 3 2011/

DISCUSSION...
ALTHOUGH THE HEAT REMAINS THE PRIMARY WEATHER STORY... THERE WILL
BE SCATTERED STORMS TO DEAL WITH THIS EVENING. LOCAL WRF AND HRRR
FORECAST DEVELOPMENT CONTINUING ACROSS CENTRAL AND WEST CENTRAL
OKLAHOMA WITH THE AREA OF STORMS LIFTING NORTH THIS AFTERNOON AND
INTO THE EVENING. HIGH DEWPOINT DEPRESSIONS SOUTH WILL GIVE A
FAVORABLE ENVIRONMENT FOR STRONG AND POTENTIALLY DAMAGING WINDS.
ALTHOUGH STORMS ARE A CERTAINTY INTO THIS EVENING... WILL
INITIALLY KEEP POPS IN THE 20 TO 30 PERCENT RANGE GIVEN THE
CURRENT UNCERTAINTIES OF AREAL COVERAGE.

OTHERWISE THE HOT WEATHER CONTINUES WITH NO CHANGE IN FORECAST
PHILOSOPHY THIS AFTERNOON. SURFACE FRONT AND ANY REMNANT OUTFLOW
BOUNDARIES WILL KEEP NORTHERN OKLAHOMA WITH SLIGHTLY LOWER
/BUT STILL HOT/ TEMPERATURES TOMORROW. THERE STILL REMAINS THE
SIGNAL IN THE MEDIUM RANGE MODELS OF THE POTENTIAL OF A SLIGHT
PATTERN SHIFT TOWARD THE END OF THE FORECAST PERIOD THAT COULD
TAKE THE EDGE OF THE VERY HOT TEMPERATURES... ALTHOUGH WILL
MAINTAIN TRIPLE DIGIT HIGHS IN THE PACKAGE AREAWIDE WITH THIS
PACKAGE.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  80 108  78 106 /  10  10   0  10
HOBART OK         82 108  81 108 /  10  10   0  10
WICHITA FALLS TX  84 111  83 110 /  10  10   0  10
GAGE OK           74 102  75 106 /  40  20  20  10
PONCA CITY OK     79 107  79 105 /  40  20  20  20
DURANT OK         84 110  83 107 /  10  10   0  10

&&

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

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

&&

11/30/32

Hazardous weather outlook, Aug 3, 4:30 PM CDT, 2 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
430 PM CDT WED AUG 3 2011

OKZ004>048-050>052-TXZ083>090-041100-
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-
430 PM CDT WED AUG 3 2011

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

.DAY ONE...THROUGH TONIGHT...

THUNDERSTORM OUTLOOK...
SCATTERED SEVERE THUNDERSTORMS WILL BE SEEN THROUGH THIS EVENING
ACROSS PARTS OF OKLAHOMA...PRIMARILY NEAR AND NORTH OF INTERSTATE-40.

DISCUSSION...
THE WEAK FRONTAL BOUNDARY OVER CENTRAL PORTIONS OF OKLAHOMA WILL BE
A FOCUS FOR SCATTERED THUNDERSTORMS. THE AIRMASS NEAR AND NORTH OF
THE FRONT WILL BE UNSTABLE. THIS WILL PLACE THE HIGHEST PROBABILITY
OF THUNDERSTORMS ACROSS THE NORTHERN HALF OF THE SOONER STATE. THE
MAIN CONCERNS WILL BE DAMAGING DOWNBURST WINDS AND HEAVY RAINFALL
DUE TO SLOW MOVEMENT. WITH VERY DRY VEGETATION...SOME OF THE STORMS
THAT DO NOT PRODUCE MUCH RAINFALL MAY YIELD WILDFIRES FROM THE
LIGHTNING.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT THURSDAY AUG 4.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY THAT THERE WILL BE SEVERE STORMS...100 PERCENT.

OTHER HAZARDOUS WEATHER...
HOT TEMPERATURES AND HIGH HUMIDITY WILL COMBINE TO PRODUCE DANGEROUS
HEAT INDICES FOR OKLAHOMA AND NORTH TEXAS. AN EXCESSIVE HEAT WARNING
REMAINS IN EFFECT. PLEASE REFER TO THE LATEST VERSION OF THIS
PRODUCT FOR MORE INFORMATION.

HOT...DRY WEATHER...COMBINED WITH STRESSED AND DORMANT VEGETATION...
WILL RESULT IN A CONTINUED HIGH RISK OF WILDFIRES.

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

THUNDERSTORM OUTLOOK...
THERE WILL BE AT LEAST A SLIGHT CHANCE FOR THUNDERSTORMS EACH DAY
THROUGH TUESDAY...MAINLY ACROSS THE NORTHERN HALF OF OKLAHOMA.

OTHER HAZARDOUS WEATHER...
THE PERSISTENT HOT WEATHER WILL CONTINUE UNABATED FOR MOST OF
OKLAHOMA AND NORTH TEXAS INTO NEXT WEEKEND. AN EXCESSIVE HEAT
WARNING WILL REMAIN IN EFFECT THROUGH SATURDAY.

THE WILDFIRE RISK WILL REMAIN HIGH THROUGH THE PERIOD...ESPECIALLY
ON SATURDAY...WHEN STRONGER WINDS ARE FORECAST.

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

In the hours before

Special weather statement, Aug 3, 4:54 PM CDT, 1 hour 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
454 PM CDT WED AUG 3 2011

OKZ015-032215-
DEWEY OK-
454 PM CDT WED AUG 3 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR DEWEY COUNTY.

AT 454 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR TALOGA...
MOVING NORTHEAST AT 10 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LAT...LON 3615 9901 3607 9877 3592 9895 3598 9907

..SPEG.

Local storm report, Aug 3, 5:08 PM CDT, 1 hour 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
508 PM CDT WED AUG 03 2011

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

0500 PM     TSTM WND GST     7 SSE RED ROCK          36.37N 97.13W
08/03/2011  M77 MPH          NOBLE              OK   MESONET

&&

NWS NORMAN

Special weather statement, Aug 3, 5:20 PM CDT, 1 hour 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
520 PM CDT WED AUG 3 2011

OKZ012-018-032245-
GARFIELD OK-KINGFISHER OK-
520 PM CDT WED AUG 3 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR GARFIELD AND KINGFISHER
COUNTIES.

AT 521 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER LACEY...MOVING
NORTH AT 10 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH...
WIND GUSTS TO 50 MPH...

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

LAT...LON 3616 9817 3619 9789 3597 9802 3603 9821

30

Special weather statement, Aug 3, 5:33 PM CDT, 1 hour 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
533 PM CDT WED AUG 3 2011

OKZ020-026-032300-
LINCOLN OK-PAYNE OK-
533 PM CDT WED AUG 3 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR LINCOLN AND PAYNE COUNTIES.

AT 533 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES NORTHWEST
OF CARNEY...MOVING NORTHEAST AT 10 MPH.

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

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

LAT...LON 3605 9702 3588 9683 3576 9714 3593 9713

30

Special weather statement, Aug 3, 5:34 PM CDT, 1 hour 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
534 PM CDT WED AUG 3 2011

OKZ010-015-032245-
DEWEY OK-WOODWARD OK-
534 PM CDT WED AUG 3 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR DEWEY AND WOODWARD COUNTIES.

AT 534 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTHWEST
OF CESTOS...MOVING NORTH AT 10 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LAT...LON 3626 9928 3624 9903 3601 9906 3603 9929

..SPEG.

Special weather statement, Aug 3, 6:22 PM CDT, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
622 PM CDT WED AUG 3 2011

OKZ012-032335-
GARFIELD OK-
622 PM CDT WED AUG 3 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR GARFIELD COUNTY.

AT 622 PM CDT...STRONG THUNDERSTORMS WERE LOCATED NEAR VANCE AIR
FORCE BASE AND NEAR HAYWARD...MOVING NORTHEAST AT 10 MPH. HAIL TO
THE SIZE OF DIMES HAS BEEN REPORTED AT VANCE AIR FORCE BASE.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LAT...LON 3640 9746 3633 9746 3622 9747 3632 9801
      3643 9785

..SPEG.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 7:52 PM CDT	Special Weather Statement	OUN	Woods	23 min
Aug 2, 8:20 PM CDT	Special Weather Statement	OUN	Harper, Woodward	25 min
Aug 3, 2:31 PM CDT	Special Weather Statement	OUN	Caddo	29 min
Aug 3, 2:59 PM CDT	Special Weather Statement	OUN	Caddo	31 min
Aug 3, 3:07 PM CDT	Special Weather Statement	OUN	Canadian	23 min
Aug 3, 3:09 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	36 min
Aug 3, 3:15 PM CDT	Special Weather Statement	OUN	Cleveland	30 min
Aug 3, 3:37 PM CDT	Special Weather Statement	OUN	Canadian	23 min
Aug 3, 3:53 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	52 min
Aug 3, 3:55 PM CDT	Special Weather Statement	OUN	Grady	20 min
Aug 3, 4:03 PM CDT	Special Weather Statement	OUN	Cleveland	27 min
Aug 3, 4:04 PM CDT	Special Weather Statement	OUN	Caddo	26 min
Aug 3, 4:20 PM CDT	Special Weather Statement	OUN	Ellis	25 min
Aug 3, 4:25 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Oklahoma	50 min
Aug 3, 4:40 PM CDT	Special Weather Statement	OUN	Cleveland	20 min
Aug 3, 4:45 PM CDT	Special Weather Statement	OUN	Ellis	30 min
Aug 3, 4:46 PM CDT	Special Weather Statement	OUN	Noble	14 min
Aug 3, 4:51 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	39 min
Aug 3, 4:54 PM CDT	Special Weather Statement	OUN	Dewey	21 min
Aug 3, 5:02 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Kingfisher	43 min
Aug 3, 5:06 PM CDT	Severe Thunderstorm Warning	OUN	Noble	39 min
Aug 3, 5:10 PM CDT	Severe Thunderstorm Warning	OUN	Dewey	27 min
Aug 3, 5:20 PM CDT	Special Weather Statement	OUN	Kingfisher	25 min
Aug 3, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher	49 min
Aug 3, 5:29 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	61 min
Aug 3, 5:33 PM CDT	Special Weather Statement	OUN	Payne	27 min
Aug 3, 5:34 PM CDT	Special Weather Statement	OUN	Dewey	11 min
Aug 3, 5:45 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Woodward	45 min
Aug 3, 5:54 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods	66 min
Aug 3, 6:22 PM CDT	Special Weather Statement	OUN	Garfield	13 min
Aug 3, 6:29 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	61 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.