Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 288, NWS Norman, OK

May 28, 20124 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 28, 2012, 9:11 PM CDT for 4 counties in Oklahoma. It was in force for 49 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: May 28, 2012, 9:11 PM CDT (02:11 UTC)
Expired: May 28, 2012, 10:00 PM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Canadian County, OK, Kingfisher County, OK, Logan County, OK, Oklahoma County, OK

The radar

The Norman radar (KTLX), 60 km from the middle of the area, began a volume at 02:11 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
May 28, 9:16 PM CDT	HAIL 1	Okarche, OK
May 28, 9:50 PM CDT	HAIL 1.75	2 W Concho, OK

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 5 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 28, 3:48 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.2 hours before the alert went out and 71 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: 2238 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1655 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

629 
WUUS54 KOUN 290211
SVROUN
OKC017-073-083-109-290300-
/O.NEW.KOUN.SV.W.0288.120529T0211Z-120529T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
911 PM CDT MON MAY 28 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CANADIAN COUNTY IN CENTRAL OKLAHOMA...
  KINGFISHER COUNTY IN CENTRAL OKLAHOMA...
  LOGAN COUNTY IN CENTRAL OKLAHOMA...
  OKLAHOMA COUNTY IN CENTRAL OKLAHOMA...

* UNTIL 1000 PM CDT

* AT 906 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
  A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE DAMAGING 
  HAIL UP TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS OF 65 MPH. 
  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM LANGSTON TO 
  CIMARRON CITY TO OKARCHE...MOVING EAST AT 20 MPH. 

* LOCATIONS IMPACTED INCLUDE...
  EDMOND...EL RENO...GUTHRIE...CONCHO...PIEDMONT...LANGSTON...
  CRESCENT...OKARCHE...CASHION...LUTHER...CALUMET...COYLE...
  ARCADIA...CIMARRON CITY...CEDAR VALLEY...MERIDIAN...NAVINA...
  SEWARD AND RICHLAND. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 35 BETWEEN MILE MARKERS 140 AND 166.
 INTERSTATE 40 BETWEEN MILE MARKERS 114 AND 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE INSIDE A STURDY BUILDING UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3597 9728 3597 9723 3594 9719 3594 9715
      3566 9714 3550 9815 3575 9818 3603 9744
TIME...MOT...LOC 0206Z 269DEG 17KT 3591 9727 3586 9761 3569 9796 

$$

30

1 follow-up statement

358 
WWUS54 KOUN 290241
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
941 PM CDT MON MAY 28 2012

OKC017-073-083-109-290300-
/O.CON.KOUN.SV.W.0288.000000T0000Z-120529T0300Z/
OKLAHOMA OK-KINGFISHER OK-CANADIAN OK-LOGAN OK-
941 PM CDT MON MAY 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM 
CDT FOR OKLAHOMA...SOUTHEASTERN KINGFISHER...CANADIAN AND LOGAN 
COUNTIES...

AT 939 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A 
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE DAMAGING 
HAIL UP TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH. 
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM PERKINS TO 
MERIDIAN TO CONCHO...MOVING SOUTHEAST AT 15 MPH. 

LOCATIONS IMPACTED INCLUDE...
EDMOND...GUTHRIE...CONCHO...PIEDMONT...LANGSTON...OKARCHE...
CASHION...LUTHER...CALUMET...COYLE...ARCADIA...CIMARRON CITY...
CEDAR VALLEY...MERIDIAN...NAVINA...SEWARD AND RICHLAND. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 35 BETWEEN MILE MARKERS 140 AND 163.
 INTERSTATE 40 BETWEEN MILE MARKERS 114 AND 120.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE INSIDE A STURDY BUILDING UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3594 9719 3594 9715 3566 9714 3550 9815
      3565 9816 3595 9752 3597 9724
TIME...MOT...LOC 0239Z 294DEG 13KT 3591 9708 3589 9729 3561 9803 

$$

30

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 May 28, 2:33 PM CDT, 6 hours 38 minutes earlier.

Area forecast discussion, May 28, 2:33 PM CDT, 6 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
233 PM CDT MON MAY 28 2012

.DISCUSSION...
FRONT HAS BECOME PRETTY MUCH STATIONARY THIS AFTERNOON ACROSS
PORTIONS OF THE FA. ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS
WILL BE POSSIBLE NEAR THE FRONT IN THE FA. ADDITIONAL STORMS ARE
EXPECTED TO DEVELOP WEST OF THE AREA AND MOVE INTO PARTS OF SW
OK/WEST NORTH TX THIS AFTN/EVENING. SOME OF THE STORMS COULD BECOME
SEVERE. THE SEVERE POTENTIAL WILL DIMINISH THIS EVENING BUT SOME
STORMS WILL BE POSSIBLE OVERNIGHT. THE FRONT COULD LIFT BACK NORTH
LATER TONIGHT. SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE NEAR THIS
BOUNDARY AGAIN TOMORROW AND MOVE ACROSS THE AREA. HOWEVER... SOME OF
THAT WILL BE CONDITIONAL ON HOW THINGS EVOLVE TONIGHT.

MODELS SHOW A SHORTWAVE MOVING ACROSS THE REGION WEDNESDAY/THURSDAY
WHICH WILL PROVIDE SOME UPPER SUPPORT FOR STORM DEVELOPMENT...
ESPECIALLY WED NIGHT/THURSDAY. A STRONGER COLD FRONT WILL ALSO MOVE
ACROSS THE AREA WEDNESDAY NIGHT/THURSDAY. SEVERE STORMS WILL REMAIN
POSSIBLE TUESDAY AND WEDNESDAY.

COOLER AIR WILL MOVE INTO THE REGION BEHIND THE COLD FRONT KNOCKING
TEMPERATURES DOWN BELOW NORMAL FOR THE LATTER PART OF THE WEEK.
TEMPERATURES WILL THEN RECOVER TO AOA NORMAL OVER THE WEEKEND INTO
EARLY NEXT WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  68  90  68  88 /  30  40  50  40
HOBART OK         66  91  67  92 /  30  30  40  40
WICHITA FALLS TX  69  94  71  94 /  60  30  30  20
GAGE OK           58  89  61  83 /  10  30  40  40
PONCA CITY OK     63  87  63  84 /  20  30  30  40
DURANT OK         70  92  69  87 /  40  30  50  40

&&

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

17/25

Hazardous weather outlook, May 28, 8:25 PM CDT, 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
825 PM CDT MON MAY 28 2012

OKZ004>048-050>052-TXZ083>090-291000-
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-
825 PM CDT MON MAY 28 2012

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT
OVER PARTS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK AREA IS SOUTH OF A LINE FROM ALTUS TO WATONGA...AND
PERRY. THIS INCLUDES ALL OF WESTERN NORTH TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE THROUGH
MIDNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THROUGH THE
EVENING HOURS.

IMPACTS...
HAIL LARGER THAN GOLF BALLS IS THE MAIN HAZARD AND CAN CAUSE DAMAGE
TO ROOFS...CROPS AND CARS. DAMAGING WIND GUSTS OVER 75 MPH MAY CAUSE
DAMAGE TO STRUCTURES...TREES AND UTILITY LINES.

DISCUSSION...
ISOLATED TO SCATTERED STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE ACROSS
PARTS OF SOUTHERN... CENTRAL AND INTO PORTIONS OF NORTH CENTRAL OKLAHOMA
AND WESTERN NORTH TEXAS THROUGH THE EVENING HOURS. ALTHOUGH THE THREAT
FOR SEVERE WEATHER WILL DECREASE AFTER MIDNIGHT...MARGINALLY SEVERE
HAIL AND WIND GUSTS WILL STILL BE A CONCERN.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY MAY 27.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS ARE EXPECTED TUESDAY THROUGH THURSDAY. SEVERAL
OPPORTUNITIES FOR THUNDERSTORMS WILL EXIST DURING THE AFTERNOON
AND OVERNIGHT HOURS...WITH DAMAGING HAIL AND WIND POSSIBLE. THE RISK
FOR THUNDERSTORMS SHOULD FINALLY PUSH EAST BY THURSDAY EVENING AS A
STRONG COLD FRONT MOVES FROM NORTH TO SOUTH OVER OKLAHOMA AND
WESTERN NORTH TEXAS.

OTHER HAZARDOUS WEATHER...
NONE.

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

MBS/MAXWELL/30

In the hours before

Special weather statement, May 28, 8:39 PM CDT, 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
839 PM CDT MON MAY 28 2012

OKZ046-050-290215-
LOVE OK-CARTER OK-
839 PM CDT MON MAY 28 2012

...SIGNIFICANT WEATHER ADVISORY FOR LOVE AND CARTER COUNTIES UNTIL
915 PM CDT...

AT 835 PM CDT...A STRONG THUNDERSTORM WAS LOCATED BETWEEN LONE
GROVE AND ARDMORE... MOVING EAST AT 30 MPH. OTHER STORMS WERE
LOCATED BETWEEN LAKE MURRAY BURNEYVILLE AND LEON.

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

LOCATIONS IMPACTED INCLUDE...
ARDMORE...LONE GROVE...MARIETTA...DICKSON...GENE AUTRY...
BURNEYVILLE...OVERBROOK AND LAKE MURRAY.

LAT...LON 3428 9724 3432 9695 3385 9703 3386 9707
      3384 9709 3382 9721 3385 9716 3392 9722
      3386 9726 3388 9730 3382 9737 3382 9741
TIME...MOT...LOC 0135Z 254DEG 27KT 3413 9719

Local storm report, May 28, 8:47 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
847 PM CDT MON MAY 28 2012

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

0845 PM     HAIL             OKARCHE                 35.73N 97.98W
05/28/2012  E1.00 INCH       CANADIAN           OK   TRAINED SPOTTER

&&

FM

Local storm report, May 28, 8:57 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
857 PM CDT MON MAY 28 2012

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

0853 PM     HAIL             1 NW OKARCHE            35.74N 97.99W
05/28/2012  E1.00 INCH       KINGFISHER         OK   PUBLIC

&&

FM

Local storm report, May 28, 9:00 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
900 PM CDT MON MAY 28 2012

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

0845 PM     HAIL             STILLWATER              36.12N 97.06W
05/28/2012  E1.00 INCH       PAYNE              OK   EMERGENCY MNGR

&&

FM

Local storm report, May 28, 9:04 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
904 PM CDT MON MAY 28 2012

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

0902 PM     HAIL             OKARCHE                 35.73N 97.98W
05/28/2012  E1.75 INCH       CANADIAN           OK   TRAINED SPOTTER

&&

FM

Local storm report, May 28, 9:07 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
907 PM CDT MON MAY 28 2012

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

0844 PM     HAIL             4 SW STELLA             35.28N 97.27W
05/28/2012  E1.75 INCH       CLEVELAND          OK   BROADCAST MEDIA

&&

FM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Grady, Stephens	45 min
May 28, 7:08 PM CDT	Special Weather Statement	OUN	Cleveland	22 min
May 28, 7:19 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pottawatomie	41 min
May 28, 7:40 PM CDT	Special Weather Statement	OUN	Logan	35 min
May 28, 7:41 PM CDT	Special Weather Statement	OUN	Carter, Love	34 min
May 28, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	Grady	32 min
May 28, 7:58 PM CDT	Severe Thunderstorm Warning	OUN	Payne	47 min
May 28, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain	45 min
May 28, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	48 min
May 28, 8:15 PM CDT	Special Weather Statement	OUN	Logan	30 min
May 28, 8:30 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan	45 min
May 28, 8:39 PM CDT	Special Weather Statement	OUN	Love	36 min
May 28, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	60 min
May 28, 9:15 PM CDT	Special Weather Statement	OUN	Marshall	30 min
May 28, 9:29 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	61 min
May 28, 9:57 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	22 min
May 28, 10:40 PM CDT	Special Weather Statement	OUN	Lincoln	35 min
May 28, 10:54 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	24 min
May 28, 11:20 PM CDT	Special Weather Statement	OUN	Atoka, Bryan, Carter, Johnston, Love, Marshall	25 min
May 28, 11:54 PM CDT	Special Weather Statement	OUN	Atoka, Bryan, Johnston, Love, Marshall	51 min
May 29, 12:41 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Marshall	49 min
May 29, 4:37 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	53 min
May 29, 4:51 PM CDT	Special Weather Statement	OUN	Kiowa	24 min
May 29, 5:10 PM CDT	Special Weather Statement	OUN	Kiowa	35 min
May 29, 5:12 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Jackson, Kiowa, Tillman	63 min
May 29, 5:14 PM CDT	Special Weather Statement	OUN	Tillman	31 min
May 29, 5:21 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	54 min
May 29, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	64 min
May 29, 5:28 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Grant, Kingfisher, Major	62 min
May 29, 5:40 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	65 min
May 29, 5:47 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	43 min
May 29, 6:06 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	54 min
May 29, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Kiowa, Tillman	66 min
May 29, 6:26 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Grant, Kingfisher, Logan and 1 more	64 min
May 29, 6:34 PM CDT	Special Weather Statement	OUN	Alfalfa	26 min
May 29, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	55 min
May 29, 6:43 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	47 min
May 29, 6:51 PM CDT	Severe Thunderstorm Warning	OUN	Grant	54 min
May 29, 6:54 PM CDT	Special Weather Statement	OUN	Kay	36 min
May 29, 6:55 PM CDT	Special Weather Statement	OUN	Noble, Payne	35 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.