Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 79, NWS Norman, OK

April 13, 20125 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 13, 2012, 2:06 PM CDT for 5 counties in Oklahoma. It was in force for 54 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: Apr 13, 2012, 2:06 PM CDT (19:06 UTC)
Expired: Apr 13, 2012, 3:00 PM CDT
In force: 54 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Comanche County, OK, Greer County, OK, Jackson County, OK, Kiowa County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 52 km from the middle of the area, began a volume at 19:08 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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
Apr 13, 1:28 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.1 hours before the alert went out and 159 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: 1194 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 554 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 477 m²/s²
0-3 km storm-relative helicity: 512 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 23.9

Open this sounding in Storm Lab

The text

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

162 
WUUS54 KOUN 131906
SVROUN
OKC031-055-065-075-149-132000-
/O.NEW.KOUN.SV.W.0079.120413T1906Z-120413T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
206 PM CDT FRI APR 13 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME NORTHWESTERN COMANCHE COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME SOUTHEASTERN GREER COUNTY IN SOUTHWESTERN OKLAHOMA...
  NORTHEASTERN JACKSON COUNTY IN SOUTHWESTERN OKLAHOMA...
  KIOWA COUNTY IN SOUTHWESTERN OKLAHOMA...
  EXTREME SOUTH CENTRAL WASHITA COUNTY IN WEST CENTRAL OKLAHOMA...

* UNTIL 300 PM CDT

* AT 203 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP 
  TO GOLF BALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS 
  STORM WAS LOCATED NEAR WARREN...MOVING NORTHEAST AT 25 MPH. 
  ANOTHER SEVERE STORM WAS LOCATED NEAR MARTHA.

* LOCATIONS IMPACTED INCLUDE...
  ALTUS...HOBART...BLAIR...ROOSEVELT...GOTEBO...MARTHA...COOPERTON...
  FRIENDSHIP...WARREN...
  ALTUS AIR FORCE BASE AND TOM STEED RESERVOIR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO WARNING.  GET 
TO A STORM SHELTER OR STURDY BUILDING IF A TORNADO APPROACHES.

&&

LAT...LON 3469 9946 3523 9898 3485 9860 3485 9860
      3463 9935
TIME...MOT...LOC 1903Z 224DEG 20KT 3480 9917 

$$

MAXWELL

2 follow-up statements

341 
WWUS54 KOUN 131929
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
229 PM CDT FRI APR 13 2012

OKC031-055-065-075-149-132000-
/O.CON.KOUN.SV.W.0079.000000T0000Z-120413T2000Z/
COMANCHE OK-WASHITA OK-GREER OK-KIOWA OK-JACKSON OK-
229 PM CDT FRI APR 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM 
CDT FOR EXTREME NORTHWESTERN COMANCHE...EXTREME SOUTH CENTRAL 
WASHITA...EXTREME SOUTHEASTERN GREER...KIOWA AND NORTHEASTERN 
JACKSON COUNTIES...

AT 227 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE 
THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF 
BALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED NEAR BLAIR...MOVING NORTHEAST AT 20 MPH. ANOTHER SEVERE 
THUNDERSTORM WAS LOCATED 4 MILES NORTHEAST OF ROOSEVELT. ANOTHER 
STORM WAS ALSO INTENSIFYING 5 MILES SOUTH OF MARTHA.

LOCATIONS IMPACTED INCLUDE...
ALTUS...HOBART...BLAIR...ROOSEVELT...GOTEBO...MARTHA...COOPERTON...
FRIENDSHIP...WARREN...ALTUS AIR FORCE BASE AND TOM STEED 
RESERVOIR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO WARNING.  GET 
TO A STORM SHELTER OR STURDY BUILDING IF A TORNADO APPROACHES.

MOVE INSIDE A STURDY BUILDING UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3469 9946 3523 9898 3485 9860 3485 9860
      3463 9935
TIME...MOT...LOC 1927Z 223DEG 16KT 3477 9931 

$$

MAXWELL

115 
WWUS54 KOUN 131948
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
248 PM CDT FRI APR 13 2012

OKC055-132010-
/O.CAN.KOUN.SV.W.0079.000000T0000Z-120413T2000Z/
GREER OK-
248 PM CDT FRI APR 13 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHEASTERN GREER 
COUNTY IS CANCELLED...

THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THE WARNING HAS BEEN CANCELLED. 

LAT...LON 3520 9895 3485 9860 3471 9907 3483 9924
TIME...MOT...LOC 1947Z 224DEG 28KT 3476 9901 

$$

OKC031-065-075-149-132000-
/O.CON.KOUN.SV.W.0079.000000T0000Z-120413T2000Z/
COMANCHE OK-WASHITA OK-KIOWA OK-JACKSON OK-
248 PM CDT FRI APR 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM 
CDT FOR EXTREME NORTHWESTERN COMANCHE...EXTREME SOUTH CENTRAL 
WASHITA...KIOWA AND EXTREME NORTHEASTERN JACKSON COUNTIES...

AT 245 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE 
THUNDERSTORM CAPABLE OF PRODUCING LARGE DESTRUCTIVE HAIL UP TO 
BASEBALL SIZE AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM 
WAS LOCATED NEAR TOM STEED RESERVOIR...MOVING NORTHEAST AT 30 MPH. 

LOCATIONS IMPACTED INCLUDE...
ROOSEVELT...GOTEBO...COOPERTON AND TOM STEED RESERVOIR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO WARNING.  GET 
TO A STORM SHELTER OR STURDY BUILDING IF A TORNADO APPROACHES.

MOVE INSIDE A STURDY BUILDING UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3520 9895 3485 9860 3471 9907 3483 9924
TIME...MOT...LOC 1945Z 224DEG 28KT 3476 9901 

$$

MAXWELL

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 Apr 13, 10:26 AM CDT, 3 hours 40 minutes earlier.

Area forecast discussion, Apr 13, 10:26 AM CDT, 3 hours 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1026 AM CDT FRI APR 13 2012

.UPDATE...
NO MAJOR CHANGES WERE MADE TO THE FORECAST PACKAGE THIS MORNING
AS MUCH OF THE INITIAL FORECAST IS ON TRACK THROUGH THIS
AFTERNOON. WINDS WERE TWEAKED TO BRING IN MOST RECENT OBS AND
ACCOUNT FOR EVOLUTION OF THE DRYLINE WHICH WILL RETREAT
NORTHWESTWARD LATE THIS AFTERNOON AND EVENING. ALSO INCREASED POPS
ACROSS WESTERN AND CENTRAL OKLAHOMA AS RECENT MESOSCALE MODELS
HAVE BEEN PERSISTENT IN INITIATING CONVECTION IN THIS AREA LATER
TODAY. SEVERE WEATHER STILL APPEARS LIKELY ACROSS PARTS OF
NORTHERN AND WEST CENTRAL OKLAHOMA LATER THIS AFTERNOON. STORMS
WILL LIKELY LAST INTO THE EVENING AND POSSIBLY OVERNIGHT AS A
STRONG LOW LEVEL JET ENSUES. MAIN THREATS WILL CONTINUE TO BE VERY
LARGE HAIL...DAMAGING WINDS...AND TORNADOES. A WINDOW OF
OPPORTUNITY WILL EXIST FOR A STRONG TORNADO THIS EVENING AS THE
LOW LEVEL JET STRENGTHENS...ENHANCING STORM INFLOW AND LOW LEVEL
ROTATION FOR ANY SUPERCELLS THAT PERSIST THROUGH THE EVENING.

ZONE UPDATES TO BE SENT SHORTLY.

&&

.PREV DISCUSSION... /ISSUED 554 AM CDT FRI APR 13 2012/

AVIATION...
MVFR CEILINGS ARE EXPCTED MUCH OF FRIDAY MORNING IN CENTRAL
OKLAHOMA. VERY GUSTY SOUTH WIND WILL PERSIST. FRIDAY EVENING
THUNDERSTORMS ARE EXPCTED IN NORTHWEST OKLAHOMA AND THE MOVING
INTO NORTH CENTRAL AND POSSIBLY CENTRAL OKLAHOMA LATE. SOME IFR
CEILINGS ARE EXPECTED AFTER 140600.

PREV DISCUSSION... /ISSUED 331 AM CDT FRI APR 13 2012/

DISCUSSION...
NEARLY ALL OF THE CHANGING WEATHER WILL OCCUR THIS WEEKEND
ALLOWING NEXT WEEK TO BE RATHER TRANQUIL AND WARM WITH LITTLE
CHANCE FOR RAIN. IN THE MEAN TIME, A SIGNIFICANT SEVERE WEATHER
EPISODE IS TAKING FORM FOR LATE SATURDAY IN WESTERN AND CENTRAL
OKLAHOMA. BEFORE THEN, MOISTURE WILL CONTINUE ITS INCREASE TODAY
AND SHOWERS AND THUNDERSTORMS MAY OCCUR NEAR A DRYLINE WHICH IS
EXPECTED TO ENTER NORTHWEST OKLAHOMA LATE THIS AFTERNOON. ANY
STORMS WHICH FORM WILL LIKELY BECOME SUPERCELLS AND MOVE QUICKLY
NORTHEAST. THERE IS A TORNADO AND LARGE HAIL THREAT. ON SATURDAY,
AS THE LARGE-SCALE UPPER WAVE APPROACHES THE SHEAR WILL BE
STRONGER STILL AND THE DRYLINE IS EXPECTED TO BE ORIENTED MORE
NORTH-SOUTH AS IT MOVES ACROSS THE LARGER WESTERN BORDER OF
OKLAHOMA EARLY IN THE EVENING. SEVERE WEATHER INCLUDING TORNADOES
AND GIANT HAIL IS EXPECTED TO HAVE A LARGE COVERAGE FROM OKLHAOMA
CITY NORTH. COVERAGE IS EXPECTED TO BE LESS IN WESTERN AND
SOUTHERN OKLAHOMA, BUT THE SEVERE RISK REMAINS HIGH.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  77  65  78  61 /  40  40  20  70
HOBART OK         79  63  80  56 /  40  40  30  70
WICHITA FALLS TX  80  66  81  63 /  20  20  20  50
GAGE OK           85  56  78  52 /  30  30  30  30
PONCA CITY OK     75  65  76  64 /  50  50  20  70
DURANT OK         73  65  76  65 /  20  20  20  40

&&

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

84/30

Hazardous weather outlook, Apr 13, 12:25 PM CDT, 1 hour 41 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE NORMAN OK
1225 PM CDT FRI APR 13 2012

OKZ004>048-050>052-TXZ083>090-141100-
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-
1225 PM CDT FRI APR 13 2012

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

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

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT
ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK AREA IS GENERALLY NORTHWEST OF AN ATOKA TO LAKE
MURRAY LINE...INCLUDING ALL OF NORTHERN...WESTERN AND CENTRAL
OKLAHOMA...AND WESTERN NORTH TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE STORMS WILL BE FROM 4 PM TO 2 AM.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS FROM THIS
AFTERNOON THROUGH EARLY SATURDAY MORNING.

DISCUSSION...
A DIFFUSE DRYLINE/FRONTAL BOUNDARY WILL CONTINUE TO SHIFT
NORTHWESTWARD AND SHARPEN ACROSS WESTERN OKLAHOMA AND
PORTIONS OF WESTERN NORTH TEXAS THROUGH THIS AFTERNOON AND EVENING.
AS LOW LEVEL WINDS INCREASE TODAY...A MOIST AND VERY UNSTABLE
AIRMASS WILL DEVELOP OVER THE AREA AHEAD OF THIS FEATURE. SEVERE
THUNDERSTORMS ARE EXPECTED TO INITIATE LATE THIS AFTERNOON AND
EVENING ALONG THIS BOUNDARY. GIVEN THE MAGNITUDE OF INSTABILITY AND
WIND SHEAR...SUPERCELLS ARE EXPECTED WITH A THREAT OF VERY LARGE
HAIL...DAMAGING WINDS...AND TORNADOES. THE STRONGEST STORMS WILL
PRODUCE HAIL TO THE SIZE OF BASEBALLS AND DAMAGING WINDS OF 70 MPH.
THE TORNADO THREAT WILL INCREASE THIS EVENING AS THE LOW LEVEL JET
INCREASES AIDING IN LOW LEVEL STORM INFLOW AND ROTATION.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY APR 14.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...70 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...80 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
A POTENT UPPER LEVEL STORM SYSTEM WILL OVERSPREAD THE REGION
SATURDAY. WITH AN UNSTABLE AIRMASS IN PLACE AND VERY FAVORABLE WIND
FIELDS IN PLACE...SEVERE THUNDERSTORMS ARE EXPECTED. STORMS WILL
INITIALLY FIRE ALONG A DRYLINE OVER WESTERN OKLAHOMA DURING THE LATE
AFTERNOON AND EVENING HOURS. A COLD FRONT WILL BEGIN TO OVERTAKE THE
DRYLINE DURING THE EVENING AND OVERNIGHT...SHIFTING THE THREAT FOR
SEVERE WEATHER EASTWARD THROUGH SATURDAY NIGHT. THE THREAT FOR
SEVERE WEATHER WILL THEN CONTINUE INTO SUNDAY AS THE FRONT MOVES
INTO SOUTHERN AND EASTERN OKLAHOMA. GIVEN VERY FAVORABLE CONDITIONS
FOR SEVERE STORMS...SUPERCELLS ARE EXPECTED SATURDAY AFTERNOON WITH
AN INITIAL THREAT OF VERY LARGE AND DAMAGING HAIL...TORNADOES...AND
DAMAGING WINDS. STRONG TORNADOES WILL ALSO BE POSSIBLE WITH THE
STRONGEST SUPERCELLS. STORMS ARE EXPECTED TO MERGE INTO AN EASTWARD
MOVING SQUALL LINE AHEAD OF THE FRONT LATE SATURDAY NIGHT INTO
SUNDAY WITH A THREAT OF MAINLY HAIL AND DAMAGING WINDS EVOLVING BY
SATURDAY NIGHT INTO SUNDAY. PREPARE NOW FOR THREATENING WEATHER
CONDITIONS. ENSURE STORM SHELTERS AND SAFE ROOMS ARE READY IN THE
EVENT YOU MUST TAKE COVER THIS WEEKEND. THE THREAT OF SEVERE WEATHER
WILL END SUNDAY NIGHT AS A MORE STABLE AIRMASS MOVES INTO THE
SOUTHERN PLAINS.

OTHER HAZARDOUS
WEATHER...NONE.

THE NEXT SCHEDULES HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM
SATURDAY.

In the hours before

Special weather statement, Apr 13, 1:27 PM CDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
127 PM CDT FRI APR 13 2012

OKZ023-027-038-131900-
CADDO OK-GRADY OK-COMANCHE OK-
127 PM CDT FRI APR 13 2012

...SIGNIFICANT WEATHER ADVISORY FOR CADDO...WEST CENTRAL GRADY AND
NORTH CENTRAL COMANCHE COUNTIES UNTIL 200 PM CDT...

AT 126 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR MEDICINE
PARK...MOVING NORTHEAST AT 45 MPH.

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

LOCATIONS IMPACTED INCLUDE...
ANADARKO...APACHE...CYRIL...CEMENT...MEDICINE PARK...NORGE...BOONE...
MEERS...LAKE ELLSWORTH...STECKER...LAVERTY AND LAKE LAWTONKA.

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

LAT...LON 3520 9824 3495 9794 3469 9857 3477 9865
TIME...MOT...LOC 1826Z 230DEG 41KT 3480 9847

MAXWELL

Special weather statement, Apr 13, 1:37 PM CDT, 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
137 PM CDT FRI APR 13 2012

TXZ083-084-131900-
HARDEMAN TX-FOARD TX-
137 PM CDT FRI APR 13 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HARDEMAN AND
FOARD COUNTIES UNTIL 200 PM CDT...

AT 135 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 8 MILES EAST OF
HACKBERRY...MOVING NORTHEAST AT 35 MPH.

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

LOCATIONS IMPACTED INCLUDE...
MARGARET AND COPPERS BREAK STATE PARK.

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

LAT...LON 3410 10004 3428 9984 3405 9962 3399 9978
      3390 10004
TIME...MOT...LOC 1835Z 228DEG 29KT 3398 10001

MAXWELL

Special weather statement, Apr 13, 1:59 PM CDT, 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
159 PM CDT FRI APR 13 2012

OKZ035-036-131930-
KIOWA OK-JACKSON OK-
159 PM CDT FRI APR 13 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN KIOWA AND
NORTHEASTERN JACKSON COUNTIES UNTIL 230 PM CDT...

AT 154 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR WARREN...
MOVING NORTHEAST AT 30 MPH.

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

LOCATIONS IMPACTED INCLUDE...
ROOSEVELT...FRIENDSHIP AND WARREN.

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

LAT...LON 3481 9927 3481 9925 3484 9925 3500 9912
      3481 9887 3468 9924 3474 9934
TIME...MOT...LOC 1854Z 224DEG 25KT 3476 9921

MAXWELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 1:27 PM CDT	Special Weather Statement	OUN	Caddo	33 min
Apr 13, 1:49 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	41 min
Apr 13, 1:59 PM CDT	Special Weather Statement	OUN	Kiowa	31 min
Apr 13, 2:14 PM CDT	Special Weather Statement	OUN	Comanche	31 min
Apr 13, 2:17 PM CDT	Special Weather Statement	OUN	Jackson	28 min
Apr 13, 2:20 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	25 min
Apr 13, 2:25 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	50 min
Apr 13, 2:28 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	47 min
Apr 13, 2:31 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	59 min
Apr 13, 2:58 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa, Washita	62 min
Apr 13, 3:14 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	46 min
Apr 13, 3:26 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	49 min
Apr 13, 3:28 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	19 min
Apr 13, 3:45 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa	60 min
Apr 13, 3:53 PM CDT	Special Weather Statement	OUN	Kay	52 min
Apr 13, 3:55 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma	65 min
Apr 13, 3:59 PM CDT	Tornado Warning	OUN	Cleveland	31 min
Apr 13, 4:03 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa, Washita	42 min
Apr 13, 4:05 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	40 min
Apr 13, 4:28 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	62 min
Apr 13, 4:40 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	65 min
Apr 13, 4:47 PM CDT	Special Weather Statement	OUN	Logan, Payne	28 min
Apr 13, 4:48 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	57 min
Apr 13, 4:51 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie	54 min
Apr 13, 5:05 PM CDT	Tornado Warning	OUN	Pottawatomie	25 min
Apr 13, 5:09 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	45 min
Apr 13, 5:22 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	38 min
Apr 13, 5:29 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa, Washita	61 min
Apr 13, 5:43 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa	62 min
Apr 13, 5:55 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	50 min
Apr 13, 5:56 PM CDT	Special Weather Statement	OUN	Grant	34 min
Apr 13, 6:12 PM CDT	Tornado Warning	OUN	Jackson, Kiowa	33 min
Apr 13, 6:13 PM CDT	Special Weather Statement	OUN	Blaine	32 min
Apr 13, 6:16 PM CDT	Special Weather Statement	OUN	Oklahoma	29 min
Apr 13, 6:27 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	18 min
Apr 13, 6:38 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	52 min
Apr 13, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	36 min
Apr 13, 6:46 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Greer, Jackson, Kiowa, Washita	59 min
Apr 13, 6:47 PM CDT	Special Weather Statement	OUN	Grant	13 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.