Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 67, NWS Norman, OK

April 22, 20115 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 22, 2011, 10:18 PM CDT for 5 counties in Oklahoma. It was in force for 57 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 22, 2011, 10:18 PM CDT (03:18 UTC)
Expired: Apr 22, 2011, 11:15 PM CDT
In force: 57 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Cleveland County, OK, Garvin County, OK, Grady County, OK, McClain County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 58 km from the middle of the area, began a volume at 03:18 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 22, 3:47 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 3.3 hours before the alert went out and 199 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: 2322 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 231 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.

947 
WUUS54 KOUN 230318
SVROUN
OKC027-049-051-087-137-230415-
/O.NEW.KOUN.SV.W.0067.110423T0318Z-110423T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1018 PM CDT FRI APR 22 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CLEVELAND COUNTY IN CENTRAL OKLAHOMA...
  SOUTHEASTERN GRADY COUNTY IN CENTRAL OKLAHOMA...
  MCCLAIN COUNTY IN CENTRAL OKLAHOMA...
  NORTHWESTERN GARVIN COUNTY IN SOUTHERN OKLAHOMA...
  NORTHEASTERN STEPHENS COUNTY IN SOUTHERN OKLAHOMA...

* UNTIL 1115 PM CDT

* AT 1018 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE 
THUNDERSTORM NEAR BRAY...MOVING NORTHEAST AT 45 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF GOLF BALLS...
WIND GUSTS TO 60 MPH...

* LOCATIONS IN THE WARNING INCLUDE ANTIOCH...BRADLEY...BRAY...COX
  CITY...CRINER...ERIN SPRINGS...GOLDSBY...LEXINGTON...LINDSAY...
  MAYSVILLE...PAOLI...PAYNE...PURCELL...ROSEDALE...SLAUGHTERVILLE...
  WASHINGTON...WAYNE AND WHITEBEAD.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 76 AND 105.

LAT...LON 3453 9779 3467 9793 3517 9747 3497 9714
      3493 9713 3493 9708 3489 9702
TIME...MOT...LOC 0318Z 231DEG 33KT 3468 9776

$$

1 follow-up statement

765 
WWUS54 KOUN 230335 RRA
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1035 PM CDT FRI APR 22 2011

OKC137-230345-
/O.CAN.KOUN.SV.W.0067.000000T0000Z-110423T0415Z/
STEPHENS OK-
1035 PM CDT FRI APR 22 2011

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR
NORTHEASTERN STEPHENS COUNTY...

LAT...LON 3468 9755 3469 9787 3517 9747 3497 9714
      3494 9714 3493 9713 3493 9708 3489 9703
TIME...MOT...LOC 0335Z 225DEG 26KT 3473 9768

$$

OKC027-049-051-087-230415-
/O.CON.KOUN.SV.W.0067.000000T0000Z-110423T0415Z/
CLEVELAND OK-GRADY OK-MCCLAIN OK-GARVIN OK-
1035 PM CDT FRI APR 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR NORTHWESTERN GARVIN...MCCLAIN...SOUTHEASTERN GRADY AND
SOUTHEASTERN CLEVELAND COUNTIES...

AT 1035 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM 9 MILES SOUTHWEST OF LINDSAY...MOVING NORTHEAST AT 30
MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF QUARTERS...
WIND GUSTS TO 60 MPH...

* LOCATIONS IN THE WARNING INCLUDE BRADLEY...COX CITY...CRINER...ERIN
  SPRINGS...GOLDSBY...LEXINGTON...LINDSAY...MAYSVILLE...PAOLI...
  PAYNE...PURCELL...ROSEDALE...SLAUGHTERVILLE...WASHINGTON AND WAYNE.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 77 AND 105.

LAT...LON 3468 9755 3469 9787 3517 9747 3497 9714
      3494 9714 3493 9713 3493 9708 3489 9703
TIME...MOT...LOC 0335Z 225DEG 26KT 3473 9768

$$

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 22, 7:00 PM CDT, 3 hours 18 minutes earlier.

Area forecast discussion, Apr 22, 7:00 PM CDT, 3 hours 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
700 PM CDT FRI APR 22 2011

.AVIATION...
23/00Z TAFS...VFR CONDITIONS EXPECTED TO PREVAIL THROUGH THE FIRST 6
TO 9 HOURS...BEFORE MOIST VEERING WIND PROFILE COMMENCES NEAR/NORTH
OF FRONTAL BOUNDARY LATE TONIGHT AND TOMORROW. THIS EXPECTED TO
RESULT IN WIDESPREAD VFR/MARGINAL MVFR CEILINGS LATE TONIGHT AND
TOMORROW NEAR STALLED FRONT...PRIMARILY ALL BUT FAR NORTHWEST
OKLAHOMA TERMINALS. WILL MINIMIZE USE OF RA/TSRA FOR TOMORROW.

WILL INCLUDE CB IN KOKC/KOUN DUE TO PROXIMITY TO STORMS SE OF
TERMINALS. STORMS WILL ALSO AFFECT KSPS FOR THE FIRST HOUR OR SO OF
FORECAST.

&&

.DISCUSSION...
ACTIVE WEATHER PATTERN WILL CONTINUE INTO EARLY NEXT WEEK. COLD
FRONT HAS BEGUN TO SLOW DOWN THIS AFTERNOON CURRENTLY EXTENDING
ACROSS PORTIONS OF CENTRAL AND SOUTHWEST OK. THE FRONT IS EXPECTED
TO EVENTUALLY STALL THIS EVENING. THUNDERSTORMS ARE EXPECTED TO
DEVELOP NEAR OR AHEAD OF THE FRONT AND DRYLINE LATE THIS AFTERNOON
AND THIS EVENING. WIND SHEAR AND STRONG INSTABILITY WILL BE
SUFFICIENT FOR SEVERE STORMS TO DEVELOP PRODUCING VERY LARGE HAIL...
STRONG WINDS... AND MAYBE A FEW TORNADOES. MODELS NOW SHOW A SFC LOW
DEVELOPING ALONG THE FRONT TO THE WEST OF THE FA FORCING THE FRONTAL
BOUNDARY TO LIFT BACK NORTH SOME OVERNIGHT. SHOWERS AND
THUNDERSTORMS WILL BE POSSIBLE NORTH OF THE FRONT AS LLJ INCREASES
SPREADING THE MOIST AIR NORTHWARD OVER THE FRONT. A FEW OF THESE
ELEVATED STORMS MAY ALSO BECOME SEVERE PRODUCING LARGE HAIL.

RAIN CHANCES WILL CONTINUE OVER THE WEEKEND BUT THE EXACT LOCATIONS
FOR BEST CHANCES OF PRECIP WILL BE SOMEWHAT DEPENDENT ON WHAT
HAPPENS THE DAY/NIGHT BEFORE AND POSITION OF THE FRONTAL BOUNDARY.
MODELS SHOW THE FRONT MOVING BACK SOUTH SATURDAY BEFORE SLOWING
DOWN/STALLING. HERE THE MODELS BEGIN TO DIFFER WHERE THIS WILL OCCUR
WITH GFS HOLDING THE FRONT A LITTLE BIT FURTHER NORTH IN THE CWA
THAN THE NAM. HOWEVER... SHOWERS AND THUNDERSTORMS WILL REMAIN
POSSIBLE ALONG AND NORTH OF THE FRONT AS IMPULSES MOVE THROUGH THE
SW UPPER FLOW. MODELS SHOW UPPER TROUGH MOVING ACROSS THE SOUTHERN
ROCKIES INTO THE SOUTHERN PLAINS SUNDAY INTO MONDAY. THIS WILL
PROVIDE ADDITIONAL LIFT TO THE REGION FOR RAIN CHANCES TO CONTINUE
INTO EARLY NEXT WEEK. ANOTHER SYSTEM WILL FOLLOW QUICKLY ON ITS
HEELS AFFECTING THE REGION TUESDAY INTO WEDNESDAY. MODELS SHOW UPPER
RIDGING THEN DEVELOPING OVER THE REGION LATE NEXT WEEK. SEVERE
WEATHER WILL REMAIN POSSIBLE OVER THE WEEKEND INTO EARLY NEXT WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  63  70  56  67 /  40  30  50  50
HOBART OK         59  74  51  67 /  20  20  40  30
WICHITA FALLS TX  65  84  61  77 /  40  30  40  30
GAGE OK           45  64  42  62 /  10  10  40  20
PONCA CITY OK     53  64  50  62 /  50  40  50  50
DURANT OK         68  82  65  77 /  50  40  40  30

&&

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

06/25

Hazardous weather outlook, Apr 22, 7:20 PM CDT, 2 hours 58 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
720 PM CDT FRI APR 22 2011

OKZ004>048-050>052-TXZ083>090-231000-
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-
720 PM CDT FRI APR 22 2011

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

.DAY ONE...THIS EVENING AND TONIGHT...

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

LOCATION...
THE SLIGHT RISK INCLUDES THE AREA SOUTH AND EAST OF A LINE FROM
STILLWATER TO KINGFISHER TO FREDERICK OKLAHOMA...TO GRAYBACK AND
SEYMOUR TEXAS.

TIMING...
ONE ROUND OF THUNDERSTORMS...PRODUCING THE GREATEST RISK OF SEVERE
WEATHER...IS EXPECTED PRIOR TO MIDNIGHT. ADDITIONAL THUNDERSTORMS...
CARRYING PRIMARILY A RISK OF LARGE HAIL...MAY FORM AFTER MIDNIGHT.

IMPACTS...
SIGNIFICANT DAMAGE TO AUTOMOBILES...ROOFTOPS...AND VEGETATION FROM
HAIL TO BASEBALL SIZE OR LARGER.

DAMAGING WIND GUSTS TO 70 MPH.

A FEW TORNADOES...MAINLY IN SOUTHERN AND EASTERN PORTIONS OF THE
RISK AREA...TO THE SOUTH AND EAST OF BOTH OKLAHOMA CITY AND WICHITA
FALLS.

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

DISCUSSION...
VERY WARM AND HUMID AIR AHEAD OF A NEARLY STATIONARY FRONT STRETCHED
FROM ALTUS... TO CHICKASHA... TO CHANDLER HAVE CREATED A VERY
UNSTABLE ATMOSPHERE. THROUGH THIS EVENING...WIND SHEAR IS VERY
FAVORABLE FOR SUPERCELLS... WITH THE MAIN RISK BEING VERY LARGE AND
DAMAGING HAIL. TORNADOES ARE ALSO POSSIBLE... ESPECIALLY OWING TO
THE VERY STRONG INSTABILITY. IF A LARGE NUMBER OF STORMS IS ABLE TO
PERSIST...SOME GROWTH INTO A LINE OR CLUSTER MAY OCCUR...AND THIS
WOULD INCREASE THE THREAT OF DAMAGING WINDS ACROSS FAR SOUTHEAST
OKLAHOMA.

THEN...AFTER MIDNIGHT...A SECOND ROUND OF ACTIVITY MAY OCCUR...WHEN
THE LOW LEVEL JET CARRIES UNSTABLE AIR UP TO THE NORTH OF THE SLOW
MOVING FRONT. STORMS ROOTED WELL ABOVE THE SURFACE MAY DEVELOP
TOWARD THE WESTERN AND NORTHERN PORTIONS OF THE SLIGHT RISK AREA...
CARRYING A RISK OF LARGE HAIL...FREQUENT LIGHTNING...AND LOCALLY
HEAVY RAINFALL.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY APR 23.
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...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
EPISODES OF STRONG TO SEVERE THUNDERSTORMS MAY OCCUR...OFF AND ON...
EACH DAY THROUGH MONDAY. THESE STORMS WILL BE SUPPORTED BY THE
PRESENCE OF A SURFACE FRONTAL BOUNDARY...BENEATH MODERATE
SOUTHWESTERLY FLOW ALOFT...WITH ADEQUATE GULF MOISTURE IN PLACE.

OTHER HAZARDOUS WEATHER...
STRONG LOW PRESSURE WILL DRAG A DRYLINE THROUGH PORTIONS OF THE
REGION ON MONDAY. FIRE WEATHER CONDITIONS MAY BECOME EXTREME BEHIND
THE DRYLINE.

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

In the hours before

Local storm report, Apr 22, 9:38 PM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
938 PM CDT FRI APR 22 2011

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

0930 PM     HAIL             5 W WALTERS             34.36N 98.40W
04/22/2011  E2.75 INCH       COTTON             OK   AMATEUR RADIO

&&

CM

Local storm report, Apr 22, 9:39 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
939 PM CDT FRI APR 22 2011

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

0936 PM     HAIL             CORUM                   34.37N 98.10W
04/22/2011  E1.75 INCH       STEPHENS           OK   AMATEUR RADIO

&&

MA

Local storm report, Apr 22, 9:40 PM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
940 PM CDT FRI APR 22 2011

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

0920 PM     HAIL             W DUNCAN                34.50N 97.96W
04/22/2011  E1.75 INCH       STEPHENS           OK   LAW ENFORCEMENT

            DELAYED REPORT VIA DUNCAN PD OF GOLF BALL SIZED HAIL ON
            WESTERN CITY LIMIT OF DUNCAN.

&&

BAIN

Local storm report, Apr 22, 9:41 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
941 PM CDT FRI APR 22 2011

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

0936 PM     HAIL             9 W ELMORE CITY         34.62N 97.55W
04/22/2011  E1.00 INCH       GARVIN             OK   AMATEUR RADIO

            MULTIPLE REPORTS OF QUARTER SIZED HAIL.

&&

MA

Local storm report, Apr 22, 9:47 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
947 PM CDT FRI APR 22 2011

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

0845 PM     HAIL             RYAN                    34.02N 97.95W
04/22/2011  E1.00 INCH       JEFFERSON          OK   PUBLIC

            DELAYED REPORT OF QUARTER SIZED HAIL IN RYAN RELAYED BY
            RYAN FIRE DEPARTMENT.

&&

MA

Local storm report, Apr 22, 10:13 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1013 PM CDT FRI APR 22 2011

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

1013 PM     HAIL             2 W CORUM               34.37N 98.14W
04/22/2011  E1.00 INCH       STEPHENS           OK   AMATEUR RADIO

&&

MA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, McClain, Pontotoc, Pottawatomie, Seminole	60 min
Apr 22, 7:06 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	39 min
Apr 22, 7:20 PM CDT	Special Weather Statement	OUN	McClain	10 min
Apr 22, 7:26 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain	34 min
Apr 22, 7:30 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	45 min
Apr 22, 7:34 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Stephens	15 min
Apr 22, 7:45 PM CDT	Tornado Warning	OUN	Garvin, McClain, Pontotoc, Pottawatomie, Seminole	45 min
Apr 22, 7:59 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Pontotoc, Pottawatomie, Seminole and 1 more	61 min
Apr 22, 8:09 PM CDT	Tornado Warning	OUN	Garvin, Pontotoc	36 min
Apr 22, 8:14 PM CDT	Flash Flood Warning	OUN	Garvin, McClain, Pottawatomie	3 hr
Apr 22, 8:14 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	46 min
Apr 22, 8:19 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Stephens	41 min
Apr 22, 8:44 PM CDT	Tornado Warning	OUN	Pontotoc	31 min
Apr 22, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	34 min
Apr 22, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Garvin, Grady, Hughes, Murray, Pontotoc and 2 more	61 min
Apr 22, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Stephens	61 min
Apr 22, 9:13 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	32 min
Apr 22, 9:29 PM CDT	Areal Flood Advisory	OUN	Garvin, Grady, Pontotoc, Stephens	3 hr
Apr 22, 9:37 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Hughes	53 min
Apr 22, 9:41 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	64 min
Apr 22, 9:50 PM CDT	Flash Flood Warning	OUN	Cotton	4 hr
Apr 22, 9:58 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Jefferson, Stephens	47 min
Apr 22, 9:58 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Johnston, Murray, Pontotoc	62 min
Apr 22, 10:30 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	43 min
Apr 22, 10:41 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Jefferson, Stephens	49 min
Apr 22, 11:06 PM CDT	Severe Thunderstorm Warning	OUN	Pontotoc	54 min
Apr 22, 11:22 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pottawatomie	53 min
Apr 22, 11:29 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Comanche, Cotton, Garvin, Jefferson, Stephens	61 min
Apr 22, 11:34 PM CDT	Special Weather Statement	OUN	Atoka	26 min
Apr 22, 11:49 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pontotoc, Pottawatomie	56 min
Apr 23, 12:13 AM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pottawatomie, Seminole	33 min
Apr 23, 12:29 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Grady, Stephens	46 min
Apr 23, 12:32 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc	19 min
Apr 23, 12:56 AM CDT	Special Weather Statement	OUN	Coal	19 min
Apr 23, 1:14 AM CDT	Special Weather Statement	OUN	Hughes	31 min
Apr 23, 1:40 AM CDT	Special Weather Statement	OUN	Atoka	20 min
Apr 23, 4:58 PM CDT	Special Weather Statement	OUN	Love	17 min
Apr 23, 5:21 PM CDT	Special Weather Statement	OUN	Love	24 min
Apr 23, 5:42 PM CDT	Special Weather Statement	OUN	Love	18 min
Apr 23, 6:05 PM CDT	Special Weather Statement	OUN	Love	10 min
Apr 23, 6:36 PM CDT	Special Weather Statement	OUN	Marshall	9 min
Apr 23, 6:52 PM CDT	Special Weather Statement	OUN	Love	23 min
Apr 23, 6:58 PM CDT	Severe Thunderstorm Warning	OUN	Love	62 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.