Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 75, NWS Norman, OK

April 23, 2011Comanche County, Grady County, Stephens County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 23, 2011, 12:29 AM CDT for Comanche County, Grady County, Stephens County, Oklahoma. It was in force for 46 min. 1 report 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: Apr 23, 2011, 12:29 AM CDT (05:29 UTC)
Expired: Apr 23, 2011, 1:15 AM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Comanche County, OK, Grady County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 92 km from the middle of the area, began a volume at 05:32 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
Apr 23, 12:40 AM CDT	HAIL 1.75	Central High, OK	QUARTER TO GOLF BALL SIZED HAIL REPORTED AT 8-MILE ROAD IN CENTRAL HIGH.

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 one storm report to this severe thunderstorm warning; the first came 11 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
Apr 22, 11:35 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 5.5 hours before the alert went out and 213 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.

756 
WUUS54 KOUN 230529
SVROUN
OKC031-051-137-230615-
/O.NEW.KOUN.SV.W.0075.110423T0529Z-110423T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1229 AM CDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN GRADY COUNTY IN CENTRAL OKLAHOMA...
  NORTHWESTERN STEPHENS COUNTY IN SOUTHERN OKLAHOMA...
  EASTERN COMANCHE COUNTY IN SOUTHWEST OKLAHOMA...

* UNTIL 115 AM CDT

* AT 1228 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM 9 MILES WEST OF MARLOW...MOVING NORTHEAST AT 20 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO TWO INCHES IN DIAMETER...
WIND GUSTS TO 60 MPH...

* LOCATIONS IN THE WARNING INCLUDE ACME...AGAWAM...CENTRAL HIGH...
  MARLOW AND RUSH SPRINGS.

LAT...LON 3493 9797 3469 9771 3454 9812 3467 9822
TIME...MOT...LOC 0528Z 242DEG 16KT 3464 9811

$$

3 follow-up statements

903 
WWUS54 KOUN 230539
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1239 AM CDT SAT APR 23 2011

OKC031-230549-
/O.CAN.KOUN.SV.W.0075.000000T0000Z-110423T0615Z/
COMANCHE OK-
1239 AM CDT SAT APR 23 2011

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EASTERN
COMANCHE COUNTY...

LAT...LON 3488 9791 3469 9771 3454 9812 3464 9813
      3469 9809
TIME...MOT...LOC 0539Z 255DEG 16KT 3463 9805

$$

OKC051-137-230615-
/O.CON.KOUN.SV.W.0075.000000T0000Z-110423T0615Z/
GRADY OK-STEPHENS OK-
1239 AM CDT SAT APR 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR NORTHWESTERN STEPHENS AND SOUTHWESTERN GRADY COUNTIES...

AT 1239 AM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM 7 MILES WEST OF MARLOW...MOVING EAST AT 20 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF GOLF BALLS...
FLOODING IN AREAS OF POOR DRAINAGE...

* LOCATIONS IN THE WARNING INCLUDE CENTRAL HIGH...MARLOW AND RUSH
  SPRINGS.

LAT...LON 3488 9791 3469 9771 3454 9812 3464 9813
      3469 9809
TIME...MOT...LOC 0539Z 255DEG 16KT 3463 9805

$$

053 
WWUS54 KOUN 230554
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1254 AM CDT SAT APR 23 2011

OKC051-137-230615-
/O.CON.KOUN.SV.W.0075.000000T0000Z-110423T0615Z/
GRADY OK-STEPHENS OK-
1254 AM CDT SAT APR 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR NORTHERN STEPHENS AND SOUTHERN GRADY COUNTIES...

AT 1253 AM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE 
THUNDERSTORM JSUT WEST OF MARLOW...MOVING EAST AT 20 MPH. THE STORM 
IS ON A WEAKENING TREND AS IT APPROACHES MARLOW...BUT HAIL UP TO THE 
SIZE OF QUARTERS IS STILL LIKELY.

* LOCATIONS IN THE WARNING INCLUDE MARLOW.

LAT...LON 3466 9808 3473 9805 3482 9785 3469 9771
      3459 9799
TIME...MOT...LOC 0553Z 255DEG 16KT 3464 9796

$$

231 
WWUS54 KOUN 230608
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
108 AM CDT SAT APR 23 2011

OKC051-137-230618-
/O.EXP.KOUN.SV.W.0075.000000T0000Z-110423T0615Z/
GRADY OK-STEPHENS OK-
108 AM CDT SAT APR 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN STEPHENS AND SOUTHERN
GRADY COUNTIES WILL EXPIRE AT 115 AM CDT...

AS THE STORM WEAKENS...WIND GUSTS TO 40 MPH OR SO WILL BE POSSIBLE 
IN THE RUSH SPRINGS AND MARLOW AREAS.

LAT...LON 3466 9808 3473 9805 3482 9785 3469 9771
      3459 9799
TIME...MOT...LOC 0608Z 255DEG 16KT 3466 9788

$$

TAYLOR

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 23, 12:20 AM CDT, 9 minutes earlier.

Area forecast discussion, Apr 23, 12:20 AM CDT, 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1220 AM CDT SAT APR 23 2011

.AVIATION...
TSTMS CURRENTLY ACROSS SRN OK MOVING EAST. SHORT RANGE MODELS
CONTINUE TO DEVELOP MORE SHOWERS/TSTMS BACK NORTH INTO CENTRAL AND
EVEN NORTHERN OK OVERNIGHT. THUS WILL ADD TEMPO GROUPS TO
CENTRAL/NRN OK SITES FOR LATER TONIGHT. FRONT WILL SURGE BACK
SOUTHWARD LATER TONIGHT AND SAT AND SHOULD PUSH THROUGH ALL SITES BY
MIDDAY. POST FRONTAL MVFR CIGS LIKELY AT MOST SITES.

&&

.PREV DISCUSSION... /ISSUED 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, 5 hours 9 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, 11:08 PM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1108 PM CDT FRI APR 22 2011

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

1105 PM     FLASH FLOOD      2 W WALTERS             34.36N 98.34W
04/22/2011                   COTTON             OK   LAW ENFORCEMENT

            HIGHWAY 5 TWO MILES WEST OF WALTERS REPORTED TO BE UNDER
            WATER.

&&

MA

Local storm report, Apr 22, 11:19 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1119 PM CDT FRI APR 22 2011

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

1115 PM     HAIL             VANOSS                  34.77N 96.87W
04/22/2011  E1.25 INCH       PONTOTOC           OK   TRAINED SPOTTER

            HALF DOLLAR SIZED HAIL AND ESTIMATED 60 MPH WINDS IN
            VANOSS.

&&

MA

Local storm report, Apr 22, 11:31 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1131 PM CDT FRI APR 22 2011

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

1130 PM     HAIL             GERONIMO                34.48N 98.38W
04/22/2011  E2.00 INCH       COMANCHE           OK   AMATEUR RADIO

            2 INCH HAIL REPORTED IN GERONIMO.

&&

MA

Special weather statement, Apr 22, 11:34 PM CDT, 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1134 PM CDT FRI APR 22 2011

OKZ048-230500-
ATOKA OK-
1134 PM CDT FRI APR 22 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR ATOKA COUNTY.

AT 1134 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 6
MILES NORTHWEST OF DAISY TO LANE...MOVING EAST AT 35 MPH.

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

LAT...LON 3450 9567 3450 9578 3441 9577 3424 9578
      3425 9613 3462 9588 3460 9587 3460 9568
      3459 9567 3451 9566

Local storm report, Apr 23, 12:20 AM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1220 AM CDT SAT APR 23 2011

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

1130 PM     HAIL             1 E PAOLI               34.83N 97.24W
04/22/2011  E1.00 INCH       GARVIN             OK   STORM CHASER

            ONE INCH HAIL REPORTED NEAR PAOLI.

&&

MA

Local storm report, Apr 23, 12:28 AM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1228 AM CDT SAT APR 23 2011

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

1223 AM     HAIL             2 WNW BYARS             34.88N 97.09W
04/23/2011  E2.00 INCH       MCCLAIN            OK   TRAINED SPOTTER

            STORM SPOTTER REPORTS HEN EGG SIZED HAIL NEAR BYARS.

&&

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, 10:18 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, Grady, McClain, Stephens	57 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, 12:32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.