Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 337, NWS Tulsa, OK

May 23, 2011Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 23, 2011, 5:49 AM CDT for Osage County, Oklahoma. It was in force for 26 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: May 23, 2011, 5:49 AM CDT (10:49 UTC)
Expired: May 23, 2011, 6:15 AM CDT
In force: 26 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Osage County, OK

The radar

The Wichita radar (KICT), 107 km from the middle of the area, began a volume at 10:51 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 nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 10.8 hours before the alert went out and 88 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: 145 J/kg
Mixed-layer CIN: -231 J/kg
Mixed-layer LCL: 2812 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 54 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.

767 
WUUS54 KTSA 231049
SVRTSA
OKC113-231115-
/O.NEW.KTSA.SV.W.0337.110523T1049Z-110523T1115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
549 AM CDT MON MAY 23 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN OSAGE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 615 AM CDT

* AT 544 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES NORTHEAST
  OF GRAINOLA...MOVING NORTHEAST AT 30 MPH.

  STORM HAZARDS INCLUDE...
  HALF DOLLAR SIZE HAIL...
  
* THE A SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3700 9664 3700 9622 3683 9667 3695 9674
      3701 9664
TIME...MOT...LOC 1049Z 241DEG 28KT 3698 9654

$$

1 follow-up statement

840 
WWUS54 KTSA 231105
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
605 AM CDT MON MAY 23 2011

OKC113-231115-
/O.CON.KTSA.SV.W.0337.000000T0000Z-110523T1115Z/
OSAGE OK-
605 AM CDT MON MAY 23 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR
NORTHERN OSAGE COUNTY...

AT 602 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTHERN OSAGE
COUNTY...MOVING NORTHEAST AT 30 MPH.

STORM HAZARDS INCLUDE...
HALF DOLLAR SIZE HAIL...

THE WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3691 9653 3696 9665 3701 9664 3700 9664
      3700 9622
TIME...MOT...LOC 1105Z 241DEG 28KT 3698 9652

$$

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 23, 4:06 AM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, May 23, 4:06 AM CDT, 1 hour 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
406 AM CDT MON MAY 23 2011

.DISCUSSION...
VOLATILE LATE SPRING PATTERN WILL CONTINUE FOR THE NEXT 72 HOURS
OR SO WITH A MOIST LOW LEVEL AIRMASS PERSISTING AND A DISTURBED
SOUTHWEST FLOW ALOFT AHEAD OF A POTENT UPPER LEVEL SYSTEM...WHICH
WILL BRING POTENTIAL FOR A SIGNIFICANT SEVERE WEATHER OUTBREAK
TUESDAY. SEVERE WEATHER OUTLOOK FOR TODAY IS COMPLICATED BY
POTENTIAL FOR WIDESPREAD CONVECTION WHICH COULD ULTIMATELY AFFECT
THE AVAILABLE INSTABILITY.

SIGNIFICANTLY BACKED MID LEVEL FLOW SHOWING UP ON PROFILER/88D
NETWORK INDICATING A WAVE MOVING OUT OF THE SOUTHERN ROCKIES
EARLY THIS MORNING...WHILE AT THE SFC A BOUNDARY FROM LEFT BY
STORMS YESTERDAY DRAPED ACROSS EASTERN OK NEAR I-40. ALL QUIET SO
FAR BUT WOULD EXPECT TO SEE ELEVATED STORMS INCREASE IN NEXT FEW
HOURS ALONG AND NORTH OF THIS BOUNDARY. BOTH 06Z NAM AND RECENT
RUNS OF HRRR ALSO INDICATE STORM CLUSTERS BREAKING OUT DURING THE
MORNING SOUTH OF THE BOUNDARY AS ABOVE MENTIONED WAVE LIFTS NE
ACROSS THE AREA. WHILE THIS ACTIVITY WOULD POSE SOME SEVERE THREAT
A MORE SUBSTANTIAL THREAT COULD DEVELOP LATE THIS AFTERNOON...
PROVIDED MORNING STORMS DO NOT WORK OVER THE ATMOSPHERE TOO
MUCH...AS ADDITIONAL STORMS FORM NEAR DRY LINE OVER FAR WESTERN OK
AND ON CONVECTIVE BOUNDARIES. NAM STILL FORECASTS CAPE VALUES
AROUND 5000 J/KG FROM SW OK TOWARD US 75 CORRIDOR BY AFTERNOON
WITH ANY STORMS IN THIS ENVIRONMENT QUICKLY BECOMING SEVERE WITH
VERY LARGE HAIL AND ISOLATED TORNADOES...ESPECIALLY NEAR ANY
PERSISTENT SFC BOUNDARIES.

ONE SOLUTION THAT HAS REMAINED CONSISTENT IS FOR STRONG UPPER WAVE
NOW APPROACHING CALIFORNIA COAST TO MOVE ACROSS SOUTHWEST AND
BECOME NEGATIVELY TILTED TUESDAY AFTERNOON...WHILE DRY LINE PUSHES
INTO CENTRAL OK AND SFC BOUNDARY LINGERS ACROSS NE OKLAHOMA AND NW
ARKANSAS. FORECAST INSTABILITY AND DEEP LAYER SHEAR CONTINUE TO
SUGGEST A MAJOR OUTBREAK OF SEVERE WEATHER...INCLUDING STRONG
TORNADOES...LATE TUESDAY AFTERNOON. STORMS ULTIMATELY MAY GROW
INTO A SEVERE SQUALL LINE TUESDAY NIGHT.

UPPER LOW WILL SLOWLY MOVE ACROSS KANSAS WEDNESDAY WITH DEEPER
MOISTURE BEING PUSHED EAST...THOUGH SOME THREAT OF SEVERE WEATHER
POSSIBLE OVER FAR EASTERN AREAS. DRIER AND MORE STABLE AIRMASS
FINALLY SPREADS OVER THE AREA BY THURSDAY FOR A RESPITE FROM THE
ACTIVE WEATHER...WITH BELOW NORMAL TEMPS. WILL CONTINUE WITH A DRY
FORECAST FOR THE HOLIDAY WEEKEND AS MODEL DIFFERENCES ABOUND.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   84  69  86  67 /  60  60  20  60
FSM   82  68  87  69 /  60  60  20  50
MLC   82  71  84  70 /  40  30  20  50
BVO   84  67  84  66 /  60  60  30  70
FYV   77  66  82  69 /  70  70  30  50
BYV   78  63  81  68 /  70  70  40  50
MKO   80  68  85  68 /  60  50  20  60
MIO   84  66  81  68 /  70  70  40  70
F10   81  69  85  68 /  50  40  20  50
HHW   85  70  87  69 /  40  30  10  40

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

SHORT TERM...30
LONG TERM....14

Hazardous weather outlook, May 22, 5:04 PM CDT, 12 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
504 PM CDT SUN MAY 22 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-231000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
504 PM CDT SUN MAY 22 2011

...SEVERE THUNDERSTORMS POSSIBLE THIS EVENING... INCLUDING THE
CHANCE FOR TORNADOES AND VERY LARGE HAIL...

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TODAY AND TONIGHT.
TORNADO.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ANY TIME.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ANY TIME.

FLASH FLOOD.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...TONIGHT.

SIGNIFICANT WINDS.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

DISCUSSION...
STRONG THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG A DRYLINE
SITUATED ALONG THE WESTERN PERIPHERY OF THE FORECAST AREA. WITH A
VERY MOIST AND UNSTABLE AIRMASS IN PLACE... THIS ACTIVITY SHOULD
QUICKLY BECOME SEVERE AND MOVE NORTHEASTWARD ACROSS THE REGION.
THERE WILL BE A POSSIBILITY FOR TORNADOES AND VERY LARGE HAIL.

AS STORMS EVOLVE OVERNIGHT... THE THREAT WILL SLOWLY TRANSITION TO MORE
OF A STRAIGHT LINE WIND... LARGE HAIL...AND HEAVY RAINFALL EVENT.
FLASH FLOODING POTENTIAL WILL INCREASE OVERNIGHT.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
ACTIVATION OF THE REGIONAL SPOTTER NETWORK LIKELY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
MONDAY...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL...HEAVY RAIN POTENTIAL.
TUESDAY...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
WEDNESDAY...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
THURSDAY...NO HAZARDS.
FRIDAY...NO HAZARDS.
SATURDAY...NO HAZARDS.

EXTENDED DISCUSSION...
A LOW AMPLITUDE SHORTWAVE TROUGH IS EXPECTED TO MOVE NORTHEAST
ACROSS THE REGION ON MONDAY. THIS WILL COMBINE WITH THE MOIST AND
VERY UNSTABLE AIRMASS IN PLACE TO GENERATE WIDESPREAD THUNDERSTORM
ACTIVITY ALONG THE DRYLINE AND A LINGERING FRONTAL BOUNDARY NEAR
THE KANSAS BORDER. DISCRETE STORMS WILL POSE THE RISK OF VERY
LARGE HAIL AND POSSIBLY ISOLATED TORNADOES. STORMS WILL EVENTUALLY CONGEAL
INTO CLUSTERS WITH DAMAGING WIND AND LARGE HAIL POTENTIAL BY
MONDAY NIGHT... MAINLY OVER NORTHEAST OKLAHOMA. FLASH FLOODING
WILL CONTINUE TO BE A CONCERN...ESPECIALLY IF STORMS TRACK OVER
AREAS AFFECTED BY PREVIOUS ROUNDS OF STORMS.

A SIGNIFICANT PIECE OF SHORTWAVE TROUGH ENERGY IS EXPECTED TO
EJECT INTO THE SOUTHERN PLAINS ON TUESDAY. THUNDERSTORM
DEVELOPMENT IS LIKELY ALONG THE DRYLINE AND SURGING FRONT TUESDAY
NIGHT INTO WEDNESDAY.  SEVERE WEATHER POTENTIAL IS HIGH... AS A MOIST
AND UNSTABLE AIRMASS REMAINS IN PLACE... ALONG WITH AMPLE WIND SHEAR ON
THE SOUTH SIDE OF THE SHORTWAVE TROUGH.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
EMERGENCY MANAGERS WILL NEED TO MONITOR CONDITIONS AND FORECASTS
CLOSELY OVER THE NEXT SEVERAL DAYS... AS A PROLONGED PERIOD OF SEVERE
WEATHER IS LIKELY.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Local storm report, May 23, 12:23 AM CDT, 5 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1223 AM CDT MON MAY 23 2011

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

1045 PM     HAIL             2 SE CATOOSA            36.17N 95.72W
05/22/2011  M2.00 INCH       ROGERS             OK   NWS EMPLOYEE

&&

PBS

Special weather statement, May 23, 12:29 AM CDT, 5 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1229 AM CDT MON MAY 23 2011

ARZ001-002-011-230600-
BENTON AR-CARROLL AR-MADISON AR-
1229 AM CDT MON MAY 23 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 100 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     NORTHEASTERN BENTON...CARROLL AND NORTHERN MADISON

AT 1228 AM CDT...STRONG THUNDERSTORMS WERE LOCATED OVER CARROLL
COUNTY AND EASTERN BENTON COUNTY...MOVING NORTHEAST AT 25 MPH. SOME
LOCATIONS THAT WILL BE AFFECTED BY THESE STORMS
INCLUDE...BERRYVILLE...EUREKA SPRINGS...GREEN FOREST...
CARROLLTON...BEAVER LAKE...URBANETTE...BEAVER AND ROCKHOUSE.

THESE STORMS WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL AND WIND
GUSTS TO 40 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE
THE SIGNIFICANT WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3625 9408 3650 9406 3650 9330 3628 9329
      3625 9330
TIME...MOT...LOC 0528Z 219DEG 29KT 3637 9395 3635 9331

Local storm report, May 23, 1:05 AM CDT, 4 hours 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
105 AM CDT MON MAY 23 2011

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

1246 AM     FLASH FLOOD      PEA RIDGE               36.45N 94.11W
05/23/2011                   BENTON             AR   BROADCAST MEDIA

            HWY 94 AND WILDFLOWER NEAR PEA RIDGE UNDER
            WATER...RELAYED BY KNWA.

&&

LACY

Special weather statement, May 23, 1:05 AM CDT, 4 hours 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
105 AM CDT MON MAY 23 2011

ARZ002-230630-
CARROLL AR-
105 AM CDT MON MAY 23 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 130 AM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHWEST ARKANSAS
     NORTHERN CARROLL

AT 106 AM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER OAK HILL...
MOVING EAST AT 40 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THIS
STORM INCLUDE...BLUE EYE...OAK GROVE...OAK HILL...PLEASANT RIDGE...
DENVER...BERRYVILLE...EUREKA SPRINGS...URBANETTE...GRANDVIEW AND
BEAVER.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL AND WIND
GUSTS TO 50 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE
THE SIGNIFICANT WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3638 9378 3650 9377 3650 9330 3649 9329
      3632 9330
TIME...MOT...LOC 0606Z 275DEG 34KT 3646 9366

Local storm report, May 23, 1:21 AM CDT, 4 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
121 AM CDT MON MAY 23 2011

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

0840 PM     TORNADO          4 W WEST SILOAM SPRINGS 36.18N 94.65W
05/22/2011                   DELAWARE           OK   PUBLIC

            MOBILE HOME PARK DESTROYED. SIX TRAILERS 1 MILE ENE OF
            DRIPPING SPRINGS OK. PROBABLE TORNADO.

&&

SAA

Special weather statement, May 23, 5:42 AM CDT, 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
542 AM CDT MON MAY 23 2011

OKZ054-231115-
OSAGE OK-
542 AM CDT MON MAY 23 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 615 AM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     NORTHERN OSAGE

AT 543 AM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER GRAINOLA...
MOVING NORTHEAST AT 40 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY
THIS STORM INCLUDE...SHIDLER...WEBB CITY...FORAKER AND GRAINOLA.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL.

LAT...LON 3701 9608 3700 9604 3676 9670 3685 9677
      3686 9676 3700 9676 3701 9675
TIME...MOT...LOC 1043Z 221DEG 34KT 3698 9660

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:00 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee	45 min
May 22, 7:13 PM CDT	Tornado Warning	TSA	Adair, Cherokee, Delaware, Mayes	62 min
May 22, 7:26 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	49 min
May 22, 7:38 PM CDT	Areal Flood Advisory	TSA	Delaware, Ottawa	112 min
May 22, 7:39 PM CDT	Flash Flood Warning	TSA	Delaware	4 hr
May 22, 7:39 PM CDT	Tornado Warning	TSA	Delaware, Ottawa	36 min
May 22, 7:46 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee	29 min
May 22, 7:51 PM CDT	Areal Flood Advisory	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee	84 min
May 22, 7:53 PM CDT	Special Weather Statement	TSA	Cherokee	37 min
May 22, 8:09 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Delaware	66 min
May 22, 8:09 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Wagoner	51 min
May 22, 8:16 PM CDT	Tornado Warning	TSA	Adair, Cherokee, Delaware	29 min
May 22, 8:19 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Wagoner	30 min
May 22, 8:20 PM CDT	Tornado Warning	TSA	Delaware	55 min
May 22, 8:32 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	43 min
May 22, 8:41 PM CDT	Special Weather Statement	TSA	Choctaw	34 min
May 22, 8:45 PM CDT	Tornado Warning	TSA	Delaware	45 min
May 22, 9:01 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	44 min
May 22, 9:15 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa, Rogers	60 min
May 22, 9:29 PM CDT	Special Weather Statement	TSA	Latimer	31 min
May 22, 9:35 PM CDT	Special Weather Statement	TSA	LeFlore	25 min
May 22, 9:38 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pittsburg	30 min
May 22, 10:12 PM CDT	Special Weather Statement	TSA	Creek, Tulsa	33 min
May 22, 10:14 PM CDT	Special Weather Statement	TSA	Delaware	31 min
May 22, 10:30 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	45 min
May 22, 10:37 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Rogers, Tulsa	22 min
May 22, 10:39 PM CDT	Special Weather Statement	TSA	Delaware	36 min
May 22, 10:50 PM CDT	Severe Thunderstorm Warning	TSA	Adair, LeFlore, Sequoyah	40 min
May 22, 10:55 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	35 min
May 22, 11:01 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	59 min
May 22, 11:01 PM CDT	Tornado Warning	TSA	Delaware	29 min
May 22, 11:10 PM CDT	Flash Flood Warning	TSA	Delaware	6 hr
May 22, 11:12 PM CDT	Special Weather Statement	TSA	Mayes, Rogers	33 min
May 23, 5:07 AM CDT	Areal Flood Warning	TSA	Delaware	4 hr
May 23, 5:42 AM CDT	Special Weather Statement	TSA	Osage	33 min
May 23, 6:20 AM CDT	Severe Thunderstorm Warning	TSA	Osage	25 min
May 23, 6:50 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	25 min
May 23, 7:12 AM CDT	Special Weather Statement	TSA	Osage	33 min
May 23, 7:16 AM CDT	Special Weather Statement	TSA	Nowata	29 min
May 23, 7:25 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	50 min
May 23, 7:38 AM CDT	Special Weather Statement	TSA	Washington	37 min
May 23, 7:53 AM CDT	Special Weather Statement	TSA	Washington	37 min
May 23, 8:06 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	39 min
May 23, 8:16 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	44 min
May 23, 8:48 AM CDT	Special Weather Statement	TSA	Pushmataha	27 min
May 23, 8:49 AM CDT	Special Weather Statement	TSA	Nowata	26 min
May 23, 8:57 AM CDT	Special Weather Statement	TSA	Craig, Ottawa	33 min
May 23, 9:01 AM CDT	Special Weather Statement	TSA	Pushmataha	44 min
May 23, 9:11 AM CDT	Special Weather Statement	TSA	Pushmataha	34 min
May 23, 9:15 AM CDT	Areal Flood Advisory	TSA	Craig, Delaware, Nowata, Ottawa	2 hr
May 23, 9:26 AM CDT	Special Weather Statement	TSA	Craig	34 min
May 23, 9:29 AM CDT	Special Weather Statement	TSA	Ottawa	31 min
May 23, 9:36 AM CDT	Special Weather Statement	TSA	Choctaw	39 min
May 23, 9:56 AM CDT	Flash Flood Warning	TSA	Craig, Delaware, Nowata, Ottawa	4 hr
May 23, 10:00 AM CDT	Special Weather Statement	TSA	Craig	30 min
May 23, 10:31 AM CDT	Special Weather Statement	TSA	Craig	29 min
May 23, 10:45 AM CDT	Areal Flood Warning	TSA	Nowata	6 hr
May 23, 11:31 AM CDT	Special Weather Statement	TSA	Craig	29 min
May 23, 11:58 AM CDT	Special Weather Statement	TSA	Craig	32 min
May 23, 12:15 PM CDT	Special Weather Statement	TSA	Adair	30 min
May 23, 1:38 PM CDT	Flash Flood Warning	TSA	Craig, Delaware, Nowata, Ottawa, Rogers	6 hr
May 23, 1:40 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	35 min
May 23, 2:08 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	49 min
May 23, 2:10 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	35 min
May 23, 2:32 PM CDT	River Flood Warning	TSA	Ottawa	42 hr
May 23, 2:37 PM CDT	River Flood Warning	TSA	Adair	60 hr
May 23, 2:37 PM CDT	River Flood Warning	TSA	Cherokee	3 days
May 23, 2:41 PM CDT	River Flood Advisory	TSA	Cherokee, Delaware	54 hr
May 23, 3:20 PM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more	34 hr
May 23, 4:24 PM CDT	Areal Flood Warning	TSA	Nowata	6 hr
May 23, 4:52 PM CDT	Severe Thunderstorm Warning	TSA	Osage	53 min
May 23, 5:06 PM CDT	Tornado Warning	TSA	Osage	24 min
May 23, 5:29 PM CDT	Tornado Warning	TSA	Osage, Pawnee	31 min
May 23, 5:41 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	32 min
May 23, 5:55 PM CDT	Tornado Warning	TSA	Osage, Pawnee	50 min
May 23, 6:47 PM CDT	Areal Flood Advisory	TSA	Washington	118 min
May 23, 6:59 PM CDT	Special Weather Statement	TSA	Delaware, Mayes, Wagoner	46 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.