Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

April 30, 2012Choctaw County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 30, 2012, 2:44 PM CDT for Choctaw County, Oklahoma. It was in force for 46 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 30, 2012, 2:44 PM CDT (19:44 UTC)
Expired: Apr 30, 2012, 3:30 PM CDT
In force: 46 min
Issued by: NWS Tulsa, OK

County Choctaw County, OK

The radar

The Western Arkansas radar (KSRX), 196 km from the middle of the area, began a volume at 19:43 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.

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 7.7 hours before the alert went out and 242 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: 1546 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 553 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 30, 11:59 AM CDT, 2 hours 45 minutes earlier.

Area forecast discussion, Apr 30, 11:59 AM CDT, 2 hours 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1159 AM CDT MON APR 30 2012

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.

TSRA DEVELOPING LATE THIS MORNING IN SE OK/W CNTRL AR...WHICH WILL
NECESSITATE A VCTS AT MLC AND FSM THIS AFTN. CANNOT RULE OUT
DEVELOPMENT THIS AFTERNOON FURTHER NORTH...BUT THINK THAT MOST OF
IT WILL BE AFTER 00Z. MESOSCALE MODELS HINTING AT ANOTHER MCS
MOVING THROUGH NE OK/NW AR TONIGHT...SO WILL GO WITH PROB30S FOR
THIS SCENARIO AT ALL TERMINALS EXCEPT MLC/FSM. IFR CONDITIONS WILL
BE POSSIBLE...ESPECIALLY IN NE OK...DURING THE THUNDERSTORMS.
GUSTY SOUTH WINDS POSSIBLE LATE IN THE TAF PERIOD.

&&

.PREV DISCUSSION... /ISSUED 1040 AM CDT MON APR 30 2012/

..UPDATE...

DISCUSSION...

MORNING THUNDERSTORMS CONTINUE TO PUSH OFF TO THE EAST...AND WILL
LIKELY BE OUT OF THE FORECAST AREA BY 18Z. FORECAST WILL BE
UPDATED AT LEAST ONCE THIS AFTERNOON AFTER THESE STORMS HAVE
TOTALLY CLEARED THE AREA. ADDITIONAL THUNDERSTORM DEVELOPMENT THIS
AFTERNOON IS HINTED AT BY BOTH THE HRRR AND THE LOCAL WRF...MAINLY
ACROSS NORTHEAST OKLAHOMA. HAVE RETOOLED POPS TO SHOW HIGHER
VALUES NEAR THE KANSAS BORDER...TAPERING TO LOWER VALUES SOUTH OF
INTERSTATE 40.

SOME CLEARING IS OCCURRING ON THE BACKSIDE OF THE STORMS...AND IF
THIS TREND CONTINUES ACROSS THE SOUTHEASTERN HALF OF THE
AREA...FORECAST HIGHS SHOULD STILL BE REALIZED. WILL NOT CHANGE
HIGHS ATTM...BUT WILL CONTINUE TO MONITOR AND MAKE ADJUSTMENTS AS
NEEDED BEFORE ANY AFTERNOON UPDATES.

TWEAKS HAVE BEEN MADE TO OTHER ELEMENTS ACCORDING TO CURRENT
TRENDS.

PREV DISCUSSION... /ISSUED 624 AM CDT MON APR 30 2012/

AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
LINE OF THUNDERSTORMS WITH TRAILING AREA OF STRATIFORM RAIN WILL
CONTINUE TO PROGRESS EAST THIS MORNING...WILL BE ONGOING AT
MLC/FSM/FYV AT ISSUANCE TIME WITH MVFR CONDITIONS PREVAILING. ONCE
THIS CLEARS THE AREA...VFR CONDITIONS EXPECTED TO PREVAIL THROUGH
THE REST OF THE PERIOD. CONFIDENCE REGARDING ADDITIONAL
THUNDERSTORM DEVELOPMENT THIS AFTERNOON ALONG ANY OUTFLOW BOUNDARY
REMAINS TOO LOW AT THIS POINT TO INCLUDE ANY MENTION IN THE
FORECAST. SHOULD ANY STORMS OCCUR...LOCAL MVFR CONDITIONS WILL BE
LIKELY.

PREV DISCUSSION... /ISSUED 329 AM CDT MON APR 30 2012/

DISCUSSION...
A WEAKENING AREA OF SHOWERS AND THUNDERSTORMS IS PROGRESSING
SOUTHEAST ACROSS NORTHEAST OKLAHOMA EARLY THIS MORNING AND LATEST
RUNS OF THE HRRR SUGGEST THAT AT LEAST A BROKEN BAND OF SHOWERS
AND STORMS WILL MAKE IT THROUGH ALL OF EASTERN OKLAHOMA AND
NORTHWEST ARKANSAS THIS MORNING. RESIDUAL OUTFLOW BOUNDARIES AND
THE OLD FRONTAL BOUNDARY NEAR THE KANSAS AND MISSOURI BORDERS MAY
PROVIDE A FOCUS FOR RENEWED DEVELOPMENT LATER THIS AFTERNOON OR
THIS EVENING BUT BY LATER TONIGHT THE GREATEST CONVECTIVE COVERAGE
IS LIKELY TO BE TO OUR NORTH AND NORTHEAST.

WILL CONTINUE LOW POPS INTO TUESDAY BUT AFTER THAT THE CAPPING
INVERSION STRENGTHENS ENOUGH TO PRECLUDE A MENTION OF CONVECTION.
VERY WARM AND HUMID WEATHER WILL THEN PREVAIL THROUGH AT LEAST
NEXT WEEKEND WITH HIGHS APPROACHING 90 AND LOWS NEAR 70 IN MANY
PLACES.

STAYED CLOSE TO THE WARMER NAM MOS TEMPERATURES THE NEXT COUPLE
DAYS.

&&

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

SHORT TERM...22
LONG TERM....23
AVIATION...22

Hazardous weather outlook, Apr 30, 12:51 PM CDT, 1 hour 53 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1251 PM CDT MON APR 30 2012

ARZ001-002-010-011-019-020-029-OKZ049-053>076-011000-
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-
1251 PM CDT MON APR 30 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...THIS AFTERNOON.

FLASH FLOOD.
	RISK...ELEVATED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...THIS EVENING.

HEAVY RAIN.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...THIS AFTERNOON.

DISCUSSION...
SCATTERED THUNDERSTORMS SHOULD CONTINUE TO DEVELOP THIS AFTERNOON
ALONG AND AHEAD OF AN OUTFLOW BOUNDARY...POSITIONED ACROSS
SOUTHEAST OKLAHOMA AND INTO WEST CENTRAL ARKANSAS. WARM AND VERY
HUMID CONDITIONS AHEAD OF THE BOUNDARY WILL LEAD TO HIGH
INSTABILITY VALUES...SUPPORTIVE OF A LARGE HAIL THREAT. IN
ADDITION...ANY STORMS THAT ARE ABLE TO DEVELOP AND INTERACT WITH
THE BOUNDARY ITSELF WILL HAVE AN ISOLATED TORNADO POTENTIAL. THE
OVERALL TORNADO THREAT...HOWEVER...IS QUITE LOW. THESE STORMS
SHOULD DIMINISH DURING THE EVENING HOURS.

THIS EVENING AND OVERNIGHT...A THUNDERSTORM COMPLEX IS EXPECTED TO
DEVELOP IN WESTERN OKLAHOMA AND MOVE EASTWARD ACROSS NORTHEAST
OKLAHOMA AND INTO NORTHWEST ARKANSAS. THE COMPLEX WILL CONTAIN A
LIMITED LARGE HAIL AND DAMAGING WIND THREAT. FLASH FLOODING WILL
AGAIN BECOME A CONCERN...WITH HEAVY RAINS POTENTIALLY AFFECTING
AREAS THAT RECEIVED FLOODING RAINS LAST NIGHT.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
WEDNESDAY...HIGH WIND POTENTIAL.
THURSDAY THROUGH SUNDAY...NO HAZARDS.

EXTENDED DISCUSSION...
THE OVERALL POTENTIAL FOR THUNDERSTORMS WILL DECREASE
SIGNIFICANTLY BY TUESDAY AS A STATIONARY FRONT THAT HAS BEEN
OVER THE AREA FOR SEVERAL DAYS LIFTS TO THE NORTH. SOUTH WINDS
WILL BECOME STRONG TUESDAY AND WEDNESDAY WITH GUSTS OVER 30 MPH
LIKELY. VERY WARM AND HUMID WEATHER WILL PREVAIL THROUGH THE
WEEKEND.

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

In the hours before

Local storm report, Apr 30, 9:15 AM CDT, 5 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
915 AM CDT MON APR 30 2012

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

0742 PM     HAIL             2 S FAIRFAX             36.54N 96.70W
04/29/2012  E1.00 INCH       OSAGE              OK   POST OFFICE

0822 PM     HAIL             2 W RALSTON             36.50N 96.77W
04/29/2012  E1.75 INCH       PAWNEE             OK   PUBLIC

            GOLF BALL TO HALF DOLLAR SIZE HAIL VIA KJRH.

0915 PM     FUNNEL CLOUD     5 NNW WYNONA            36.61N 96.36W
04/29/2012                   OSAGE              OK   STORM CHASER

            FUNNEL CLOUD CAME 3/4 WAY DOWN TO THE GROUND.

0920 PM     HAIL             PAWHUSKA                36.67N 96.34W
04/29/2012  E1.00 INCH       OSAGE              OK   PUBLIC

0935 PM     FUNNEL CLOUD     3 E PAWHUSKA            36.67N 96.28W
04/29/2012                   OSAGE              OK   TRAINED SPOTTER

            SPOTTER LOCATED SOUTH OF PAWHUSKA, LOOKING NORTHEAST,CAN
            SEE FUNNEL CLOUD LOWERING.

1028 PM     TSTM WND DMG     1 E COPAN               36.90N 95.91W
04/29/2012                   WASHINGTON         OK   EMERGENCY MNGR

            2 FOOT WIDE TREE UP-ROOTED AT 3990 RD AND 410 RD EAST OF
            COPAN.

0845 AM     FLOOD            BURBANK                 36.69N 96.73W
04/30/2012                   OSAGE              OK   LAW ENFORCEMENT

            HIGH WATER RESCUE ONGOING

&&

DMJ

Local storm report, Apr 30, 11:14 AM CDT, 3 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1114 AM CDT MON APR 30 2012

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

0919 PM     HAIL             PAWHUSKA                36.67N 96.34W
04/29/2012  E1.00 INCH       OSAGE              OK   PUBLIC

&&

DMJ

Local storm report, Apr 30, 11:29 AM CDT, 3 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1129 AM CDT MON APR 30 2012

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

1100 PM     FLASH FLOOD      GRAINOLA                36.94N 96.65W
04/29/2012                   OSAGE              OK   PUBLIC

            SEVERAL COUNTY ROADS FLOODED NEAR AND WEST OF GRAINOLA

1200 AM     FLASH FLOOD      BIGHEART                36.85N 96.23W
04/30/2012                   OSAGE              OK   PUBLIC

            SEVERAL COUNTY ROAD FLOODED JUST NORTH OF BIGHEART.

0400 AM     FLASH FLOOD      SHIDLER                 36.78N 96.66W
04/30/2012                   OSAGE              OK   COUNTY OFFICIAL

            SEVERAL COUNTY ROADS UNDER WATER AROUND SHIDLER.

0900 AM     FLOOD            BURBANK                 36.69N 96.73W
04/30/2012                   OSAGE              OK   COUNTY OFFICIAL

            WATER OVER A BRIDGE IN BURBANK. WATER UP INTO 3 HOUSES IN
            BURBANK AREA. OCCUPANTS EVACUATED BY BOAT.

1100 AM     FLOOD            BIGHEART                36.85N 96.23W
04/30/2012                   OSAGE              OK   PARK/FOREST SRVC

            SEVERAL COUNTY ROADS STILL UNDER WATER AND IMPASSABLE
            NORTH OF BIGHEART.

1125 AM     FLOOD            FAIRFAX                 36.57N 96.70W
04/30/2012                   OSAGE              OK   NWS EMPLOYEE

            SALT CREEK OUT OF BANKS AND FLOODED AT FAIRFAX.

&&

SAA

Special weather statement, Apr 30, 2:44 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
244 PM CDT MON APR 30 2012

OKZ053-302030-
CHOCTAW OK-
244 PM CDT MON APR 30 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 330 PM CDT
FOR THE FOLLOWING COUNTY...

IN SOUTHEAST OKLAHOMA
     WESTERN CHOCTAW

AT 245 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 10 MILES SOUTH OF
UNGER...MOVING NORTHEAST AT 20 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...GAY...UNGER AND SOPER.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS STORM
WILL BE CAPABLE OF PRODUCING 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 3387 9584 3393 9591 3410 9574 3394 9553
      3392 9556 3393 9559 3390 9563 3390 9567
      3388 9569 3389 9575 3386 9577
TIME...MOT...LOC 1945Z 227DEG 17KT 3388 9580

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 7:41 PM CDT	Special Weather Statement	TSA	Osage	34 min
Apr 29, 7:52 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	38 min
Apr 29, 8:16 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	44 min
Apr 29, 8:47 PM CDT	River Flood Warning	TSA	Ottawa	5 days
Apr 29, 8:49 PM CDT	Tornado Warning	TSA	Osage	26 min
Apr 29, 9:13 PM CDT	Tornado Warning	TSA	Osage	29 min
Apr 29, 9:27 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	33 min
Apr 29, 9:48 PM CDT	Areal Flood Advisory	TSA	Nowata, Osage, Pawnee, Washington	3 hr
Apr 29, 9:58 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	47 min
Apr 29, 10:13 PM CDT	Tornado Warning	TSA	Osage, Washington	32 min
Apr 29, 10:35 PM CDT	Severe Thunderstorm Warning	TSA	Nowata	20 min
Apr 29, 10:55 PM CDT	Flash Flood Warning	TSA	Osage	4 hr
Apr 29, 11:16 PM CDT	Severe Thunderstorm Warning	TSA	Osage	25 min
Apr 29, 11:44 PM CDT	Special Weather Statement	TSA	Washington	31 min
Apr 30, 12:08 AM CDT	Special Weather Statement	TSA	Craig, Nowata	37 min
Apr 30, 12:18 AM CDT	Special Weather Statement	TSA	Osage	42 min
Apr 30, 12:41 AM CDT	Special Weather Statement	TSA	Ottawa	64 min
Apr 30, 12:47 AM CDT	Special Weather Statement	TSA	Washington	43 min
Apr 30, 1:02 AM CDT	Areal Flood Advisory	TSA	Craig, Nowata, Osage, Ottawa, Pawnee, Rogers and 1 more	3 hr
Apr 30, 2:19 AM CDT	Special Weather Statement	TSA	Osage	41 min
Apr 30, 2:55 AM CDT	Flash Flood Warning	TSA	Osage, Washington	3 hr
Apr 30, 4:06 AM CDT	Areal Flood Advisory	TSA	Craig, Creek, Delaware, Mayes, Nowata, Osage and 6 more	3 hr
Apr 30, 8:26 AM CDT	River Flood Warning	TSA	Nowata	70 hr
Apr 30, 9:15 AM CDT	River Flood Warning	TSA	Washington	23 hr
Apr 30, 9:15 AM CDT	River Flood Warning	TSA	Rogers, Tulsa	41 hr
Apr 30, 11:18 AM CDT	Areal Flood Warning	TSA	Osage, Washington	29 hr
Apr 30, 2:04 PM CDT	Flash Flood Watch	TSA	Craig, Nowata, Ottawa, Pawnee, Washington	17 hr
Apr 30, 5:33 PM CDT	Special Weather Statement	TSA	LeFlore	27 min

Nearby

Special Weather Statements in Oklahoma, 2012 Every special weather statement 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.