Special Weather Statement, NWS Tulsa, OK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
638 PM CDT TUE MAY 29 2012

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
SHOWERS AND THUNDERSTORMS DEVELOPING ACROSS NORTH CENTRAL OKLAHOMA
WILL MOVE ERRATICALLY FOR THE NEXT COUPLE HOURS BEFORE ORGANIZING
AND MOVING SOUTHEAST ACROSS EASTERN OKLAHOMA AND WESTERN ARKANSAS
LATER THIS EVENING AND OVERNIGHT. VFR CONDITIONS WILL THEN PREVAIL
LATE TONIGHT THROUGH MUCH OF WEDNESDAY...BUT SHOWERS AND
THUNDERSTORMS MAY ONCE AGAIN AFFECT THE NORTHEAST OKLAHOMA TAF
SITES PRIOR TO THE END OF THE FORECAST PERIOD.

&&

.PREV DISCUSSION... /ISSUED 255 PM CDT TUE MAY 29 2012/

DISCUSSION...

A WEAK AND RATHER DIFFUSE QUASI STATIONARY BOUNDARY STRETCHES
ACROSS NORTHERN OKLAHOMA AND INTO NORTHWEST ARKANSAS THIS
AFTERNOON. LOCAL MESOANALYSIS SHOWS AN INSTABILITY MAXIMUM AND A
WEAKENED CAP ROUGHLY ALONG AND SOUTH OF THIS BOUNDARY. CU FIELD
ACROSS FAR EASTERN OKLAHOMA AND INTO ARKANSAS IS DEVELOPING WHERE
THE CAP IS THE WEAKEST.

CURRENT THINKING IS THAT THUNDERSTORM DEVELOPMENT WILL LIKELY HOLD
OFF UNTIL THE EVENING AND OVERNIGHT HOURS...ALTHOUGH THE CHANCE OF
AFTERNOON STORMS ALONG THE AFOREMENTIONED BOUNDARY IS CERTAINLY
NOT ZERO. THE MOST LIKELY REGION FOR THUNDERSTORM DEVELOPMENT WILL
BE ACROSS WESTERN AND CENTRAL PORTIONS OF KANSAS AND
OKLAHOMA...EVENTUALLY FORMING INTO A COMPLEX OF STORMS AND MOVING
INTO EASTERN OKLAHOMA AND POSSIBLY NORTHWEST ARKANSAS TONIGHT.
PRIMARY CONCERNS WILL BE LARGE HAIL /DUE TO VERY HIGH
INSTABILITIES/ AND CERTAINLY DAMAGING THUNDERSTORM WINDS. OVERALL
TORNADO THREAT IS LOW DUE TO WEAK LOW LEVEL SHEAR...ALTHOUGH
BOUNDARIES COULD PROVIDE LOCALIZED ENHANCEMENTS. LOCAL WRF...ALONG
WITH THE ARW AND NMM RUNS...HAVE CONSISTENTLY SHOWN BOW SEGMENT
STRUCTURES IN THEIR REFLECTIVITY SOLUTIONS FOR TONIGHT.

MOST OF THE STORMS SHOULD BE MOVING OUT OF THE AREA BY 12Z
TOMORROW...WITH MUCH OF THE DAYTIME PERIOD LIKELY REMAINING DRY.
THE CHANCE OF LATE AFTERNOON STORMS IS GREATER TOMORROW THAN TODAY
OR THE LAST COUPLE OF DAYS. STORMS COULD FORM AND ENTER NORTHWEST
PARTS OF THE AREA AS EARLY AS 4 OR 5 PM...WITH MOST OF THE AREA
LIKELY TO SEE STORMS DURING THE EVENING AND OVERNIGHT. STORMS ARE
AGAIN EXPECTED TO FORM INTO A COMPLEX THAT WILL MOVE ACROSS THE
AREA...POSING MAINLY A LARGE HAIL AND DAMAGING WIND THREAT. THE
RISK OF HEAVY RAIN AND POSSIBLY LOCALIZED FLOODING IS ALSO GREATER
TOMORROW NIGHT. INCREASED LOW LEVEL SHEAR SHOULD ALSO INCREASE THE
TORNADO THREAT FOR ANY ISOLATED ACTIVITY THAT DEVELOPS DURING THE
AFTERNOON OR EARLY EVENING.

STORM CHANCES WILL TAPER FROM WEST TO EAST THURSDAY AND INTO
THURSDAY NIGHT...AS MUCH COOLER AND DRIER AIR MOVES INTO THE AREA
ON THE HEELS OF THE DEPARTING UPPER LOW. BELOW NORMAL TEMPERATURES
WILL PREVAIL FOR THE LATTER PART OF THIS WEEK...BEFORE A WARMING
TREND COMMENCES DURING THE WEEKEND AND EARLY NEXT WEEK WITH A
RETURN TO SOUTHERLY WINDS.

&&

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

&&

AVIATION...05

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
516 PM CDT TUE MAY 29 2012

ARZ001-002-010-011-019-020-029-OKZ049-053>076-301030-
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-
516 PM CDT TUE MAY 29 2012

...STRONG TO SEVERE THUNDERSTORMS POSSIBLE THIS EVENING AND OVERNIGHT...

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

.DAY ONE...THIS EVENING AND TONIGHT.
TORNADO.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...AFTER 7 PM.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...AFTER 7 PM.

HEAVY RAIN.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA.
	ONSET...AFTER 7 PM.

DISCUSSION...
A NEARLY STATIONARY SURFACE BOUNDARY WAS POSITIONED NEAR THE
OKLAHOMA AND KANSAS BORDER THIS AFTERNOON. TO THE SOUTH OF THIS
BOUNDARY...FAVORABLE INSTABILITY ALONG WITH STEEP MID LEVEL LAPSE
RATES HAVE DEVELOPED WITHIN THE STRONG DAYTIME HEATING. THESE
CONDITIONS HAVE ALLOWED FOR THUNDERSTORMS TO BEGIN DEVELOPING
ACROSS WESTERN OKLAHOMA. THESE THUNDERSTORMS WILL HAVE THE
POTENTIAL TO BECOME STRONG TO SEVERE AND MOVE INTO EASTERN
OKLAHOMA AND NORTHWEST ARKANSAS THIS EVENING AND OVERNIGHT. LARGE
HAIL AND DAMAGING WINDS WILL BE THE PRIMARY CONCERNS WITH THIS
ACTIVITY...THOUGH A LIMITED TORNADO THREAT IS POSSIBLE ACROSS
NORTHEAST OKLAHOMA DURING THE EVENING HOURS. THESE THUNDERSTORMS
ARE EXPECTED TO FORM INTO A COMPLEX OF THUNDERSTORMS OVERNIGHT
WITH MORE OF A DAMAGING WIND THREAT ACROSS SOUTHEAST OKLAHOMA AND
NORTHWEST ARKANSAS.

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

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

EXTENDED DISCUSSION...
TUESDAY NIGHT THUNDERSTORM ACTIVITY LOOKS TO BE MOVING OUT OF THE
REGION WEDNESDAY MORNING. HOWEVER...WITH THE SURFACE BOUNDARY
REMAINING OVER THE REGION...ADDITIONAL THUNDERSTORMS WITH A SEVERE
WEATHER POTENTIAL WILL BE POSSIBLE AGAIN WEDNESDAY AFTERNOON AND
NIGHT. ALL MODES OF SEVERE WEATHER COULD BE POSSIBLE WITH THIS
ACTIVITY AS THUNDERSTORMS MOVE INTO THE REGION WEDNESDAY
AFTERNOON AND FORM INTO A COMPLEX OF THUNDERSTORMS WEDNESDAY
NIGHT.

THUNDERSTORM POTENTIAL CONTINUES INTO THURSDAY AS THE SURFACE
BOUNDARY PUSHES THROUGH THE REGION AS A COLD FRONT. BEHIND THE
FRONT...COOLER AND DRIER AIR LOOKS TO MOVE INTO THE REGION FOR THE
UPCOMING WEEKEND.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
EMERGENCY MANAGEMENT OFFICIALS AND INTERESTED PERSONS SHOULD
CONTINUE TO MONITOR THE LATEST FORECASTS FOR THE POTENTIAL OF
SEVERE WEATHER WEDNESDAY AFTERNOON AND WEDNESDAY NIGHT.

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
711 PM CDT TUE MAY 29 2012

OKZ054-059-300100-
OSAGE OK-PAWNEE OK-
711 PM CDT TUE MAY 29 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 800 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     WESTERN OSAGE AND PAWNEE

AT 712 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 15 MILES WEST OF
APPERSON...MOVING EAST AT 25 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...SHIDLER...FAIRFAX...BURBANK...
APPERSON...WEBB CITY AND RALSTON.

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 3670 9706 3669 9695 3675 9689 3675 9683
      3679 9676 3683 9675 3682 9653 3641 9663
      3652 9701 3654 9698 3656 9691 3658 9690
      3659 9692 3658 9700 3659 9705 3666 9707
TIME...MOT...LOC 0012Z 280DEG 20KT 3671 9702

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
727 PM CDT TUE MAY 29 2012

OKZ059-064-300115-
CREEK OK-PAWNEE OK-
727 PM CDT TUE MAY 29 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 815 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     NORTHERN CREEK AND PAWNEE

AT 727 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES WEST OF
DRUMRIGHT...MOVING EAST AT 35 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...JENNINGS...TERLTON...BRISTOW...
DEPEW...SHAMROCK...DRUMRIGHT...OILTON...SILVER CITY AND QUAY.

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 3621 9641 3584 9621 3578 9663 3615 9663
      3615 9681 3620 9683
TIME...MOT...LOC 0027Z 269DEG 30KT 3596 9668