Severe Thunderstorm Warning 66, NWS Tulsa, OK

000 
WWUS54 KTSA 052029
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
330 PM CDT TUE APR 5 2005

OKC143-052100-
/O.CON.KTSA.SV.W.0066.000000T0000Z-050405T2100Z/
TULSA OK-
330 PM CDT TUE APR 5 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 400 PM CDT FOR TULSA
COUNTY...

AT 328 PM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL
AND DAMAGING WINDS TO 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 7 MILES NORTHWEST OF SAND SPRINGS TO 21 MILES
SOUTHWEST OF GLENPOOL...MOVING NORTHEAST AT 45 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...SAND SPRINGS...
GRAY...GLENPOOL...SPERRY...JENKS...BIXBY...TULSA...COLLINSVILLE AND
OWASSO.

THIS STORM WILL BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING
WINDS. IF NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE
LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.

LAT...LON 3616 9631 3609 9627 3607 9602 3587 9602
      3589 9581 3646 9583 3643 9600 3615 9602

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
140 PM CDT TUE APR 5 2005

.DISCUSSION...
THE CAP IS BEGINNING TO ERODE IN OUR WESTERN COUNTIES AND THE CAP
WILL BE ELIMINATED FROM WEST TO EAST WITH TIME ACROSS THE AREA AS
VERTICAL MOTION INCREASES AHEAD OF THE LARGE UPPER SYSTEM THAT IS
DIGGING SLOWLY TOWARD CENTRAL OKLAHOMA.

THUNDERSTORM DEVELOPMENT WILL OCCUR BETWEEN 2PM AND 4PM IN OUR
WESTERN COUNTIES FROM OSAGE COUNTY SOUTH TO THE RED RIVER.  DEEP
LAYER SHEAR VECTORS ARE BACKED ACROSS MOST OF THE AREA...SO A RAPID
EVOLUTION TOWARD A SQUALL LINE WITH EMBEDDED SUPERCELLS IS
EXPECTED.  THE MID-LEVEL FLOW IS LESS BACKED IN FAR SOUTHEAST
OKLAHOMA...WHICH WILL ALLOW A LONGER PERIOD OF TIME FOR SUSTAIN
DISCRETE SUPERCELLS

THE POTENTIAL REMAINS FOR AN ELEVATED CELL OR TWO TO FORM IN THE
MOIST AXIS FROM EAST TEXAS...ACROSS EXTREME SOUTHEAST OKLAHOMA AND
INTO WESTERN ARKANSAS.  ANY STORM THAT CAN DEVELOPED IN THIS AXIS
WOULD HAVE A HAIL THREAT.

LOW-LEVEL FORECAST STORM-RELATIVE HELICITY FIELDS ARE SOMEWHAT
NEGATIVE ALONG THE BACK EDGE OF THE DEEPER MOISTURE AND THEN TREND
TO POSITIVE FURTHER EAST.  THIS SUGGESTS THAT LEFT SPLIT CELLS MAY
BE FAVORED EARLY IN THE EVENT...FOLLOWED BY THE CYCLONIC SPLIT BEING
MORE FAVORED FURTHER EAST.

/8

&&

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1121 AM CDT TUE APR 5 2005

ARZ001-002-010-011-019-020-029-OKZ049-053>076-061000-
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-
943 AM CDT TUE APR 5 2005

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

...SEVERE THUNDERSTORMS EXPECTED THIS AFTERNOON AND EVENING ACROSS
   FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS...

.DAY ONE...TODAY AND TONIGHT.
TORNADO.
	RISK...ELEVATED.
        AREA....SOUTHEAST OKLAHOMA
        ONSET....AFTER 300 PM.
        AREA AT GREATEST RISK...FAR SOUTHEAST OKLAHOMA.

SEVERE THUNDERSTORM.
	RISK...SIGNIFICANT.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...AFTER 300 PM.
	AREA AT GREATEST RISK...FAR EASTERN OKLAHOMA AND
        NORTHWEST ARKANSAS.

SIGNIFICANT WINDS (NON THUNDERSTORM).
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

FIRE WEATHER DANGER.
	RISK...ELEVATED...SPREAD INDEX=60.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
        ONSET...ONGOING.
        AREA AT GREATEST RISK...NORTHEAST OKLAHOMA.

DISCUSSION...
A DRY LINE WAS MOVING INTO PORTIONS OF CENTRAL OKLAHOMA LATE THIS
MORNING WITH DEW-POINTS IN THE UPPER 50S TO AROUND 60 ACROSS
EASTERN OKLAHOMA. THE DRY LINE IS EXPECTED TO PUSH TO NEAR A
TULSA...MCALESTER LINE BY LATE AFTERNOON WITH RAPID THUNDERSTORM
DEVELOPMENT ALONG THE BOUNDARY AFTER 300 PM. PREFERRED STORM MODE
INITIALLY WILL BE SUPER-CELLULAR WITH THE THREAT FOR VERY LARGE
HAIL...DAMAGING WINDS AND TORNADOES. THE GREATEST TORNADO THREAT
WILL BE ACROSS FAR SOUTHEAST OKLAHOMA THROUGH EARLY EVENING WHERE
INSTABILITY AND LOW LEVEL MOISTURE WILL BE MAXIMIZED.

STORMS ARE EXPECTED TO BECOME MORE LINEAR BY EARLY EVENING WITH A
SEVERE CONVECTIVE LINE SWEEPING EAST THROUGH FAR EASTERN OKLAHOMA
AND NORTHWEST ARKANSAS DURING THE EVENING HOURS. THE PRIMARY THREAT
WITH THESE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS. THE MAIN
LINE OF STORMS IS EXPECTED TO SHIFT EAST OF THE AREA AROUND
MIDNIGHT. ADDITIONAL STRONG TO SEVERE STORMS HOWEVER MAY DEVELOP
ACROSS NORTHEAST OKLAHOMA OVERNIGHT...AS MID LEVEL LAPSE RATES
INCREASE...AS THE UPPER LOW APPROACHES. ANY STORMS THAT DEVELOP
AFTER MIDNIGHT COULD LIKELY PRODUCE LARGE HAIL.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTER ACTIVATION WILL BE NEEDED BY LATE AFTERNOON. EMERGENCY
MANAGEMENT PERSONNEL SHOULD PREPARE FOR A SIGNIFICANT SEVERE
WEATHER EVENT THIS AFTERNOON AND EVENING...ESPECIALLY ACROSS
FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
WEDNESDAY...SEVERE THUNDERSTORM POTENTIAL.
THURSDAY...NO HAZARDS.
FRIDAY...NO HAZARDS.
SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY...THUNDERSTORM POTENTIAL.
MONDAY...NO HAZARDS

EXTENDED DISCUSSION...
COLD AIR ALOFT ASSOCIATED WITH THE UPPER LOW WILL LIKELY PRODUCE
SCATTERED STRONG TO SEVERE THUNDERSTORMS ON WEDNESDAY WITH THE
THREAT FOR LARGE HAIL. THE NEXT CHANCE OF THUNDERSTORMS WILL BE
NEXT WEEKEND AS THE NEXT MAJOR WEATHER SYSTEM MOVES TOWARDS THE
AREA. AT THIS TIME IT APPEARS SEVERE WEATHER WILL BE POSSIBLE
WITH THIS SYSTEM.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL TABULAR AND GRAPHICAL
INFORMATION.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
236 PM CDT TUE APR 5 2005

ARZ029-OKZ049-053-073>076-060200-
SEBASTIAN AR-CHOCTAW OK-HASKELL OK-LATIMER OK-
LE FLORE OK-PITTSBURG OK-PUSHMATAHA OK-

...THE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 125 IN
EFFECT UNTIL 9 PM CDT FOR THE FOLLOWING AREA...

IN ARKANSAS THIS WATCH INCLUDES 1 COUNTY

IN WEST CENTRAL ARKANSAS

SEBASTIAN

IN OKLAHOMA THIS WATCH INCLUDES 6 COUNTIES

IN SOUTHEAST OKLAHOMA

CHOCTAW               HASKELL               LATIMER
LE FLORE              PITTSBURG             PUSHMATAHA

THIS INCLUDES THE CITIES OF...HUGO...STIGLER...FORT SMITH...
MCALESTER...ANTLERS...CLAYTON...POTEAU AND WILBURTON

ARZ001>002-010>011-019>020-OKZ054>072-060200-
BENTON AR-CARROLL AR-CRAWFORD AR-FRANKLIN AR-
MADISON AR-WASHINGTON AR-ADAIR OK-CHEROKEE OK-CRAIG OK-
CREEK OK-DELAWARE OK-MCINTOSH OK-MAYES OK-MUSKOGEE OK-
NOWATA OK-OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-
PAWNEE OK-ROGERS OK-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-

...THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
124 IN EFFECT UNTIL 9 PM CDT FOR THE FOLLOWING AREA...

IN ARKANSAS THIS WATCH INCLUDES 6 COUNTIES

IN NORTHWEST ARKANSAS

BENTON                CARROLL               CRAWFORD
MADISON               WASHINGTON

IN WEST CENTRAL ARKANSAS

FRANKLIN

IN OKLAHOMA THIS WATCH INCLUDES 19 COUNTIES

IN EAST CENTRAL OKLAHOMA

CHEROKEE              MUSKOGEE              OKFUSKEE
SEQUOYAH

IN NORTHEAST OKLAHOMA

ADAIR                 CRAIG                 CREEK
DELAWARE              MAYES                 NOWATA
OKMULGEE              OSAGE                 OTTAWA
PAWNEE                ROGERS                TULSA
WAGONER               WASHINGTON

IN SOUTHEAST OKLAHOMA

MCINTOSH

THIS INCLUDES THE CITIES OF...ROGERS...BENTONVILLE...CHECOTAH...
EUFAULA...CLAREMORE...CATOOSA...SALLISAW...OZARK...CHARLESTON...
JAY...PAWHUSKA...TAHLEQUAH...BARTLESVILLE...NOWATA...OKEMAH...
CHOUTEAU...MUSKOGEE...STILWELL...MARIETTA...WESTVILLE...
BERRYVILLE...EUREKA SPRINGS...TULSA...WAGONER...COWETA...
VAN BUREN...FAYETTEVILLE...SPRINGDALE...OKMULGEE...HENRYETTA...
PAWNEE...MIAMI...HUNTSVILLE...VINITA AND SAPULPA