Severe Thunderstorm Warning 89, NWS Tulsa, OK

AREA FORECAST DISCUSSION FOR EASTERN OKLAHOMA
NATIONAL WEATHER SERVICE TULSA OK
1000 AM CDT MON APR 11 1994

AM GOING TO EXTEND THE FLASH FLOOD WATCH FURTHER SOUTH FOR TODAY TO
INCLUDE MUCH OF NORTH EAST AND EAST-CENTRAL OKLAHOMA AS SHOWERS AND
STORMS CONTINUE TO TRAIN OVER THE AREA.

SURFACE LOW WAS OVER SOUTH-CENTRAL OK THIS MORNING WITH WARM FRONT
EXTENDING NORTHEAST OF THE LOW INTO NORTHEAST OKLAHOMA.  LATEST 12Z
ETAMODEL GUIDANCE SUGGESTS THIS LOW WILL MOVE INTO NORTHEAST OK NEAR
BARTLESVILLE BY 00Z THIS EVENING.  PRESSURE FALLS NOTED OVER NORTHERN
SECTIONS OF THE STATE WITH RISES OCCURRING OVER NC TEXAS ALSO SEEM TO
SUGGEST THAT THE LOW WILL MOVE NORTHEASTWARD INTO NE OKLAHOMA.  WITH THE
FRONT PROGGED BY THE MODELS TO SHIFT NORTH THIS AFT AND WITH TEMPS
ALREADY IN THE 70S OVR SRN SCTNS...HV DECIDED TO UP TEMPS SOME OVR THE
SRN ZONES.

100 KT JET MAX FROM SRN NM INTO W TX WL ROTATE AROUND UPPER LOW OVER
SOURTHERN COLORADO AND PLACE NRN SCTNS OF OKLAHOMA IN THE UPPER LEVEL
DIVERGENT-LEFT FRONT QUADRANT OF JET THIS AFTERNOON.  WITH PLENTY OF LOW
LEVEL MOISTURE AND INSTABILITY IN PLACE...SHOWERS AND STORMS WILL BE
LIKELY WITH LOCALLY HEAVY RAINS AND SEVERE WEATHER.

FLASH FLOOD WATCHES MAY NEED TO BE EXTENDED INTO SOUTHEAST OKLAHOMA FOR
TONIGHT AS SHOWERS AND THUNDERSTORMS OVERSPREAD THAT SECTION OF THE
STATE.

...16...

.TUL...FLASH FLOOD WATCH TDY ZNS 54>71.

OKZ055-070-111700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1105 AM CDT MON APR 11 1994

...SEVERE THUNDERSTORM WARNING IN EFFECT FOR NORTHERN OKMULGEE COUNTY...

...STRONG THUNDERSTORM MOVING ACROSS THE CITY OF TULSA...

AT 1100 AM...RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES NORTHEAST OF
BEGGS. DIME SIZE HAIL AND WIND GUSTS TO 60 MPH CAN BE EXPECTED OVER
NORTHERN OKMULGEE COUNTY AS THIS STORM MOVES NORTHEAST AT 35 MILES AN
HOUR.

A STRONG THUNDERSTORM WITH VERY HEAVY RAIN WAS MOVING ACROSS THE CITY OF
TULSA. THE HEAVIEST RAIN AT 1100 AM WAS INDICATED OVER THE SOUTHEAST
PART OF THE CITY NEAR BROKEN ARROW. SOME FLOODING OF ROADWAYS AND LOW
LYING AREAS CAN BE EXPECTED AS THE VERY HEAVY RAIN MOVES ACROSS THE
CITY. THIS STORM WAS MOVING NORTHEAST AT 35 MILES AN HOUR.

ANOTHER STRONG THUNDERSTORM WAS OVER CENTRAL CHEROKEE COUNTY JUST WEST
OF TAHLEQUAH. THIS STORM WILL PRODUCE SOME BRIEF GUSTY WINDS AND PEA
SIZE HAIL IN TAHLEQUAH BETWEEN 11 AM AND 1130 AM. MOVEMENT WAS NORTHEAST
AT 35 MILES AN HOUR.

STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL RADIO OR TELEVISION FOR
LATER STATEMENTS AND POSSIBLE WARNINGS.

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1 PM FOR MOST OF
EASTERN OKLAHOMA...

OKZ055-071-111745-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1144 AM CDT MON APR 11 1994

...VERY HEAVY RAINS ACROSS PARTS OF NORTHEAST OKLAHOMA...

NUMEROUS SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAINS...
CONTINUE TO MOVE ACROSS NORTHEAST OKLAHOMA THIS MORNING. AT 1140 AM...
THE NATIONAL WEATHER SERVICE RADAR IN TULSA SHOWED A LARGE AREA OF
SHOWERS AND THUNDERSTORMS...EAST AND NORTH OF A LINE FROM PAWHUSKA TO
TULSA TO CHECOTAH TO STILWELL.

THE HEAVIEST RAINS WERE IN A 10 MILE WIDE BAND OF STRONG THUNDERSTORM
WHICH EXTENDED FROM CHELSEA TO OKAY AT 1140 AM. MOVEMENT WAS NORTHEAST
AT 45 MILES AN HOUR.

THE HEAVY RAINS MAY CAUSE SOME BRIEF FLOODING PROBLEMS ACROSS PARTS OF
NORTHEAST OKLAHOMA LATE THIS MORNING AND EARLY THIS AFTERNOON. THE
COUNTIES MOST LIKELY TO EXPERIENCE HEAVY RAINS AND MINOR FLOODING ARE
EASTERN MAYES...NORTHERN CHEROKEE...OTTAWA...DELAWARE...ADAIR AND
SOUTHEAST CRAIG COUNTIES.

THE CURRENT AREA OF SHOWERS AND THUNDERSTORMS WILL MOVE OUT OF EASTERN
OKLAHOMA BY AROUND 100 PM...BUT ADDITIONAL SHOWERS AND THUNDERSTORMS
ARE EXPECTED TO DEVELOP OVER EASTERN OKLAHOMA BY EARLY AFTERNOON.

...A FLASH FLOOD WATCH IS IN EFFECT FO.R MOST OF EAST CENTRAL AND
NORTHEAST OKLAHOMA THIS AFTERNOON...

OKC131-143-111915-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
120 PM CDT MON APR 11 1994

...STRONG THUNDERSTORM OVER TULSA...

A STRENGTHENING THUNDERSTORM WAS OVER TULSA EARLY THIS AFTERNOON.
AT 120 AM...THE NATIONAL WEATHER SERVICE RADAR IN TULSA SHOWED THE STORM
TO BE CENTERED JUST NORTHEAST OF DOWNTOWN TULSA. PEA SIZE HAIL AND WINDS
UP TO 50 MPH ARE POSSIBLE WITH THIS STORM.

MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR.8

IF THIS STORM CONTINUES TO STRENGTHEN...A SEVERE THUNDERSTORM WARNING
MAY BE REQUIRED.

OKC035-105-131-111945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
143 PM CDT MON APR 11 1994

...HEAVY DOWNPOURS IN PARTS OF NORTHEAST OKLAHOMA...

AT 140 PM...A CLUSTER OF THUNDERSTORMS WAS EXITING THE TULSA
METROPOLITAN AREA AND MOVING INTO NORTHERN ROGERS COUNTY.  THESE STORMS
WERE PRODUCING HEAVY DOWNPOURS AND MAY PRODUCE SMALL HAIL.  EARLIER
RAINFALL ACROSS NORTHERN ROGERS...SOUTHERN NOWATA...AND MOST OF CRAIG
COUNTIES HAS SATURATED THE GROUND.  ADDITIONAL HEAVY DOWNPOURS MAY CAUSE
FLOODING.  PEOPLE IN THOSE COUNTIES WHERE HEAVY RAINS HAD OCCURRED AND
PEOPLE LIVING IN FLOOD PRONE AREAS SHOULD BE ALERT FOR POSSIBLE FLOODING
IF THE CLUSTER OF THUNDERSTORMS MOVE INTO TvHE AREA.

OKZ054>077-121200-

EASTERN OKLAHOMA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
145 PM CDT MON APR 11 1994

...MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT
   FOR MUCH OF EASTERN OKLAHOMA...

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT FOR A LARGE PART OF EASTERN OKLAHOMA.  THE AREA INCLUDES
THAT PART OF EASTERN OKLAHOMA SOUTH AND EAST OF INTERSTATE 44.

THERE IS ALSO A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR THE
REMAINDER OF EASTERN OKLAHOMA...INCLUDING THOSE COUNTIES NORTH OF
INTERSTATE 44.

AT 1 PM...A STATIONARY FRONT EXTENDED FROM NORTHERN ARKANSAS ACROSS
EASTERN OKLAHOMA TO NEAR SEMINOLE.  A COLD FRONT EXTENDED SOUTHWARD
TO NEAR ARDMORE.  MOIST SOUTHERLY WINDS WILL CONTINUE TO PUSH
UNSTABLE AIR NORTH OF THE STATIONARY FRONT...RESULTING IN
STRONG...AND POSSIBLY SEVERE THUNDERSTORMS.

FARTHER SOUTH...THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND
AHEAD OF THE COLD FRONT AND MOVE RAPIDLY NORTHEASTWARD.  WARM
TEMPERATURES AND HIGH HUMIDITIES EAST OF THE COLD FRONT...AND SOUTH
OF THE STATIONARY FRONT...WILL PROVIDE SUFFICIENT CONDITIONS FOR
THE DEVELOPMENT OF STRONG TO SEVERE THUNDERSTORMS IN THAT AREA.  IN
ADDITION...STRONG WINDS ALOFT WILL PROVIDE FAVORABLE CONDITIONS FOR
POSSIBLE TORNADO DEVELOPMENT FROM A FEW OF THE STRONGEST
THUNDERSTORMS.

THE MAIN THREAT FOR SEVERE WEATHER NORTH OF INTERSTATE 44 WILL BE
LARGE HAIL...ALTHOUGH DAMAGING WINDS WILL BE POSSIBLE.  SOUTH OF
INTERSTATE 44...LARGE HAIL AND DAMAGING WINDS WILL ALSO BE
POSSIBLE.  HOWEVER...CONDITIONS  WILL ALSO BE FAVORABLE FOR THE
DEVELOPMENT OF TORNADOES FROM THE STRONGEST THUNDERSTORMS...DUE TO
STRONG WINDS ALOFT.

IF SPOTTERS HAVE NOT ALREADY BEEN ACTIVATED...THEY SHOULD CLOSELY
MONITOR WEATHER CONDITIONS FOR POSSIBLE ACTIVATION LATER THIS
AFTERNOON AND EARLY TONIGHT.

OKC035-105-113-131-143-112100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
303 PM CDT MON APR 11 1994

...THUNDERSTORM CLUSTER MOVING TOWARDS KANSAS BORDER...

AT 258 PM...A CLUSTER OF STRONG THUNDERSTORMS CONTINUE OVER PARTS OF
NORTHEAST OKLAHOMA.  THE STRONGEST STORM WAS INDICATED IN NORTHERN CRAIG
COUNTY MOVING NORTHEAST AROUND 40 MPH.  THIS STORM WILL PRODUCE HEAVY
DOWNPOURS AND POSSIBLY SMALL HAIL.  SO FAR...NO REPORTS HAVE BEEN
RECEIVED OF LARGE HAIL FROM THIS STORM CLUSTER.  THE STORM HAS WEAKENED
SLIGHTLY DURING THE PAST 15 MINUTES.

OTHER LESS INTENSE THUNDERSTORMS CONTINUE OVER PARTS OF NORTHEAST
OKLAHOMA.  SOME OF THESE STORMS WILL TRACK OVER AREAS WHICH HAVER ALREADY
RECEIVED HEAVY RAINFALL AND WHERE THE GROUND IS SATURATED.  FLASH FLOOD
WARNINGS REMAIN IN EFFECT FOR PARTS OF OSAGE..TULSA...ROGERS...NOWATA
AND CRAIG COUNTIES.