WW 349 SEVERE TSTM OK 040305Z – 040900Z
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 349
NWS STORM PREDICTION CENTER NORMAN OK
1005 PM CDT SUN JUN 3 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN AND WEST CENTRAL OKLAHOMA
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1005 PM UNTIL
400 AM CDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH
NORTHEAST OF CLINTON OKLAHOMA TO 35 MILES SOUTH SOUTHWEST OF FORT
SILL OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 347. WATCH NUMBER 347 WILL NOT BE IN EFFECT
AFTER 1005 PM CDT. CONTINUE...WW 348...
DISCUSSION...TSTMS/SUPERCELLS FAILED TO BECOME SUSTAINED IN NW OK
EARLIER THIS EVE...POSSIBLY AS A RESULT OF RELATIVELY WEAK LOW LVL
CONFLUENCE AND THE ABSENCE OF A WELL-DEFINED W-E BOUNDARY. STORMS
HAVE...HOWEVER...RECENTLY FORMED IN THE REGION...MOST LIKELY ALONG
WRN EDGE OF STRENGTHENING SLY LLJ. THIS ACTIVITY MAY YET GROW INTO
AN MCS AS THE STORMS DEVELOP FARTHER E AND TAP INCREASINGLY RICH LOW
LVL MOISTURE IN CNTRL/ERN PART OF STATE.
AREA VWP DATA SUGGEST THAT...IN CONTRAST TO STRENGTHENING
LLJ...MID/UPR LVL FLOW LIKELY WILL REMAIN WEAK OR FURTHER WEAKEN AS
AXIS OF UPR IMPULSE NOW OVER SW KS/NW OK CONTINUES ESEWD. WHILE
WEAKENING MID/UPR LVL FLOW MAY LIMIT STORM
ORGANIZATION/SUSTENANCE...STEEP LAPSE RATES ABOVE THE COOLING
BOUNDARY LAYER AND INCREASING MOISTURE WITH EWD EXTENT MAY SUPPORT
LOCALLY DMGG WIND/SVR HAIL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 31020.
...CORFIDI
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0349.html
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