

195 

WWUS20 KWNS 150013

SEL7

SPC WW 150013

OKZ000-150600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 107

NWS STORM PREDICTION CENTER NORMAN OK

710 PM CDT SUN APR 14 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH CENTRAL AND NORTHEAST OKLAHOMA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 710 PM UNTIL

100 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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF

BARTLESVILLE OKLAHOMA TO 50 MILES SOUTHWEST OF TULSA OKLAHOMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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...CONTINUE...WW 106...



DISCUSSION...ISOLD TO WDLY SCTD TSTMS EXPECTED THIS EVE ACROSS NORTH

CNTRL/NE OK ALONG AND AHEAD OF COLD FRONT MOVING ESE ACROSS REGION.

LATEST SFC ANALYSIS CONFIRMS OUN RADAR REFLECTIVITY DATA SHOWING

APPARENT LEADING EDGE OF MORE SUBSTANTIAL LOW-LVL MOISTURE

/DEWPOINTS IN THE UPR 50S/ JUST ABOUT TO INTERCEPT THE BOUNDARY FROM

THE SOUTH. COUPLED WITH EXPECTED NOCTURNAL STRENGTHENING OF SSWLY

LLJ AND MDT TO STRONG DIFFLUENT UPR FLOW...SETUP MAY YIELD A COUPLE

SUPERCELLS CAPABLE OF LARGE HAIL/LOCALLY DMGG WIND THROUGH LATE

TNGT.



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 28030.





...CORFIDI

