

046 

WWUS20 KWNS 122017

SEL5

SPC WW 122017

NMZ000-OKZ000-TXZ000-130300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 305

NWS STORM PREDICTION CENTER NORMAN OK

215 PM MDT SAT JUN 12 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST NEW MEXICO

       WESTERN OKLAHOMA PANHANDLE

       WESTERN TEXAS PANHANDLE



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 215 PM UNTIL

900 PM MDT.



HAIL TO 2 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 90

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST

SOUTHWEST OF TUCUMCARI NEW MEXICO TO 35 MILES NORTH OF CLAYTON

NEW MEXICO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 301...WW 302...WW

303...WW 304...



DISCUSSION...SHARP FRONT ARCING FROM THE TX PNHDL WWD AND THEN NWWD

ACROSS NERN NM WILL CONTINUE TO PROVIDE A FOCUS FOR TSTM INITIATION

INTO THE EVENING. VERY UNSTABLE CONDITIONS ALONG AND SOUTH OF THIS

BOUNDARY WILL FUEL ROBUST STORM INITIATION WHILE MEAN DEEP-LAYER

FLOW TAKES CELLS NORTH ACROSS THE BOUNDARY AND ATOP MORE STABLE

SURFACE-BASED AIRMASS TO THE NORTH. DESPITE STORMS BECOMING

DECOUPLED FROM MORE UNSTABLE BOUNDARY LAYER...SHEAR IN THIS

ENVIRONMENT SHOULD STILL PROMOTE UPDRAFT ROTATION WITH ATTENDANT

THREAT OF LARGE HAIL. DAMAGING WINDS AND PERHAPS A BRIEF TORNADO

CANNOT BE RULED OUT FOR ANY STORM CROSSING OR TEMPORARILY RESIDING

ALONG THE FRONTAL ZONE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 20035.





...CARBIN

