MESOSCALE DISCUSSION 1621
   NWS STORM PREDICTION CENTER NORMAN OK
   0634 PM CDT SUN JUL 19 2009
   
   AREAS AFFECTED...SERN CO...NERN NM...OK/TX PANHANDLES
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 604...
   
   VALID 192334Z - 200030Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 604
   CONTINUES.
   
   PORTIONS OF THE OK/TX PANHANDLE ARE BEING CLOSELY MONITORED FOR THE
   POSSIBILITY OF AN ADDITIONAL SEVERE TSTM WATCH OR AREAL EXTENSION OF
   WW 604.
   
   RECENT RADAR IMAGERY DEPICTED TSTM ACTIVITY PRIMARILY CONCENTRATED
   ALONG THE SANGRE DE CRISTO MTNS AND ACROSS THE RATON MESA. THE
   LATTER AREA HAS SHOWN INCREASED SIGNS OF AMALGAMATING OUTFLOWS AND
   THIS MAY COMMENCE THE OVERALL TRANSITION FROM WHAT HAS BEEN A
   MARGINALLY SEVERE HAIL THREAT INTO MORE OF A DAMAGING WIND THREAT
   THIS EVENING. 23Z SUBJECTIVE SURFACE ANALYSIS PLACED A
   QUASI-STATIONARY FRONTAL BOUNDARY FROM HARDING COUNTY NM SEWD TO
   NEAR 40 SW CDS. VISIBLE SATELLITE IMAGERY DEPICTS A HEALTHY SC FIELD
   NE OF THIS BOUNDARY ACROSS THE CNTRL/ERN TX PANHANDLE WHERE MIDDLE
   TO UPPER 50S SURFACE DEW POINTS CONTRIBUTE TO A MODERATELY UNSTABLE
   AIR MASS WITH MLCAPE AROUND 1500 J/KG. WITH STRONG DIRECTIONAL
   VEERING FROM SLY FLOW AT THE SURFACE TO MODERATE NLY FLOW AOA 3 KM
   AGL /PER AREA VWP AND PROFILER DATA/...AN ORGANIZED CONVECTIVE
   CLUSTER MAY ULTIMATELY EVOLVE S/SEWD ACROSS FAR ERN NM INTO THE WRN
   AND PERHAPS CNTRL PANHANDLES.
   
   ..GRAMS.. 07/19/2009
   
   
   ATTN...WFO...DDC...LUB...AMA...PUB...ABQ...
   
   LAT...LON   37560235 37440196 36980161 36220125 35370100 34750117
               34240135 33960219 33850320 34060472 34360506 34720526
               35470488 36680387 37300300 37560235