jueves, 23 de abril de 2009

thunderstorms today,night 23 april

MD 547 graphicALHIGH-BASED THUNDERSTORMS WILL LIKELY PRODUCE GUSTY WINDS /ISOLATED

   SEVERE GUSTS/ AND PERHAPS SMALL HAIL.  A WEATHER WATCH IS NOT    ANTICIPATED.        WATER VAPOR IMAGERY CLEARLY SHOWS A MID-LEVEL WAVE TRANSLATING EAST    ACROSS SOUTHERN NM AND NORTHERN MEXICO.  LARGE SCALE ASCENT    ASSOCIATED WITH THIS WAVE COUPLED WITH WEAK SOUTHEAST LOW-LEVEL    UPSLOPE FLOW HAVE CONTRIBUTED TO DEEPENING SURFACE-BASED    THUNDERSTORM INITIATION ACROSS SOUTHWEST TX...PARTICULARLY ACROSS    THE DAVIS AND DEL NORTE MOUNTAINS.  18Z RUC FORECAST SOUNDINGS BASED    ON AN 88/36F PARCEL YIELDS APPROXIMATELY 780 J PER KG MLCAPE WITH    CLOUD BASES AT OR ABOVE 16K FEET.          DEEPLY MIXED BOUNDARY LAYER WILL CONTRIBUTE TO EVAPORATIVE    COOLING...AUGMENTING THE DOWNDRAFTS AS THE MULTI-CELL STORMS    COLLAPSE ACROSS THE LOWER ELEVATIONS LATE THIS AFTERNOON AND EARLY    EVENING.  AS A RESULT...GUSTY WINDS /POSSIBLY ISOLATED SEVERE/ MAY    OCCUR.  BASED ON THE NSSL 7 KM CAPPI SHOWING ELEVATED 50+ DBZ CORES    ALREADY OCCURRING WITH A COUPLE OF ONGOING STORMS...EXPECT THAT AT    LEAST ISOLATED SMALL HAIL MAY OCCUR WITH THE MATURE STORMS ACROSS 


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