MESOSCALE DISCUSSION 0331
   NWS STORM PREDICTION CENTER NORMAN OK
   0322 PM CDT FRI MAR 29 2013
   
   AREAS AFFECTED...PORTIONS OF THE TX PANHANDLE/SOUTH PLAINS...NWRN TX
   AND SWRN OK
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 292022Z - 292245Z
   
   PROBABILITY OF WATCH ISSUANCE...60 PERCENT
   
   SUMMARY...WIDELY SCTD SVR TSTMS WITH LARGE HAIL AND DAMAGING WINDS
   MAY DEVELOP AFTER 2030Z. A WW MAY BE NEEDED PRIOR TO 22Z.
   
   DISCUSSION...FORCING FOR ASCENT ASSOCIATED WITH AN UPPER LEVEL
   IMPULSE MOVING INTO W TX WILL OVERSPREAD A MODERATELY UNSTABLE AIR
   MASS EAST OF A SHARPENING SFC DRYLINE THROUGH LATE AFTN.  BY
   22Z...THE DRYLINE SHOULD EXTEND SWD FROM A WEAK SFC LOW OVER THE SRN
   TX PANHANDLE S/SWWD INTO THE TRANS-PECOS REGION. LATEST VISIBLE
   IMAGERY SUGGESTS SOME INCREASE IN CU FIELD NEAR THE CAPROCK TO THE
   SW OF CDS. CONTINUED DAYTIME HEATING AND FORCING FOR ASCENT SHOULD
   REDUCE CIN SUFFICIENTLY FOR WIDELY SCTD TSTM DEVELOPMENT AFT 2030Z. 
   WITH STEEP MID-LEVEL LAPSE RATES /8-8.5 DEG C/KM/ AND DEEP-LAYER
   SHEAR OF 35-40 KT...ENVIRONMENT WILL BE FAVORABLE FOR LARGE HAIL AND
   DAMAGING WINDS. ONE OR MORE ESEWD-MOVING CLUSTERS OF STORMS MAY
   EVENTUALLY DEVELOP OVER TIME INTO EARLY EVENING WITH PRIMARILY A
   THREAT FOR DAMAGING WINDS.
   
   ..BUNTING/CORFIDI.. 03/29/2013
   
   
   ATTN...WFO...OUN...SJT...LUB...AMA...MAF...
   
   LAT...LON   31850120 31870182 32000202 32650174 33050149 33490144
               34450140 34850144 35210126 35430081 35550023 35429951
               34719903 33449899 32079999 31840107 31850120