MESOSCALE DISCUSSION 1634
   NWS STORM PREDICTION CENTER NORMAN OK
   0447 PM CDT SAT JUL 16 2011
   
   AREAS AFFECTED...N CNTRL CO...SERN WY
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 162147Z - 162245Z
   
   THUNDERSTORM COVERAGE IS GRADUALLY INCREASING ACROSS N CNTRL CO INTO
   SERN WY. ISOLATED COVERAGE OF SEVERE STORMS IS EXPECTED TO PRECLUDE
   A WW ISSUANCE.
   
   A WEAK UPPER IMPULSE OBSERVED ON 2130Z WV IMAGERY ACROSS NWRN CO/S
   CNTRL WY IN COMBINATION WITH MOIST UPSLOPE LOW LEVEL FLOW HAS
   INFLUENCED AN INCREASE IN CONVECTIVE COVERAGE THIS AFTERNOON.
   HOWEVER...A LARGER SCALE UPPER RIDGE CENTERED OVER THE CNTRL PLAINS
   IS LIKELY SUPPRESSING MORE ROBUST DEVELOPMENT. GENERALLY WEAK
   INSTABILITY /500 J/KG OR LESS PER MESOANALYSIS/ APPEARS TO BE
   INHIBITING STRONGER UPDRAFTS AS WELL...THOUGH THE EVOLUTION OF A
   SEMI-ORGANIZED CLUSTER REMAINS POSSIBLE IF STORMS CAN PROGRESS ENEWD
   INTO GREATER INSTABILITY ACROSS MUCH OF NEB. 30-40 KT MID LEVEL FLOW
   AND VEERING WINDS WITH HEIGHT MAY SUPPORT OCCASIONAL ROTATION.
   
   ..HURLBUT.. 07/16/2011
   
   
   ATTN...WFO...LBF...BOU...CYS...
   
   LAT...LON   39160458 39360602 40420600 42040512 42760372 42490297
               41980236 41130267 39160458