MESOSCALE DISCUSSION 1407
   NWS STORM PREDICTION CENTER NORMAN OK
   0441 PM CDT THU JUL 02 2009
   
   AREAS AFFECTED...PARTS OF SWRN/CENTRAL MT
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 022141Z - 022215Z
   
   WW IS POSSIBLE FOR PARTS OF SWRN INTO CENTRAL MT TO THE WEST OF WW
   538.
   
   WATER VAPOR IMAGERY INDICATED SEVERAL WEAK IMPULSES MOVING THROUGH
   THE NRN EXTENT OF THE UPPER RIDGE OVER MT.  FORCING FOR ASCENT WITH
   THESE FEATURES APPEARS TO BE AIDING ONGOING TSTM DEVELOPMENT OVER
   SWRN INTO CENTRAL MT.  A CORRIDOR OF MODERATE INSTABILITY ACROSS
   CENTRAL MT AND EFFECTIVE BULK SHEAR AROUND 40 KT SUGGEST ADDITIONAL
   ORGANIZED STORMS WILL BE POSSIBLE INTO THE EVENING.  ELY LOW LEVEL
   UPSLOPE FLOW INTO THE HIGHER TERRAIN BENEATH WSWLY MID LEVEL WINDS
   WILL MAINTAIN STRAIGHT HODOGRAPHS AND THE POTENTIAL FOR SPLITTING
   STORMS.  STEEP MID LEVEL LAPSE RATES /7-8 C/KM/ WILL SUPPORT A
   THREAT FOR ADDITIONAL SEVERE HAIL.
   
   CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED WITH THE POTENTIAL
   FOR A WATCH...IF TSTM COVERAGE BECOMES GREATER THAN CURRENTLY
   SUGGESTED BY SHORT TERM MODELS.
   
   ..PETERS.. 07/02/2009
   
   
   ATTN...WFO...BYZ...GGW...RIW...TFX...MSO...
   
   LAT...LON   45120853 45011046 45271141 45531227 46911258 47711267
               48551140 48740972 48410818 47550778 46150774 45120853