MESOSCALE DISCUSSION 1159
   NWS STORM PREDICTION CENTER NORMAN OK
   0313 PM CDT WED JUN 09 2004
   
   AREAS AFFECTED...ID AND SWRN MT
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 092013Z - 092145Z
   
   TSTMS EXPECTED TO INCREASE ACROSS THE SNAKE RIVER PLAIN THROUGH THIS
   AFTERNOON. A FEW STORMS COULD BE SEVERE AND A WATCH WILL LIKELY BE
   ISSUED SHORTLY.
   
   CONVECTION HAS INCREASED ACROSS THE TETONS AND BITTERROOTS THIS
   AFTERNOON AS DIFFERENTIAL HEATING...UPSLOPE FLOW...AND STRONG LARGE
   SCALE ASCENT WITHIN EXIT REGION OF MID LEVEL JET ACT ON
   DESTABILIZING AIRMASS. LATEST POINT FORECAST SOUNDING DATA FROM
   ACROSS THE REGION SUGGEST MLCAPE COULD INCREASE TO BETWEEN 500-1200
   J/KG AS THE AFTERNOON PROGRESSES AND STRONG HEATING CONTINUES. THIS
   INSTABILITY WILL BE MORE THAN ADEQUATE TO MAINTAIN STORMS DEVELOPING
   OFF THE HIGHER TERRAIN AND ACROSS THE LOWER ELEVATIONS OF SERN ID.
   VERY STRONG DEEP LAYER SHEAR PROFILES WILL ONLY STRENGTHEN FURTHER
   AS MID LEVEL WIND MAX MOVES OVER THE AREA. EXPECT INCREASING CHANCE
   OF FAST MOVING STORMS...POSSIBLY SUPERCELLS...GENERATING
   HIGH/DAMAGING WINDS AND HAIL.
   
   ..CARBIN.. 06/09/2004
   
   
   ATTN...WFO...RIW...TFX...SLC...PIH...MSO...BOI...
   
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