MESOSCALE DISCUSSION 1472
   NWS STORM PREDICTION CENTER NORMAN OK
   0742 PM CDT SAT JUN 25 2005
   
   AREAS AFFECTED...PORTIONS SERN ID...WRN WY...SWRN MT
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 524...
   
   VALID 260042Z - 260215Z
   
   MAINTAIN BULK OF WW THROUGH SCHEDULED 02Z EXPIRATION EXCEPT
   STABILIZED AIR MASS OVER NWRN PORTION. THEREAFTER...EXPECT
   INCREASING COVERAGE OF CONVECTIVE OUTFLOWS AND LOSS OF SFC DIABATIC
   HEATING TO REDUCE INSTABILITY AND SEVERE POTENTIAL.
   
   OUTFLOW BOUNDARY FROM CENTRAL MT CONVECTION HAS MOVED THROUGH
   BIL...AND EXTENDS WWD ACROSS PORTIONS STILLWATER/SWEET GRASS/PARK
   COUNTIES.  EXPECT THIS BOUNDARY TO CONTINUE DRIFTING S TOWARD
   FOOTHILLS OF BEARTOOTH RANGE.  VIS IMAGERY INDICATES TCU/STRONGLY
   SHEARED CB ATTEMPTS IN BEARTOOTHS/ABSAROKAS...AND CELLS ORIGINATING
   THERE MAY INTENSIFY TO SEVERE LEVELS AS THEY INTERACT WITH THAT
   BOUNDARY.  FARTHER S...DRY AIR MASS IS PRECLUDING RAPID
   INTENSIFICATION OF WIDELY SCATTERED CONVECTION ACROSS PORTIONS SERN
   ID.  GIVEN FAVORABLE KINEMATIC FIELDS ACROSS REGION...SEVERE
   POTENTIAL REMAINS WITH ANY ACTIVITY THAT CAN BECOME ESTABLISHED ATOP
   DEEPLY MIXED BOUNDARY LAYER.  MEANWHILE...AIR MASS ACROSS MUCH OF
   WRN MT -- N OF DLN AREA -- HAS STABILIZED SIGNIFICANTLY DUE TO
   PRECIP AND MAY BE REMOVED FROM WW.
   
   ..EDWARDS.. 06/26/2005
   
   
   ATTN...WFO...BYZ...RIW...TFX...SLC...PIH...MSO...BOI...
   
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