SPC MESOSCALE DISCUSSION 1625 FOR SWRN MT...
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL...
   
   VALID 072339Z - 080200Z
   
   THUNDERSTORMS CONTINUE TO DEVELOP ACROSS SWRN MT...WITH LOCAL
   DAMAGING WIND THREAT INCREASING.  WW MAY BE REQUIRED IN THE NEXT 1
   TO 2 HOURS.
   
   DAYTIME HEATING CONTINUES ACROSS SWRN MT WHERE LATEST VISIBLE
   IMAGERY SHOWS SMALL AREA OF LITTLE CLOUD COVER INVOF 3HT / BZN /
   LVM.  WITH TEMPERATURES NOW INTO THE LOW TO MID 70S IN THIS REGION
   ALONG WITH DEWPOINTS IN THE LOW TO MID 50S...SURFACE-BASED CAPE OF
   500 TO 1000 J/KG IS OBSERVED.  LATEST TFX / GREAT FALLS MT/ WSR-88D
   CONTINUES TO SHOW SFC-6 KM MEAN WIND FROM THE SOUTH -- SUGGESTING
   NLY STORM MOTIONS.  HOWEVER...LINE OF TCU / CB INDICATED BY VISIBLE
   IMAGERY FROM JUST EAST OF HLN TO JUST E OF BTM -- INCLUDING SEVERE
   STORMS IN BROADWATER AND LEWIS AND CLARK COUNTIES -- APPEAR TO BE
   PROPAGATING IN A MORE NELY DIRECTION.  THIS APPEARS TO BE THE
   RESULT OF 30 KT ELY SURFACE WIND OBSERVED AT LVM ATTM...AND WITH
   CONTINUED HIGHER THETA-E LOW-LEVEL INFLOW FEEDING THESE STORMS --
   FAST NELY STORM MOTION SUGGESTS A THREAT FOR LOCALLY DAMAGING
   WINDS.  
   
   ..GOSS.. 08/07/02