MESOSCALE DISCUSSION 1324
   NWS STORM PREDICTION CENTER NORMAN OK
   0944 PM CDT FRI JUN 29 2007
   
   AREAS AFFECTED...WRN INTO NORTH CENTRAL MT
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 464...
   
   VALID 300244Z - 300345Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 464
   CONTINUES.
   
   REGIONAL RADARS INDICATED SEVERE TSTMS EXTENDING FROM LIBERTY INTO
   HILL AND NRN CHOUTEAU COUNTIES IN NORTH CENTRAL MT TRACKING TO THE
   NE AT 35-40 KT.  AIR MASS LOCATED NE OF THIS ACTIVITY INTO FAR NORTH
   CENTRAL MT AND ADJACENT PARTS OF SERN ALBERTA AND SRN SASKATCHEWAN
   REMAINS MODERATELY UNSTABLE.  00Z SOUNDINGS INDICATED INVERTED-V
   THERMODYNAMIC PROFILES ACROSS THIS REGION WITH RECENT HVR SURFACE
   OBSERVATION INDICATING A 30 DEGREE DEWPOINT DEPRESSION.  ALTHOUGH
   OBJECTIVE ANALYSES INDICATED SOME INCREASE IN INHIBITION...STRONG
   EFFECTIVE BULK SHEARS AND MODERATE INSTABILITY ARE EXPECTED TO
   MAINTAIN DAMAGING WIND THREAT WITH ONGOING CLUSTER OF TSTMS EXPECTED
   TO REACH THE MT/CANADA BORDER AROUND 04Z.  SIGNIFICANT WIND GUSTS
   ALSO REMAIN POSSIBLE AS THESE TSTMS MOVE NEWD THROUGH FAR NORTH
   CENTRAL MT.
   
   FARTHER W...FAST MOVING /50+ KT/ TSTMS...NOW LOCATED ALONG THE ID/MT
   BORDER INTO MINERAL COUNTY MT...SHOULD PROGRESS NEWD ALONG AN
   INSTABILITY AXIS THAT EXTENDED INTO THE WRN PART OF WW 464.  CURRENT
   TRENDS INDICATED THIS ACTIVITY WILL REACH POWELL/SERN FLATHEAD/LEWIS
   AND CLARK COUNTIES BY 04Z.  EVOLUTION OF THIS WRN MT ACTIVITY WILL
   BE MONITORED WITH THE POTENTIAL FOR LOCAL WATCH EXTENSION IF SEVERE
   THREAT IS EXPECTED TO PERSIST BEYOND 05Z.
   
   ..PETERS.. 06/30/2007
   
   
   ATTN...WFO...BYZ...GGW...TFX...MSO...
   
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