MESOSCALE DISCUSSION 1270
   NWS STORM PREDICTION CENTER NORMAN OK
   0748 PM CDT SUN JUN 24 2007
   
   AREAS AFFECTED...PORTIONS CENTRAL/ERN MT...EXTREME N-CENTRAL/NERN
   WY.
   
   CONCERNING...TORNADO WATCH 447...
   
   VALID 250048Z - 250215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 447 CONTINUES.
   
   AMIDST STRONG CAPPING...CONVECTION GENERALLY HAS BEEN SLOW TO
   DEVELOP AND ORGANIZE SO FAR ACROSS WW.  HOWEVER RAPID
   INTENSIFICATION IS UNDERWAY FOR CONVECTION EVIDENT AT 0030Z OVER
   PORTIONS GOLDEN VALLEY/FERGUS/WHEATLAND COUNTIES.  PROJECTED INFLOW
   LAYER FOR RIGHT-MOVING TSTMS EVOLVING FROM THIS ACTIVITY IS ALONG
   MOIST AXIS THAT IS ANALYZED FROM THOSE COUNTIES GENERALLY REF NEAR
   I-94 TO SRN PORTION ND BORDER.  MODIFIED RAOBS AND RUC SOUNDINGS
   SHOW VERY STEEP MIDLEVEL LAPSE RATED ATOP DEW POINTS TRENDING FROM
   MID/UPPER 50S OVER CENTRAL MT TO MID 60S FARTHER E...WITH MLCAPES
   GENERALLY 2000-3000 J/KG AHEAD OF CENTRAL MT ACTIVITY.  MLCAPES WILL
   REMAIN AS HIGH AS 4000-5000 J/KG FOR ANOTHER FEW HOURS ACROSS
   E-CENTRAL/SERN MT...FOR ANY DEVELOPMENT THAT MAY OCCUR NEAR AND NE
   OF NRN BIGHORN RANGE.  VERTICAL SHEAR PROFILES WILL CONTINUE TO BE
   FAVORABLE...FEATURING STRONG VEERING WITH HEIGHT ALONG AND N OF SFC
   QUASISTATIONARY FRONT THAT IS ANALYZED FROM CENTRAL SD SWWD TO SHR
   AREA.  0-3 KM SRH 250-400 J/KG ARE EVIDENT OVER E-CENTRAL/SERN MT
   ATTM...AND MAY INCREASE SLIGHTLY AS ELY/ESELY BRANCH OF LLJ
   INTENSIFIES NEAR SUNSET.  VERY LARGE/DAMAGING HAIL AND SVR GUSTS
   REMAIN POSSIBLE...ALONG WITH TORNADOES FROM ANY RELATIVELY DISCRETE
   SUPERCELLS.
   
   ..EDWARDS.. 06/25/2007
   
   
   ATTN...WFO...BIS...UNR...BYZ...GGW...RIW...TFX...
   
   44230408 44590699 45050974 47640949 47650692 48050640
   48010406 47520388 44980391