MESOSCALE DISCUSSION 0784
   NWS STORM PREDICTION CENTER NORMAN OK
   0739 PM CDT SUN MAY 13 2007
   
   AREAS AFFECTED...NE MT...NW ND
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 268...
   
   VALID 140039Z - 140215Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 268
   CONTINUES.
   
   AN ADDITIONAL WW IS NOT CURRENTLY ANTICIPATED TO THE NORTHEAST OF WW
   268.
   
   NORTH OF STRONGER UPSLOPE FLOW...DESTABILIZATION HAS BEEN WEAKER...
   BUT NARROW PRE-FRONTAL THERMAL RIDGE EXTENDING ACROSS EASTERN
   MONTANA INTO SOUTHERN SASKATCHEWAN HAS STILL CONTRIBUTED TO MOST
   UNSTABLE CAPE OF 500 TO 1000 J/KG ACROSS MUCH OF NORTHEAST MONTANA. 
   THIS HAS SUPPORTED VIGOROUS ONGOING CLUSTER OF STORMS ACROSS PARTS
   OF DANIELS/ROOSEVELT/SHERIDAN COUNTIES...WHICH HAS MOSTLY BEEN
   ENHANCED BY STRONG DEEP LAYER SHEAR ASSOCIATED WITH NORTHEASTERLY
   PRE-FRONTAL LOW-LEVEL WINDS BENEATH MODERATELY STRONG 30+ KT
   SOUTHWESTERLY 500 MB FLOW.  DAMAGING WIND/HAIL THREAT WITH THIS
   SMALL CONVECTIVE SYSTEM MAY CONTINUE INTO AREAS NEAR/NORTH OF
   WILLISTON BY 02Z...BUT ACTIVITY IS EXPECTED TO WEAKEN
   THEREAFTER...AS IT PROGRESSES EAST OF LOW-LEVEL THERMAL RIDGE AXIS.
   
   ..KERR.. 05/14/2007
   
   
   ATTN...WFO...BIS...GGW...
   
   48460499 48880442 48740373 48090367 47780432 47910477