MESOSCALE DISCUSSION 1676
   NWS STORM PREDICTION CENTER NORMAN OK
   0324 PM CDT THU JUL 03 2008
   
   AREAS AFFECTED...CENTRAL/EASTERN PORTIONS OF ORE/WA INTO NORTHERN ID
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 032024Z - 032300Z
   
   RISK FOR SEVERE HAIL/WIND IS EXPECTED TO GRADUALLY INCREASE ACROSS
   THE CENTRAL/EASTERN PORTIONS OF ORE/WA INTO NORTHERN ID THIS
   AFTERNOON. SOME UNCERTAINTY EXISTS REGARDING THE TIMING/NECESSITY OF
   A WATCH...BUT WILL CLOSELY MONITOR CONVECTIVE TRENDS OVER THE NEXT
   SEVERAL HOURS.
   
   IN WAKE OF MORNING ELEVATED/POTENTIAL HAIL PRODUCING TSTMS ACROSS
   WESTERN WA...VISIBLE SATELLITE IMAGERY REFLECTS DEEPENING CU
   PRIMARILY FOCUSED ALONG THE ORE/WA CASCADES EARLY THIS AFTERNOON.
   WITH THE INITIAL MID LEVEL IMPULSE NOW MOVING INTO BRITISH
   COLUMBIA...AND A SECONDARY/SOMEWHAT MORE SUBSTANTIAL SHORTWAVE
   TROUGH OFFSHORE AROUND 130 W...ORE/WA REGION APPEARS TO BE
   EXPERIENCING SUBTLE SHORTWAVE RIDGING AT THIS TIME. WHILE ISOLATED
   TSTMS MAY DEVELOP/GRADUALLY INCREASE OVER THE NEXT SEVERAL HOURS
   GIVEN TERRAIN INFLUENCES AND A HOT BOUNDARY LAYER...AFOREMENTIONED
   TIMING OF LARGE SCALE SUPPORT SUGGESTS THE RELATIVELY MOST ORGANIZED
   SEVERE THREAT MAY NOT OCCUR UNTIL LATER THIS AFTERNOON/EARLY
   EVENING. 
   
   REGARDLESS...A VERY WARM/MOIST AIRMASS EXISTS ACROSS THE
   REGION...WITH PRECIPITABLE WATER VALUES GENERALLY AROUND 1 INCH PER
   12Z OBSERVED RAOBS. RUC FORECAST SOUNDINGS IMPLY THE POTENTIAL FOR
   UP TO 1000-1500 J/KG MLCAPE LATER THIS AFTERNOON...ESPECIALLY ACROSS
   CENTRAL/EASTERN WA AND NORTHEAST ORE INTO NORTHERN ID. GIVEN
   TSTMS...MODERATELY STRONG/DEEP SOUTH-SOUTHWESTERLY FLOW AND 40+ KT
   OF EFFECTIVE BULK SHEAR WILL SUPPORT THE DEVELOPMENT OF BOTH
   SUPERCELLS AND LINEAR BOWING SEGMENTS...WITH AMPLE POTENTIAL
   INSTABILITY/STEEP LAPSE RATES FAVORING BOTH SEVERE HAIL AND STRONG
   WINDS GUSTS.
   
   ..GUYER.. 07/03/2008
   
   
   ATTN...WFO...MSO...BOI...OTX...PDT...MFR...SEW...PQR...
   
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