MESOSCALE DISCUSSION 0046
   NWS STORM PREDICTION CENTER NORMAN OK
   0732 PM CST WED JAN 23 2013
   
   AREAS AFFECTED...SERN WA...NERN ORE
   
   CONCERNING...WINTER MIXED PRECIPITATION 
   
   VALID 240132Z - 240530Z
   
   SUMMARY...MIXED WINTER PRECIPITATION IS EXPECTED TO BEGIN ACROSS THE
   REGION DURING THE NEXT HOUR OR SO. FREEZING RAIN IS LIKELY WITH
   TOTAL ACCUMULATIONS GREATER THAN 0.05 INCH POSSIBLE.
   
   DISCUSSION...LARGE SCALE ASCENT ASSOCIATED WITH A MID-LEVEL JET
   STREAK /CURRENTLY DEMARCATED BY A N-S ORIENTED PRECIPITATION BAND
   ACROSS WRN WA AND ORE/ IS EXPECTED TO MOVE EWD DURING THE NEXT FEW
   HOURS. AS IT DOES...PRECIPITATION IS EXPECTED TO BEGIN ACROSS SERN
   WA AND NERN ORE. CURRENT SURFACE TEMPERATURES ARE BELOW FREEZING
   WITH RECENT SOUNDING DATA AND MESOANALYSIS INDICATING A WARM LAYER
   /850 MB TEMPS FROM 2 TO 5 DEG C/ OVER THE DISCUSSION AREA. AS A
   RESULT...THE INITIAL PRECIPITATION TYPE IS EXPECTED TO BE A MIX OF
   FREEZING RAIN AND SLEET. INCREASING LARGE SCALE LIFT WILL LIKELY
   COOL THE WARM LAYER ALOFT ENOUGH FOR AN EVENTUAL TRANSITION TO SNOW.
   THE PRIMARY PRECIPITATION TYPE DURING THIS EVENT IS EXPECTED TO BE
   FREEZING RAIN WITH TOTAL ACCUMULATIONS FROM 0.05 TO 0.10 INCH
   POSSIBLE.
   
   ..MOSIER.. 01/24/2013
   
   
   ATTN...WFO...OTX...PDT...
   
   LAT...LON   45832055 46292030 46791961 46911823 46771727 46121730
               45591781 45261832 44991905 45012013 45392065 45832055