AREA FORECAST DISCUSSION

 
 FXUS65 KPIH 230953
 AFDPIH
 
 AREA FORECAST DISCUSSION
 NATIONAL WEATHER SERVICE POCATELLO ID
 253 AM MST MON NOV 23 2009
 
 .SHORT TERM...TODAY THROUGH WEDNESDAY NIGHT. SNOW AND WIND
 PRODUCING TROUGH HAS MOVED INTO WYOMING THIS MORNING AND
 PRECIPITATION HAS DIMINISHED ACROSS THE AREA. UPPER RIDGE BUILDS
 INTO NORTHWEST TODAY WHERE IT IS EXPECTED TO REMAIN FOR THE NEXT
 SEVERAL DAYS. AN UPPER WAVE PUSHING INTO BRITISH COLUMBIA TODAY
 WILL RIDE OVER THE TOP OF THE RIDGE ON TUESDAY WITH THE SOUTHERN
 EXTENT OF THE PRECIPITATION BAND CLIPING THE NORTHERN REACHES OF
 THE FORECAST AREA...THEN CLIPPING THE WYOMING BORDER TUESDAY
 NIGHT. THE RIDGE RESTRENGTHENS AND SHIFTS EAST INTO IDAHO ON
 WEDNESDAY AND WEDNESDAY NIGHT. SLIGHT CHANCE POPS WILL CONTINUE
 TODAY NEAR THE WYOMING BORDER WITH LINGERING INSTABILITY. LOW
 CHANCE POPS RETURN TO THE UPPER SNAKE HIGHLANDS ON WITH THE WAVE
 MOVING OVER THE RIDGE ON TUESDAY AND TUESDAY NIGHT. OTHERWISE...A
 RETURN TO FAIR SKIES...HOWEVER TEMPERATURES WILL BE QUITE COLD
 OVERNIGHT WITH HIGH TEMPERATURES MODERATING TO NEAR SEASONAL BY
 WEDNESDAY. THROUGH THE PERIOD. HANKO
 
 .LONG TERM...THURSDAY THROUGH SUNDAY...BOTH THE ECM AND GFS DELAY
 ARRIVAL OF PRECIPITATION ASSOCIATED WITH THE NEXT PACIFIC
 DISTURBANCE UNTIL FRIDAY. THERE STILL IS QUITE A BIT OF RUN TO RUN
 VARIATION IN THE SHAPE OF THE TROUGH AND PLACEMENT OF
 PRECIPITATION. THE CURRENT FORECAST MAINTAINS THE TREND FOR FRIDAY
 AND SATURDAY. ONCE THIS DISTURBANCE PASSES...A HIGH PRESSURE RIDGE
 DEVELOPS OVER OREGON WITH NORTHERLY FLOW OVER IDAHO AND GENERALLY
 COOLER TEMPERATURES. RS
  
 
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 .AVIATION...SCATTERED LOW CLOUDS PRODUCING LOCALIZED MVFR CLOUD DECK 
 ALONG THE EASTERN BENCH AREAS OF THE SNAKE PLAIN THIS MORNING. 
 CLOUDS SHOULD DISSIPATED AROUND 18Z BUT MAY REDEVELOP TUESDAY 
 MORNING IN THE UPPER SNAKE PLAIN NEAR KIDA. RS
 
 
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 .PIH WATCHES/WARNINGS/ADVISORIES...
 NONE.
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