FXUS65 KBOI 062208
AFDBOI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
308 PM MST SUN DEC 6 2009

.SHORT TERM...TONIGHT THROUGH TUESDAY...SNOW SHOWERS ACROSS THE
SOUTHERN HALF OF THE CWFA TONIGHT ARE EXPECTED TO PRODUCE LIGHT
ACCUMULATIONS OF LOCALLY AN INCH. GUSTY EAST TO NORTHEAST WINDS TO
AROUND 30 MPH SLACKEN SOMEWHAT AFTER DARK THEN BECOMING NE-N
/IDAHO/ AND N-NW /OREGON/ 10-25 MPH FOR MONDAY. ELONGATED UPPER
LOW SW OREGON THROUGH SOUTHERN IDAHO THIS EVENING LOOKS BRING
AREAS OF LIFT AND MOISTURE...WITH UPSLOPE INTO FAR SOUTHERN
MOUNTAINS...NEAR THE NEVADA BORDER FOR ANOTHER INCH OR SO OF SNOW
EARLY MONDAY MORNING INCLUDING 95 THROUGH JORDAN VALLEY AND 93
THROUGH SOUTHERN TWF COUNTY. LOW STARTS TO SHIFT EAST MONDAY
AFTERNOON FAVORING SNOW SHOWERS ACROSS SRN IDAHO AND DRIER
CONDITIONS BNO-MYL. DRYING TREND CONTINUES MONDAY EVENING WITH
SNOW SHOWERS ACROSS SOUTHERN TWF COUNTY THEN DRY NW FLOW MOVES IN
BY LATE MORNING TUESDAY. GUSTY WEST WINDS 10-20 MPH IN THE MAGIC
VALLEY TUESDAY AFTERNOON. MAV/MET TEMPERATURES HAVE COME INTO
ALIGNMENT WITH EACH OTHER BUT WARM UP THE CENTRAL IDAHO ZONES
FASTER THAN WOULD BE EXPECTED SO HAVE SHAVED A FEW DEGREES OFF
HIGHS /AND MANY OFF FAFI1 LOWS/ THE NEXT 4 PDS.

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...BOTH THE EC AND THE GFS 
REMAIN IN REALLY GOOD AGREEMENT WITH THEMSELVES AND EACH OTHER FOR 
THE EARLY PORTION OF THE EXTENDED. MAIN UPPER TROUGH SLOWLY EXITS 
OUT OF THE AREA WEDNESDAY AS UPPER RIDGE PUSHES FURTHER TO THE EAST. 
THIS WILL GRADUALLY SHIFT THE WINDS MORE FROM A COLD NORTHERLY TO 
MORE OF A MODERATING NORTHWESTERLY DIRECTION. THIS PATTERN STILL 
KEEPS THE MOIST SUBTROPICAL FLOW SOUTH OF THE NEVADA BORDER AREA 
THROUGH THE WEEK. SO POPS REMAIN WELL BELOW CLIMO FOR WEDNESDAY 
THROUGH FRIDAY...WITH THAT SAID MAY JUST HAVE TO WATCH FOR ANY WEAK 
DISTURBANCES THAT DROP INTO THE WEST CENTRAL MOUNTAINS IN THE NW-LY 
FLOW BY FRIDAY. FOR THE WEEKEND...MODELS ARE COMING INTO BETTER 
AGREEMENT BY SHOWING ENOUGH WESTERLIES FINALLY UNDERCUT THE COLD 
AIRMASS AT THE SURFACE AND LIFTING THEM FURTHER NORTH. THIS SHOULD 
BRING AT OR SLIGHTLY ABOVE NORMAL TEMPERATURES WITH NEAR OR ABOVE 
CLIMO POPS AS ANOTHER LOW PRESSURE AREA PUSHES INTO THE PACIFIC 
NORTHWEST COAST. 

&&

.AVIATION...AREAS OF MVFR CONDITIONS IN LOW CLOUDS AND LIGHT SNOW 
WILL REMAIN POSSIBLE THROUGH 06Z AS WEAK UPPER LOWS DRIFT OVER THE 
AREA. THE WEST CENTRAL MOUNTAINS ARE EXPECTED TO REMAIN VFR 
CONDITIONS THROUGH THE PERIOD. CONDITIONS ACROSS SOUTHERN IDAHO AND 
OREGON DETERIORATE AFTER MIDNIGHT AS THE MAIN UPR LOW MOVES OVER THE 
REGION. LOW CLOUDS AND -SN ARE EXPECTED. EAST TO NE WINDS REMAIN 
STRONG AND GUSTY THIS EVENING. WINDS SHIFT NORTHWEST BY 15Z. 

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...WIND CHILL WARNING FROM MIDNIGHT TONIGHT TO 10 AM MST MONDAY FOR 
     IDZ028.
OR...NONE.
&&

$$

WEATHER.GOV/BOISE

SHORT TERM...VM
LONG TERM....CR/BB
AVIATION.....CR