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000
FXUS65 KBOI 082230 AAA
AFDBOI

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BOISE ID
330 PM MST SUN DEC 8 2013

...UPDATED TO INCLUDE WIND CHILL WARNING IN PARTS OF SOUTH-CENTRAL
LATE TONIGHT AND MONDAY MORNING...

.SHORT TERM...WEAK WAVE IN NORTHERLY FLOW BRINGS SOME CLOUDS
THROUGH OUR THIS EVENING THEN CLEARING AND ANOTHER VERY COLD NIGHT
...THIS TIME COLDEST IN IDAHO MOUNTAIN AREAS. WIND CHILL WILL REACH
-35F IN SOUTHERN IDAHO HIGHLANDS AND -40F IN THE CAMAS PRAIRIE.
NOT QUITE AS COLD AS LAST NIGHT IN OREGON.  ANOTHER WAVE IN THE
NORTHERLY FLOW WILL BRING A CHANCE OF SNOW SHOWERS TO IDAHO MOUNTAINS
MONDAY...WITH CLOUDINESS ELSEWHERE.  CLOUDS WILL MODERATE LOW TEMPS
MONDAY NIGHT AND ANOTHER WEAK WAVE WILL BRING A CHANCE OF SNOW
SHOWERS TO IDAHO MOUNTAINS AGAIN TUESDAY.  A LITTLE MILDER AGAIN
TUESDAY AS FLOW ALOFT CHANGES FROM STRAIGHT NORTHERLY TO NORTHWESTERLY.
NO SIGNIFICANT SURFACE WINDS.

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...UPPER LEVEL RIDGE
DEVELOPS ALONG THE WEST COAST TUESDAY NIGHT AND SHIFTS INLAND ON
WEDNESDAY. CONCERN HAS BEEN AN INVERSION SETTING UP KEEP THE COLD
AIR TRAPPED. HOWEVER...THE MODELS HAVE BEEN CONSISTENT IN SHOWING
THIS ISN/T GOING TO BE THE CASE AS THE UPPER RIDGE/INVERSION WILL
SIMPLY NOT BE STRONG ENOUGH TO KEEP THE COLD AIR TRAPPED. CLOUD
COVER WEDNESDAY WILL KEEP MIN TEMPS 5 TO 10 DEGREES WARMER THAN
TUESDAY. INCREASING SOUTHEAST WINDS AHEAD OF THE DEVELOPING TROUGH
FOR FRIDAY WILL ALLOW TEMPS IN THE VALLEY TO WARM INTO THE LOWER
30S WEDNESDAY...WARM ENOUGH FOR THE SNOW TO START MELTING. BY
THURSDAY...BOUNDARY LAYER WINDS INCREASE TO 20 KTS WHICH WILL ALLOW
PLENTY OF MIXING AND THE REMOVAL OF SNOW COVER IN THE WESTERN
SNAKE RIVER PLAIN. MODEL ARE IN BETTER AGREEMENT WITH A WEAK TROUGH
MOVING TROUGH ON FRIDAY. NOT MUCH MOISTURE ASSOCIATED WITH THIS
TROUGH BUT HAVE INCREASED POPS TO CHANCE FOR SNOW IN THE MOUNTAINS
AND A SLIGHT CHANCE OF RAIN IN THE VALLEYS. ANOTHER WEAK RIDGE MOVES
INLAND SATURDAY BUT WILL WEAKEN BY SUNDAY AS STRONG WESTERLY FLOW
SETS UP OVER THE PACIFIC NORTHWEST. TEMPERATURES STEADILY CLIMB ABOVE
FREEZING ON WEDNESDAY REACHING NORMAL BY SATURDAY.

&&

.AVIATION...VFR. SCATTERED TO BROKEN HIGH CLOUDS THROUGH THE
EVENING. LIGHT SURFACE WINDS. WINDS ALOFT NORTHWEST AROUND 20 KTS AT
10K FT MSL.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...WIND CHILL WARNING FROM 11 PM THIS EVENING TO 11 AM MST MONDAY
     IDZ015-030.
     WIND CHILL WARNING FROM 5 AM TO 11 AM MST MONDAY IDZ028.
OR...NONE.

&&

$$

WEATHER.GOV/BOISE

SHORT TERM...LC
LONG TERM....JDS/WH
AVIATION.....JDS