Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 261610
AFDBOI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
910 AM MST FRI DEC 26 2014

.DISCUSSION...
WEAK S/W DROPPING DOWN IN THE NORTHERLY FLOW THIS MORNING SHOULD
LIMIT FLURRIES TO EAST OF MCCALL ACROSS THE WEST CENTRAL
MOUNTAINS THIS MORNING. OTHERWISE MOSTLY SUNNY SKIES. MAIN CONCERN
FOR THIS MORNIGN WILL BE BRISK NORTHWEST WINDS ACROSS IDAHO. HAVE
UPDATED THE FORECAST FOR SLIGHTLY HIGHER WINDS DOWN THE TREASURE
AND MAGIC VALLEY TODAY. ELSEWHERE GENERALLY LIGHT WINDS EXPECTED.
FOCUS TURNS TO THE NEXT SYSTEM EXPECTED TO MOVE IN FROM THE NORTH
AND NORTHWEST SOMETIME SATURDAY AFTERNOON. SHOULD SEE ACCUMULATING
SNOW ACROSS ALL ELEVATIONS...HOW FAR WEST WILL THE SNOW ACCUMULATE
AND SNOW AMOUNTS WILL BE THE FOCUS.

&&

.AVIATION...MOSTLY VFR CONDITIONS WITH SCATTERED TO BROKEN MID LEVEL
CLOUDS.  MVFR CEILINGS IN THE MAGIC VALLEY...KTWF/KJER...THROUGH
19Z.  NORTHWESTERLY SURFACE WINDS 5-15 KNOTS.  WINDS ALOFT WILL BE
NORTHERLY AROUND 20 KNOTS UP THROUGH 10K FEET MSL.

WEEKEND OUTLOOK...VFR WITH DRY CONDITIONS SATURDAY MORNING WITH SNOW
SPREADING INTO BAKER COUNTY OREGON AND THE WEST CENTRAL MOUNTAINS
SATURDAY AFTERNOON.  SNOW WILL SPREAD OVER THE REST OF THE FORECAST
AREA SATURDAY NIGHT AND LINGER OVER THE REGION THROUGH SUNDAY
AFTERNOON AND POSSIBLY INTO SUNDAY NIGHT.  AS THE SNOW SPREADS OVER
THE REGION MOUNTAINS WILL BECOME OBSCURED ALONG WITH WIDESPREAD MVFR
CONDITIONS AND LOCAL IFR/LIFR CONDITIONS.

&&

.PREV DISCUSSION...
SHORT TERM...TODAY THROUGH SATURDAY...WITH THE EXCEPTION OF A FEW
SNOW FLURRIES IN THE MOUNTAINS THIS MORNING...COLD AND MOSTLY DRY
WEATHER CAN BE EXPECTED TODAY OVER SOUTHWESTERN IDAHO AND
SOUTHEASTERN OREGON. BRISK NORTHWESTERLY WINDS WILL BE A BIT
LIGHTER THAN YESTERDAY. ON SATURDAY...MOSTLY CLEAR SKIES IN THE
MORNING WILL BECOME CLOUDY IN THE AFTERNOON AHEAD OF ANOTHER SNOW
STORM WHICH WILL BEGIN MOVING INTO THE AREA FROM THE NORTHWEST.
THE LATEST MODEL RUNS SHOW THAT LIGHT SNOW WILL BEGIN IN THE
VICINITY OF BAKER CITY AND MCCALL LATE SATURDAY AFTERNOON
SPREADINGSOUTH AND EAST TOWARDS ONTARIO...BOISE AND MOUNTAIN
HOME ON SATURDAY EVENING.

LONG TERM...SATURDAY NIGHT THROUGH FRIDAY...A TROUGH DEVELOPS OVER
THE GULF OF ALASKA AND MOVES SOUTHEASTWARD ALONG THE BRITISH
COLUMBIA COAST AND REACHES SOUTHWEST IDAHO AND SOUTHEAST OREGON BY
LATE SATURDAY INTO SUNDAY MORNING. THE SYSTEM STALLS OUT OVER THE
PACIFIC NORTHWEST. EXPECT 1-3 INCHES IN THE LOWER VALLEYS AND 3-6
INCHES IN THE MOUNTAINS WITH THIS SYSTEM. THE UPPER LEVEL LOW
CIRCULATES PULLING IN COLD AIR FROM THE NORTHEAST AND SLOWLY DIGS
INTO CENTRAL CALIFORNIA. EXPECT COLD TEMPERATURES AND
TEMPERATURES 15- 25 DEGREES BELOW NORMAL. THE COLD AIR WILL REMAIN
IN THE VALLEYS THROUGH THE EXTENDED AS AN OMEGA RIDGE BEGINS TO
DRIFT OVER THE AREA...WITH CONTINUED COLD. THE RIDGE BREAKS DOWN
BY FRIDAY AND ANOTHER COLD FRONT WITH A REINFORCEMENT OF COLD
ARCTIC AIR REACHES THE AREA BEYOND FRIDAY.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...NONE.
OR...NONE.

&&

$$

WEATHER.GOV/BOISE

DISCUSSION...CR
AVIATION.....JA
PREV SHORT TERM...JB
PREV LONG TERM....KA


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