Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 270904
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
304 AM MDT FRI MAR 27 2015

.SHORT TERM...TODAY THROUGH SUN NIGHT. NEAR-RECORD WARMTH TODAY
WITH UPPER LEVEL RIDGE AT ITS STRONGEST. CURRENT HIGH PRESSURE
WILL GIVE WAY TO A DRY AND SMALL BUT POWERFUL SHORTWAVE THAT MOVES
THROUGH DURING THE EARLY MORNING AND EARLY AFTERNOON. WHILE THERE
IS NOT MUCH MOISTURE ASSOCIATED WITH THIS LOW...THE STRONG COLD
AIR ADVECTION...THE 250MB SPEED MAX OF 80-PLUS KT OVERHEAD DURING
THE FRONTAL PASSAGE...THE 14MB SLP GRADIENT ACROSS SOUTHERN
IDAHO...AND 40KT 700MB WIND ALL POINT TO VERY WINDY CONDITIONS
DURING THE DAY SAT. LOCAL WIND STUDY INDICATED STRONG LIKELIHOOD
OF WIND ADVISORY CONDITIONS...STARTING SHORTLY AFTER 28/12Z AND
ENDING PRIOR TO 29/00Z. HAVE ISSUED A WIND ADVISORY FOR THE VALLEY
LOCALES AND THE ONE MOUNTAIN ZONE WHICH WILL RECEIVE VERY WINDY
CONDITIONS SOMEWHERE OTHER THAN THE RIDGES...THE SOUTH CENTRAL
HIGHLAND ZONE 22. EXPECT ONLY LIGHT PRECIPITATION AND SNOW TO STAY
ABOVE 8500 FEET ELEVATION. MUCH COLDER BEHIND THE FRONT FOR SAT
NIGHT...BUT THE CLEAR SKIES WILL ALLOW WARMING TO DEVELOP BY SUN.
MESSICK

.LONG TERM...MONDAY THROUGH FRIDAY NIGHT. THE UPPER RIDGE OVER THE
NORTHERN ROCKIES ON MON WILL BE PUSHED OFF TO THE EAST AS A VIGOROUS
UPPER TROF MOVES INTO THE PAC NW. LIGHT SNOW MOVES INTO THE CENTRAL
MTNS MON NIGHT AND SPREADS TO THE REST OF THE MTNS ON TUE...WITH THE
BEST CHANCES REMAINING IN THE CENTRAL MTNS. LOWER ELEVATIONS WILL
SEE RAIN. THE SYSTEM MOVES FAST SO PRECIP AMOUNTS WILL BE MINIMAL.
STRONG WINDS ARE EXPECTED WITH THE COLD FRONTAL PASSAGE ON TUE.
ANOTHER FAST MOVING UPPER TROF/COLD FRONT MOVES INTO THE PAC NW WED
NIGHT...AND DROPS INTO ID ON THU. LIGHT SNOW SPREADS TO THE MTNS AND
RAIN/SNOW MIX IN THE SNAKE PLAIN ON THU. ANOTHER FAST MOVING
SYSTEM...SO STRONG WINDS ON THU AND CLEARING BY FRI MORN. FRI AND
FRI NIGHT ARE EXPECTED TO BE DRY. COOLER TEMPS WILL PREVAIL TUE THRU
FRI NIGHT. HEDGES
&&

.AVIATION...THE UPPER RIDGE OVER THE WEST WILL MAINTAIN VFR
CONDITIONS THRU TONIGHT. HEDGES
&&




&&

.PIH WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY FROM 8 AM TO 5 PM MDT SATURDAY IDZ017-020-021.

WIND ADVISORY FROM 8 AM TO 5 PM MDT SATURDAY IDZ022.

&&

$$







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