Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 161751
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
1051 AM MST TUE DEC 16 2014

.UPDATE...BASED ON TRACK OF PRECIPITATION IN SATELLITE AND
RADAR...ADJUSTED PRECIPITATION AMOUNTS THIS AFTERNOON LOWER ON THE
EAST-SOUTHEAST SIDE OF THE SNAKE PLAIN AROUND BLACKFOOT AND
POCATELLO WHERE SNOW AMOUNTS SHOULD STAY WELL UNDER AND INCH THIS
AFTERNOON...AND A LITTLE HIGHER TOWARDS CRATERS OF THE MOON. RS

&&

.PREV DISCUSSION... /ISSUED 332 AM MST TUE DEC 16 2014/

SHORT TERM...TODAY THROUGH THURSDAY NIGHT. EXPECT LIGHT SNOW
ACROSS THE AREA TODAY AS A WEAK TROUGH MOVES THROUGH. EXPECT 2 TO
4 INCHES OF SNOW FOR THE LOWER CENTRAL AND LOST RIVER/PAHSIMEROI
MOUNTAINS AS WELL AS THE UPPER SNAKE HIGHLANDS. THE SNAKE RIVER
PLAIN WILL SEE 1 TO 2 INCHES OF SNOW. HOWEVER...THE LOWER SNAKE
RIVER PLAIN MAY SEE LESS THAN AN INCH AND THE EASTERN MAGIC VALLEY
COULD SEE JUST A TRACE BECAUSE OF THE POSSIBILITY OF A RAIN/SNOW
MIX. THE SOUTHERN HIGHLANDS AND CARIBOU HIGHLANDS WILL SEE AROUND
AN INCH WITH TWO INCHES POSSIBLE IN THE MOUNTAINS. EXPECT MOSTLY
DRY CONDITIONS ON WEDNESDAY WITH HIGH PRESSURE RIDGING THOUGH THE
UPPER SNAKE HIGHLANDS WILL CONTINUE TO GET SNOW IN NORTHWEST FLOW.
A WEAK WAVE IN NORTHWEST FLOW WILL ENHANCE THE SNOW OVER THE UPPER
SNAKE HIGHLANDS AND LIKELY BRING SNOW TO THE CARIBOU HIGHLANDS AND
UPPER SNAKE RIVER PLAIN ON THURSDAY. EXPECT NEAR NORMAL
TEMPERATURES TO CONTINUE THROUGH THE PERIOD. WYATT

LONG TERM...FRIDAY THROUGH TUESDAY NIGHT. THE UPPER RIDGE OVER THE
NORTHERN ROCKIES ON FRI WILL MOVE EAST TO THE PLAINS FRI NIGHT...
REPLACED BY STRONGER ZONAL FLOW OFF THE PACIFIC. THIS WILL KEEP A
THREAT OF PRECIP FRI NIGHT THRU SUNDAY. SINCE THE FORCING WILL BE
PRIMARILY OROGRAPHIC...MOST PRECIP WILL BE IN THE CENTRAL MTNS AND
EASTERN HIGHLANDS. NOT LOOKING FOR VERY SIGNIFICANT PRECIP AMOUNTS.
AS A DEEP UPPER LOW MOVES INTO THE GREAT LAKES ON MON...THE FLOW
OVER ID WILL BECOME MORE NWRLY. THE TRAJECTORY IS STILL OFF THE
PACIFIC...SO MOISTURE WILL CONTINUE TO BE AVAILABLE FOR OROGRAPHIC
LIFT. PRECIP WILL CONTINUE OVER THE CENTRAL MTNS AND EASTERN
HIGHLANDS THRU TUE NIGHT...WITH ONLY SLIGHT CHANCES ELSEWHERE. THE
BROAD UPPER RIDGE OVER THE EASTERN PACIFIC WILL MANAGE TO PUSH TEMPS
ABOVE NORMAL MON AND TUE. HEDGES

AVIATION...LIGHT SNOW WILL MOVE BACK INTO S CENTRAL ID BY LATE
MORNING...BRINGING OCNL IFR CONDITIONS TO KSUN. THESE CONDITIONS
WILL SPREAD TO THE REST OF THE TAF SITES BY THIS EVENING WITH OCNL
MVFR CIGS/VIS. HEDGES

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$







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