Area Forecast Discussion
Issued by NWS Pocatello, ID

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000
FXUS65 KPIH 222146
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
246 PM MST MON DEC 22 2014

.SHORT TERM...TODAY THROUGH CHRISTMAS DAY. MODERATE WINDS ARE
CURRENTLY OCCURRING OVER THE EASTERN MAGIC VALLEY AND SOUTHERN
HIGHLANDS WITH WEST NORTHWEST WINDS OF 35 TO 45 MPH. EXPECT THESE
WINDS TO MOVE SLIGHTLY EAST AS WELL OVER THE SOUTHERN SNAKE RIVER
PLAIN. AN WIND ADVISORY IS IN EFFECT UNTIL 9 PM MST THIS EVENING
FOR THESE AREAS. WINDS WILL BE 25 TO 35 MPH OVER THE UPPER SNAKE
RIVER PLAIN AS WELL THIS AFTERNOON INTO EARLY EVENING. WINDS
SUBSIDE QUICKLY THIS EVENING AFTER MIDNIGHT. SOME LIGHT RAIN/SNOW
IS EXPECTED OVER THE SNAKE RIVER PLAIN AND THE EASTERN HIGHLANDS
THIS AFTERNOON INTO EARLY EVENING. FREEZING PATCHY FOG IS POSSIBLE
EARLY TO MID TOMORROW MORNING. TUESDAY INTO EARLY WEDNESDAY EXPECT
DRY CONDITIONS UNDER UPPER LEVEL HIGH PRESSURE RIDGING.

WEDNESDAY NIGHT OR CHRISTMAS EVENING THE NEXT SYSTEM MOVES INTO
THE AREA. MODELS ARE IN GOOD AGREEMENT WITH MODERATE TO
WIDESPREAD PRECIPITATION ACROSS THE AREA. THERE CONTINUES TO BE A
SLIGHT DISAGREEMENT IN SNOW LEVELS BUT THERE IS GENERAL CONSENSUS
THAT IT WILL BE A WHITE CHRISTMAS FOR MOST EVERYONE. SNOW LEVELS
LOOK TO START WARM WITH A SOUTHERLY WINDS BUT COOL OFF QUICKLY
WHEN THE COLD FRONT MOVES THROUGH BY EARLY CHRISTMAS MORNING.
EXPECT 5 TO 10 INCHES OF SNOW FOR CENTRAL MOUNTAINS AND THE
EASTERN HIGHLANDS. LOOK FOR 3 TO 6 INCHES OF SNOW FOR MOUNTAINS
ELSEWHERE. EXPECT 1 TO 3 INCHES OF SNOW FOR THE EASTERN MAGIC
VALLEY AND SOUTHERN SNAKE RIVER PLAIN AND 2 TO 4 INCHES OF SNOW
FOR THE UPPER SNAKE RIVER PLAIN. ADDITIONALLY...LOOK FOR BLOWING
AND DRIFTING SNOW AS THIS SYSTEM MOVES THROUGH. WINDS WILL FAIRLY
STRONG ACROSS THE AREA CHRISTMAS EVE INTO CHRISTMAS DAY. DRIVING
WILL BE HAZARDOUS OVER MUCH OF THE AREA CHRISTMAS EVE INTO
CHRISTMAS. WYATT

.LONG TERM...THURSDAY NIGHT THROUGH NEXT MONDAY.
EXPECT SOME LINGERING SNOW THURSDAY NIGHT IN SOUTHEAST CORNER OF
IDAHO WITH SOME ACCUMULATIONS LIKELY IN THAT AREA.  EXPECT A BIT OF
A BREAK FRIDAY WITH MAINLY DRY CONDITIONS.  BOTH GFS AND EUROPEAN
MODELS ARE SHOWING ANOTHER STORM SYSTEM SLIPPING SOUTHEAST FROM THE
PACIFIC NORTHWEST AND INCREASED PRECIPITATION CHANCES OVER THE
WEEKEND WITH THE CHANCE FOR ACCUMULATING SNOWS SATURDAY THROUGH
SUNDAY.  BOTH MODELS ALSO INDICATE DRY NORTHERLY FLOW ALOFT FOR
MONDAY AND DECREASED PRECIPITATION SIGNIFICANTLY IN GRIDS AT THE END
OF FORECAST PERIOD ON MONDAY.  TEMPERATURES WILL BE VERY SEASONABLE
WITH NEAR NORMAL HIGH TEMPERATURES OR SLIGHTLY BELOW NORMAL THROUGH
THE LONG TERM PERIOD.
GK

&&

.AVIATION...SOME LINGERING MVFR CONDITIONS AT BYI AND PIH SHOULD
DISSIPATE AND EXPECT VFR CONDITIONS THIS EVENING AT ALL TAF SITES.
PUT IN A RETURN OF IFR CONDITIONS AT IDA IN THE EARLY MORNING
HOURS WITH STRATUS RETURNING BUT KEPT EVERYONE ELSE VFR. 15 TO 25
KNOT SUSTAINED WINDS ARE EXPECTED AT BYI THROUGH EARLY EVENING
WITH GUSTS TO 35 KNOTS. WINDS SHOULD INCREASE THIS AFTERNOON AT
PIH AS WELL TO THE SAME LEVEL. OTHER THAN MORNING STRATUS AT IDA
EXPECT VFR CONDITIONS TUESDAY.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 9 PM MST THIS EVENING IDZ017-021-022.

&&

$$






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