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000
FXUS65 KPIH 120942
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
242 AM MST THU DEC 12 2013

.SHORT TERM...TODAY THROUGH SATURDAY NIGHT.
FLATTENED UPPER LEVEL RIDGE WILL MOVE THROUGH STATE TODAY AND
EXPECT DRY CONDITIONS ONCE AGAIN. INVERSION CONDITIONS BECOMING
STRONGER WITH SURFACE HIGH PRESSURE STILL DOMINATING. WILL LIKELY
HAVE WARMER TEMPERATURES AT HIGH ELEVATIONS THAN IN THE SNAKE
RIVER PLAIN. PACIFIC TROF MOVES ON SHORE LATE THIS AFTERNOON AND
EXPECT LIGHT SNOW TO MOVE INTO THE CENTRAL MOUNTAINS VERY LATE
TONIGHT OR FRIDAY MORNING. MOISTURE VERY LIMITED WITH THIS SYSTEM
BUT COULD SEE PERIODS OF LIGHT SNOW MAINLY IN THE MOUNTAINS
THROUGH SATURDAY. SYSTEM FRIDAY SHOULD MIX OUT LOW LEVEL
INVERSIONS BUT DOES DRIVE THROUGH WEAK COLD FRONT SO DO NOT EXPECT
SIGNIFICANT WARMING THROUGH SATURDAY WITH HIGH TEMPERATURES NEAR
OR SLIGHTLY BELOW SEASONAL NORMALS ESPECIALLY IN VALLEYS.
MOUNTAINS SHOULD BE COOLER FRIDAY THAN TODAY.
GK

.LONG TERM...SUNDAY THROUGH THURSDAY NIGHT. WITH AN UPPER RIDGE OVER
THE EASTERN PACIFIC...NW FLOW WILL DOMINATE THRU TUE NIGHT. THIS
WILL RESULT IN ONLY ISOLD SNOW SHOWERS OVER THE CENTRAL MTNS AND NE
HIGHLANDS. TEMPS WILL SLOWLY WARM THRU WED. THE PATTERN CHANGES ON
WED AS ANOTHER SURGE OF COLD AIR BEGINS TO MOVE INTO THE PAC NW. THE
GFS AND ECMWF DIFFER ON THE TIMING...BUT NOT BY MUCH. THE COLD AIR
WILL BE IN PLACE BY THU. PRECIP CHANCES INCREASE WED NIGHT AND THU
AS THE COLD FRONT MOVES THROUGH. PRECIP DIMINISHES IN THE VALLEYS BY
THU NIGHT. TIMING IS STILL QUESTIONABLE...AS THE MODELS HAVE BEEN
WAVERING THIS FAR OUT. HOWEVER...BOTH GFS AND ECMWF ARE CONFIDENT OF
THE PATTERN CHANGE. HEDGES

&&

.AVIATION...SOME LOW CIGS AND PATCHY FOG POSSIBLE EARLY THIS MORNING
IN THE SNAKE RIVER PLAIN...AND AGAIN LATE TONIGHT. OTHERWISE...VFR
CONDITIONS WILL PREVAIL. HEDGES

&&

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

$$