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410
FXUS65 KPIH 200840
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
240 AM MDT MON OCT 20 2014

.DISCUSSION...

HIGH PRESSURE WILL PRODUCE ONE MORE DAY OF DRY WEATHER ACROSS THE
REGION TODAY. THE NEXT SYSTEM WILL MOVE ONSHORE LATE THIS
AFTERNOON AND ADVANCE TOWARD IDAHO THROUGH THE NIGHT. EXPECT CLOUD
COVER AND SHOWERS TO INCREASE IN COVERAGE THROUGH THE OVERNIGHT
HOURS. BOTH GFS AND NAM SHOWING MORE COVERAGE THAN PREVIOUS
RUNS...ALTHOUGH BOTH MODELS CONTINUE TO SUPPORT HEAVIEST
PRECIPITATION OVER THE CENTRAL MOUNTAINS. THIS SYSTEM WILL THROUGH
THE STATE ON TUESDAY. SCATTERED TO NUMEROUS SHOWERS IS POSSIBLE
ALL DAY WITH THE BEST CHANCES OVER THE MOUNTAINS AND HIGHLANDS.
QPF AMOUNTS OF UP TO HALF AN INCH IS POSSIBLE OVER THE CENTRAL
MOUNTAINS AND NORTHEAST HIGHLANDS. ELSEWHERE...AMOUNTS WILL BE
BETWEEN A TENTH OF AN INCH TO A QUARTER OF AN INCH. SNOW LEVELS
WILL BE FALLING THROUGH THE DAY ON TUESDAY AS A COLD FRONT MARCHES
THROUGH THE AREA. SNOW LEVELS WILL START AROUND 10000 FEET BUT
QUICKLY FALL TO AROUND 8000 FEET. SOME OF THE HIGHER PEAKS COULD
SEE A COUPLE INCHES OF SNOW FROM THIS SYSTEM. THERE IS SOME
POTENTIAL FOR STRONG WINDS ON TUESDAY...BUT THAT WILL DEPEND ON
CLOUD COVER AND PRECIPITATION COVERAGE. THE NAM IS NOT SHOWING AS
MUCH WIND BECAUSE IT HAS MORE PRECIPITATION WITH IT. THE DRIER GFS
SUPPORTS MARGINAL WIND ADVISORY CONDITIONS ACROSS THE SNAKE PLAIN.
FOR NOW FAVORING THE LESS WINDY NAM BECAUSE BOTH MODELS HAVE
INCREASED THEIR PRECIPITATION COVERAGE FROM PREVIOUS RUNS.

DRIER WEATHER WILL RETURN FOR MOST OF THE AREA FOR THE REMAINDER
OF THE WEEK. THE PACIFIC NORTHWEST WILL BE UNDER SOUTHWEST FLOW
WHICH WILL BRING IN SOME MOISTURE THROUGH OREGON AND POSSIBLY
CLICK PARTS OF THE CENTRAL MOUNTAINS ON THURSDAY. NO SIGNIFICANT
RAINFALL IS EXPECTED THOUGH. THE NEXT SIGNIFICANT SYSTEM ARRIVES
IN THE FORM OF A FAST MOVING COLD FRONT. THIS WILL BRING SHOWERS
TO THE REGION ONCE AGAIN ALONG WITH COOLER TEMPS...MAY SEE TEMPS
CLOSER TO NORMAL FOR NEXT WEEKEND.

VALLE

&&

.AVIATION...VFR CONDITIONS EXPECTED TO PREVAIL THRU TONIGHT. A STORM
SYSTEM MOVING INTO THE PAC NW TODAY WILL BEGIN TO SPREAD PRECIP INTO
THE CENTRAL IDAHO MTNS AND EASTERN MAGIC VALLEY BY TUE MORN. HEDGES

&&

.FIRE WEATHER...A STORM SYSTEM WILL MOVE INTO THE PAC NW TODAY...
SPREADING SHOWERS INTO THE CENTRAL IDAHO MOUNTAINS BY TUESDAY
MORNING. A COLD FRONT PASSING THROUGH IDAHO TUESDAY MORNING WILL
SPREAD SHOWERS ACROSS THE REST OF THE REGION...ALONG WITH COOLER
TEMPERATURES AND STRONGER SOUTHWEST WINDS. SHOWERS ARE AGAIN
POSSIBLE IN THE CENTRAL MOUNTAINS ON THURSDAY. HEDGES

&&

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

$$





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