Area Forecast Discussion
Issued by NWS Pocatello, ID

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000
FXUS65 KPIH 290831
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
231 AM MDT MON SEP 29 2014

.DISCUSSION...SOUTHERN IDAHO WILL BE IMPACTED BY A SERIES OF UPPER
DISTURBANCES ROTATING AROUND A LOW SITUATED OVER THE UT/NV BORDER
THIS MORNING. ANOTHER SHORT WAVE IS SEEN APPROACHING THE SOUTHERN BC
COAST. MODELS SHOW THE UPPER LOW LIFTING OUT OF UTAH TODAY AND
FILLING AS THE SECOND SHORT WAVE APPROACHES. AS THE LOW LIFTS
OUT...ANOTHER ROUND OF SHOWERS CURRENTLY OVER SOUTHWESTERN IDAHO
WILL BE DRIVEN INTO THE CENTRAL IDAHO MOUNTAINS THIS AFTERNOON.
ISOLATED THUNDERSTORMS CANNOT BE RULED OUT AS WE KEEP SOME
INSTABILITY ON ACCOUNT OF THE LOW. THE UPPER TROUGH IN BC WILL
LIKELY BRING SOME MORE WET WEATHER TO SOUTHEAST IDAHO AND EVEN
SOME STRONG WINDS AS A SURFACE FRONT TRIES TO ORGANIZE ACROSS THE
SNAKE PLAIN.

THE REST OF THE WEEK WILL BE CHARACTERIZED BY HIGH PRESSURE WITH
DRIER WEATHER. THE JET WILL BECOME MORE WESTERLY ALOFT WITH THE
STORM TRACK STAYING JUST TO OUR NORTH. DRY WEATHER SHOULD CONTINUE
INTO THE WEEKEND AS UPPER RIDGING PERSISTS. HINSBERGER
&&

.AVIATION...DEEP UPPER LOW CENTERED OVER NEVADA EARLY THIS MORNING
WILL EJECT NORTHEAST ACROSS EAST IDAHO TODAY. SOME INSTABILITY
PRESENT MAINLY SNAKE PLAIN AND EAST THIS AFTERNOON. SHOWERS WILL
BECOME WIDESPREAD AGAIN TODAY WITH ISOLATED THUNDERSTORMS THIS
AFTERNOON AND EARLY EVENING. A MIX OF VFR/MVFR CEILINGS EXPECTED
TODAY WITH THE LOWER CEILINGS ASSOCIATED WITH PRECIPITATION. UPPER
TROUGH SHIFTS NORTHEAST OVERNIGHT. LINGERING SHOWERS OVERNIGHT BUT
WILL ALSO SEE BETTER CHANCE FOR FOG BEHIND DEPARTING LOW. CONDITIONS
WILL LIKELY SHIFT TO MIX OF MVFR/IFR ESPECIALLY AFTER 06Z FOR LOW
LYING AREAS. WILL TREND TERMINALS TOWARD LOWER HEIGHTS AT
KIDA/KPIH/KBYI OVERNIGHT BUT KEEP ABOVE IFR AT THIS TIME. DMH
&&

.FIRE WEATHER...DEEP UPPER LOW EJECTS ACROSS EAST IDAHO TODAY AS
OPEN TROUGH. DEEP MOISTURE STILL IN PLACE SO WIDESPREAD SHOWERS
CONTINUE TODAY. SOME INSTABILITY PRESENT THIS AFTERNOON FOR ISOLATED
THUNDERSTORMS. UNSETTLED CONDITIONS CONTINUE THROUGH WEDNESDAY WITH
A SERIES OF SHORTWAVES AND SURFACE COLD FRONTS. BEST CHANCE FOR
WINDS OCCURS ON TUESDAY. DRIER/WARMER CONDITIONS ARRIVE FOR THURSDAY
AND BEYOND WITH UPPER RIDGE IN PLACE OVER EAST IDAHO. DMH
&&

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

$$






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