Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 181406
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
807 AM MDT THU SEP 18 2014

.SHORT TERM...TODAY THROUGH SATURDAY. QUICK UPDATE THIS MORNING TO
EMBELLISH THUNDERSTORM WORDING THIS AFTERNOON OVER CASSIA COUNTY AND
ALONG MACKAY TO DILLON CORRIDOR WHERE BEST SHEAR RESIDES AND
CONSEQUENTLY STRONGEST THUNDERSTORMS EXPECTED THIS AFTERNOON. SEE
PREVIOUS DISCUSSION BELOW. HUSTON

STRONG SOUTHWEST FLOW ALOFT AHEAD OF UPPER TROF MOVING ONTO
PACIFIC COAST TODAY. EXPECT SHOWERS AND THUNDERSTORMS ACROSS THE
ENTIRE REGION WITH THE HEAVIEST PRECIPITATION EXPECTED IN THE
SOUTHERN AND EASTERN HIGHLANDS. AFTER SOME RECORD BREAKING HIGH
TEMPERATURES YESTERDAY EXPECT MUCH COOLER CONDITIONS TODAY BUT
STILL WELL ABOVE SEASONAL NORMALS BUT ABOUT 10 DEGREES COOLER THAN
WEDNESDAY. EXPECT SOME LINGERING SHOWERS FRIDAY MORNING IN THE
SOUTHEAST CORNER OF THE STATE WITH DRYING OUT BY THE AFTERNOON AND
COMPLETELY DRY CONDITIONS SATURDAY WITH UPPER LEVEL RIDGE OVERHEAD.
GK

.LONG TERM...SUNDAY THROUGH THURSDAY.
UPPER LOW MOVES NORTH FROM CALIFORNIA INTO NORTHERN NEVADA SUNDAY
AFTERNOON AND EXPECT SHOWERS AND THUNDERSTORMS TO MOVE BACK INTO
SOUTHEAST IDAHO SUNDAY THROUGH MONDAY. EUROPEAN IS MUCH WETTER AND
MORE WIDESPREAD WITH RAIN THEN GFS WITH GFS MAINLY TARGETING
SOUTHERN HIGHLANDS. GRIDS HAS INCREASED PRECIPITATION CHANCES SUNDAY
AND MONDAY. GFS MUCH QUICKER WITH NEXT TROF BRINGING IN MORE
PRECIPITATION WEDNESDAY AND THURSDAY WITH EUROPEAN MUCH SLOWER
HOLDING OFF UNTIL FRIDAY. FOR NOW BROUGHT BACK IN SOME
PRECIPITATION THURSDAY. TEMPERATURES SHOULD BE ABOVE NORMAL WITH
PERHAPS SOME COOLING VERY LATE IN THE PERIOD BASED ON TIMING OF NEXT
TROF. GK
&&

.AVIATION...A COLD FRONT MOVING THROUGH THE REGION WILL PRODUCE
SCATTERED SHOWERS AND THUNDERSTORMS TODAY. EXPECT CEILINGS TO REMAIN
VFR HOWEVER. SOME WIND GUSTS TO 20KTS IS POSSIBLE ACROSS THE UPPER
HALF OF THE SNAKE PLAIN THIS AFTERNOON. VALLE
&&

.FIRE WEATHER...A COLD FRONT WILL MOVE THROUGH THE REGION TODAY.
EXPECT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT THE
DAY AND INTO THE NIGHT. HIGH PRESSURE WILL BUILD INTO THE AREA ON
FRIDAY AND PRODUCE DRY WEATHER FOR SATURDAY. VALLE
&&


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

$$






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