536
FXUS65 KPIH 091016
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
316 AM MST TUE FEB 9 2010
SHORT TERM
TODAY THROUGH THURSDAY NIGHT.
FOG AND STRATUS MAINLY LIMITED TO POCATELLO AIRPORT REGION THIS
MORNING WITH HIGHER CLOUDS OVER MUCH OF THE REGION WEST IF
INTERSTATE 15. QUIET WEATHER THROUGH WEDNESDAY AS UPPER RIDGE
OVERHEAD TODAY AS UPPER LOW SLIDES SOUTH OFF THE CALIFORNIA COAST.
STRONG INVERSIONS PRESENT IN VALLEYS IN THIS PATTERN. PACIFIC TROF
COMES ON SHORE IN PACIFIC NORTHWEST WEDNESDAY AND MOISTURE FROM
THAT SYSTEM SPILLS OVER RIDGE INTO IDAHO. THIS MAY CAUSE SOME
LIGHT SNOW SHOWERS MAINLY IN MOUNTAINS WEDNESDAY NIGHT THROUGH
THURSDAY NIGHT. EXPECT SEASONAL TO SLIGHTLY BELOW NORMAL DAYTIME
HIGH TEMPERATURES THROUGH THURSDAY WITH MAINLY LIGHT WINDS.
GK
LONG TERM
FRIDAY THROUGH MONDAY. SHORT WAVE ENERGY NEAR 180W
CONTINUES TO ADVANCE TOWARDS THE NORTHEASTERN PACIFIC SETTING UP AND
UNSETTLED PERIOD FOR SOUTHEAST IDAHO BEGINNING ABOUT THURSDAY.
MODELS CONTINUE TO HAVE SOME DIFFICULTY WITH SPLITTING ONSHORE FLOW.
BETWEEN THURSDAY AND SATURDAY AT LEAST THREE DIFFERENT EMBEDDED
DISTURBANCES ARE EVIDENT. THE GFS APPEARS WEAKER WITH THE ONE ON
THURSDAY AND STRONGEST WITH THE DISTURBANCE FRIDAY NIGHT AND
SATURDAY. THE ECM IS WEAKER EARLY THURSDAY...STRONGER WITH THE
DISTURBANCE FRIDAY AND AND WEAKER AGAIN ON SATURDAY. MODEL QPF STILL
SUPPORTS MODEST SNOW AMOUNTS PERHAPS UP TO A HALF FOOT IN THE
MOUNTAINS OVER A COUPLE OF DAYS. RS
AVIATION
LOW STRATUS AND FOG REMAINS ENTRENCHED IN THE UPPER
SNAKE PLAIN THIS MORNING WITH SUBTLE AND DIFFICULT TO FORECAST 1-3
KT CHANGES IN WIND SPEED CAUSING VISIBILITY AND CEILINGS TO VARY
QUITE A BIT. THERE IS A MID LEVEL CLOUD DECK ABOUT 10K FT MSL
VICINITY OF KTWF AND KBYI ADVANCING TOWARDS THE ARCO DESERT IN
SATELLITE IMAGERY. THE NAM12 700 MB LAYER RH SHOWS THIS MOVING
TOWARDS ISLAND PARK THROUGH MID DAY AHEAD OF A MINOR EMBEDDED WAVE
CROSSING CENTRAL IDAHO THAT CAN BE SEEN IN WATER VAPOR IMAGERY. THE
PRESENCE OF THIS CLOUD DECK HAS LIMITED FOG DEVELOPMENT AT KBYI SO
FAR. BY EARLY AFTERNOON THIS MID LEVEL CLOUD DECK MOVES WELL TO THE
NORTHEAST AND THE SURFACE BASED TEMPERATURE INVERSION REMAINS PRETTY
STRONG INTO WEDNESDAY MORNING. THEREFORE PATCHY FOG COULD SHOW UP
LATE AFTERNOON OR EARLY EVENING AS IT DID YESTERDAY AND SEEMS A
PRETTY GOOD BET OVERNIGHT. THE FLY IN THE OINTMENT IS HIGH LEVEL
CLOUDS IN WESTERN NEVADA THAT SHOULD REACH THIS AREA BY WEDNESDAY
MORNING. RS
PIH WATCHES/WARNINGS/ADVISORIES
NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page