Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 220906
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
206 AM MST THU JAN 22 2015

.SHORT TERM...TODAY THROUGH SATURDAY. IT APPEARS WE MAY HAVE
BROKEN THE CYCLE FOR NOW IN TERMS OF MORE WIDESPREAD FOG AND LOW
CLOUDS ACROSS THE SNAKE PLAIN. THE AIR EVEN UNDER THE INVERSION IS
OVERALL DRIER AND IN MOST PLACES WE WON`T LIKELY REACH THE POINT
WHERE THIS WILL FORM TODAY. THAT SAID...THERE IS STILL SOME OUT
THERE ACROSS UPPER SNAKE PLAIN AND SOME TRYING TO TRICKLE INTO THE
MAGIC VALLEY FOR THE NORTHEAST AND ALSO CLOSER TO THE SNAKE RIVER.
WE WILL MAINTAIN A LITTLE BIT HIGHER CLOUD COVER AND PATCHY
FREEZING FOG IN THOSE AREAS TO ACCOUNT FOR THE POSSIBILITY OF IT
STILL HAPPENING...BUT IT VERY WELL MAY BE CONFINED TO ALONG THE
RIVERS AND ALSO AROUND THE ARCO DESERT. OTHERWISE WE WILL SEE SOME
HIGHER CLOUDS MOVING OVERHEAD TODAY. IT WILL REMAIN MILD ABOVE THE
INVERSION WITH HIGHS PUSHING TOWARD THE LOW 40S IN SOME SPOTS
ACROSS THE CENTRAL MOUNTAINS AND SOUTH OF BURLEY. OTHERWISE...IT
SHOULD REMAIN AT OR BELOW FREEZING WHERE THE INVERSION HOLDS.

A WEAK SYSTEM IS STILL POISED TO CROSS THE STATE TONIGHT AND
FRIDAY. THIS WILL BRING A SURGE OF MOISTURE INTO OUR AREA...BUT
MAINLY IN THE FORM OF HIGH AND MID LEVEL CLOUDS. THERE SHOULD BE A
FEW SHOWERS BUT MAINLY NEAR THE DIVIDE AND NEAR THE LEMHI COUNTY
BORDER. THIS WILL LIKELY WEAKEN THE INVERSION BUT NOT BREAK IT. WE
MAY STILL SEE SOME PATCHY FOG/STRATUS WHERE IT`S STRONGEST ACROSS
THE UPPER PLAIN. TEMPERATURES WILL WARM UP A BIT OVERALL BUT STILL
MAINTAIN A SIMILAR PATTERN AS THE PAST COUPLE OF DAYS. THE RIDGE
BEGINS TO REBOUND HEADING INTO THE WEEKEND. WITH MOISTURE RIDING
THE EDGE OF THE RIDGE...WE HAVE LIGHT RAIN AND SNOW ACROSS
PORTIONS OF THE CENTRAL MOUNTAINS AND UPPER SNAKE HIGHLANDS. WHILE
SOME LIGHT MOUNTAIN SHOWERS COULD CREEP FARTHER SOUTH...THERE IS
LOW CONFIDENCE RIGHT NOW IN THAT HAPPENING. WITH THE INVERSION
LIKELY HOLDING ON ESPECIALLY ACROSS THE UPPER PLAIN...WE WILL
MAINTAIN STATUS QUO WITH PATCHY FOG AND LOWER TEMPERATURES IN THAT
AREA.  KEYES

.LONG TERM...SATURDAY NIGHT THROUGH WEDNESDAY. A MINOR DISTURBANCE
ROUNDS THE TOP OF A HIGH PRESSURE RIDGE OVER THE GREAT BASIN AND IS
EXPECTED TO JUST BRUSH THE ISLAND PARK AREA WITH A SLIGHT CHANCE OF
SNOW SATURDAY NIGHT AND EARLY SUNDAY MORNING...OTHERWISE THE RIDGE
WILL DOMINATE THE WEATHER PATTERN THROUGH TUESDAY MORNING. INVERSION
CONDITIONS WILL SUPPORT SOME PATCHY FOG IN THE OVERNIGHT HOURS.
MODELS SHOW GOOD AGREEMENT IN BRINGING A DISTURBANCE NORTHWARD FROM
NEAR SOUTHERN CALIFORNIA FOR A CHANCE OF VALLEY RAIN AND MOUNTAIN
SNOW IN IDAHO TUESDAY AND WEDNESDAY. RS


&&

.AVIATION...AREAS OF LOW LIFR STRATUS AND PATCHY FOG IN THE ARCO
DESERT WITH A SLIGHT NORTHEASTERLY SURFACE WIND THIS MORNING. THE
WINDS FAVOR SOME DRIFTING OF THE STRATUS /FOG DOWN THE THE SNAKE
PLAIN TOWARDS KBYI FOR AT LEAST A TEMPORARY CEILING AND VISIBILITY
RESTRICTION. NORTH WINDS SHOULD KEEP FOG OFF THE FIELD AT KIDA. FOR
KPIH WINDS ARE NEAR ZERO...WILL DEPEND ON FOG BEING ABLE TO CROSS
THE AMERICAN FALLS RESERVOIR. EXPECT SOME REPEAT OF THIS AGAIN
FRIDAY MORNING. RS

&&

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

$$







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