Area Forecast Discussion
Issued by NWS Pocatello, ID

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000
FXUS65 KPIH 211925
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
125 PM MDT SAT MAR 21 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY.
WEAK UPPER LEVEL SHORT WAVE MOVING THROUGH TODAY IS PRODUCING
MAINLY CLOUD COVER WITH NO MEASURABLE PRECIP SO FAR IN THE PIH
FORECAST AREA. BETTER CHANCE OF PRECIP WILL OCCUR OVERNIGHT IN THE
EAST CENTRAL MOUNTAINS AND NEAR THE MT AND WY BORDERS. A SECOND
UPPER LEVEL SHORT WAVE WILL SWING ACROSS THE AREA SUNDAY AFTERNOON
FOR ANOTHER THREAT OF SHOWERS. LITTLE OR NO ACCUMULATION IS
EXPECTED WITH THESE SYSTEMS. A THIRD AND STRONGER SYSTEM WILL
BEGIN TO PUSH INTO SE IDAHO EARLY MONDAY AND WILL LINGER THROUGH
TUESDAY MORNING. SNOW LEVELS START OUT AROUND 6500 TO 7500 FEET EARLY
MONDAY AND FALL TO 4000 TO 5000 FEET BY EARLY TUESDAY.
PRECIPITATION WILL BE FOCUSED PRIMARILY IN THE CENTRAL MOUNTAINS
AND ALONG THE MT BORDER AND EASTERN HIGHLANDS WITH TOTAL SNOW
AMOUNTS OF A DUSTING IN THE SNAKE PLAIN TO 3 TO 8 INCHES ABOVE
6500 FEET BETWEEN SUNDAY NIGHT AND TUESDAY MORNING. HIGH
TEMPERATURES WILL FALL 15 TO 20 DEGREES BETWEEN TODAY AND TUESDAY
SO A RETURN TO MORE SEASONAL CONDITIONS. WINDY CONDITIONS ALSO
EXPECTED ON MONDAY WITH 20 TO 30 MPH WIND SPEEDS IN THE SNAKE
PLAIN. DSH

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY.
AMPLIFYING RIDGE WILL BUILD OVER THE PACIFIC COAST STARTING
WEDNESDAY MORNING...BUT MOISTURE WILL CONTINUE TO STREAM INTO
SOUTHEAST IDAHO UNTIL WEDNESDAY NIGHT. GFS HOLDS ON TO MOISTURE
OVER CENTRAL MTNS THROUGH THURSDAY MORNING...THEN SHOWS A DRYING
TREND AS UPPER RIDGE SHIFTS EASTWARD. DROPPED POPS SLIGHTLY DUE TO
THE INFLUENCE OF THE RIDGE AND MAINTAINED FAIRLY WARM TEMPS. BOTH
GFS/ECMWF PUSH A SHORTWAVE INTO NORTHERN IDAHO SATURDAY MORNING.
AS A RESULT...BEGAN INTRODUCING SOME SLIGHT CHANCE POPS ALONG OUR
NORTHERN BORDER. HINSBERGER

&&

.AVIATION...FOCUS WILL BE ON WINDS TODAY AS A FAIRLY WEAK COLD FRONT
MAKES ITS WAY THROUGH SOUTHEAST IDAHO THIS AFTERNOON. WINDS GUSTS
AROUND 20 TO 25 KTS ARE EXPECTED WITH BRIEF STRONGER GUSTS IN THE
VICINITY OF THE FRONT. WITH A DRY AIRMASS IN PLACE AT THE
SURFACE...WE ARE NOT EXPECTING MUCH IN THE WAY OF PRECIPITATION.
EXPECT WINDS TO TAPER OFF THIS EVENING. HINSBERGER.

&&

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

&&

$$







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