Area Forecast Discussion
Issued by NWS Pocatello, ID

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000
FXUS65 KPIH 212114
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
214 PM MST SUN DEC 21 2014

.SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT. PRECIPITATION RATES HAVE
DROPPED FROM OVERNIGHT AND TRENDS ON RADAR SUPPORT LOWER AMOUNTS
GOING FORWARD. SNOW LEVELS HAVE RISEN TODAY FROM AROUND 5800 TO
6000 FEET TO AROUND 6500 TO 7000 FEET AND SEVERAL MOUNTAIN VALLEY
LOCATIONS HAVE CHANGED FROM SNOW TO RAIN TODAY. GOING FORWARD
EXPECT PRECIPITATION AMOUNTS TO CONTINUE TO DECLINE AS SNOW LEVELS
FALL TO 4500 TO 5000 FEET OVERNIGHT. PRECIPITATION EXPECTED TO BE
CONFINED MAINLY TO MOUNTAINOUS REGIONS OVERNIGHT WITH SNOW ENDING
IN THE CENTRAL MOUNTAINS BY MID-MORNING MONDAY AND IN THE EASTERN
HIGHLANDS BY MONDAY EVENING. ADDITIONAL MOUNTAIN SNOW AMOUNTS
OVERNIGHT EXPECTED TO BE BETWEEN 2 AND 5 INCHES. WINDY CONDITIONS
WILL CONTINUE IN THE SNAKE PLAIN WITH SUSTAINED SPEEDS OF 25 TO 35
MPH AND GUSTS TO 50 MPH INTO THIS EVENING. WINDS WILL GRADUALLY
DECREASE OVERNIGHT TO 15 TO 25 MPH IN THE SNAKE PLAIN FOR MONDAY. DSH

.LONG TERM...WEDNESDAY THROUGH SUNDAY. MODELS HAVE CONTINUED TO
BRING A SYSTEM INTO THE AREA WEDNESDAY NIGHT OR CHRISTMAS EVENING
THROUGH CHRISTMAS MORNING. EXPECT 3 TO 5 INCHES OF SNOW FOR THE
MOUNTAINS AND 1 TO 2 INCHES OF SNOW FOR VALLEYS. HOWEVER...THERE IS
SOME UNCERTAINTY STILL WHETHER OR NOT TEMPERATURES WILL DROP FAST
ENOUGH BEFORE THE PRECIPITATION STOPS. VALLEY FLOORS PARTICULARLY
FROM POCATELLO WESTWARD TO BURLEY MAY SEE JUST A TRACE OF SNOW.
LOOK FOR COLDER TEMPERATURES CHRISTMAS DAY TO THE END OF THE PERIOD.
MODELS ARE CONTINUING TO BRING ANOTHER SYSTEM LATE SATURDAY INTO
SUNDAY. THIS SYSTEM WILL BRING LIGHT TO MODERATE SNOW CHANCES. WYATT

&&

.AVIATION...AN EXITING SYSTEM IS BRINGING MODERATE TO STRONG WINDS
FOR THE TAF SITES ACROSS THE SNAKE RIVER PLAIN AND EASTERN MAGIC
VALLEY. LOOK FOR WINDS TO IMPACT TAF SITES UNTIL AROUND MIDNIGHT.
EXPECT LINGERING MVFR CIGS FOR KPIH AND KBYI BEFORE BECOMING VFR
THIS AFTERNOON. CIGS WILL DROP BACK DOWN TO MVFR/IFR FOR KIDA...KPIH
AND KBYI EARLY TO MID EVENING TONIGHT. LOOK FOR KBYI AND KPIH TO
BECOME VFR BY MID TO LATE TOMORROW MORNING AND KIDA TO LIFT TO VFR
BY EARLY TO MID TOMORROW AFTERNOON. KSUN SHOULD STAY VFR THROUGH THE
PERIOD. WYATT

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL MIDNIGHT MST TONIGHT IDZ017-020-021.

WINTER STORM WARNING UNTIL 5 AM MST MONDAY ABOVE 6000 FEET FOR
THE IDZ031-032.

WINTER STORM WARNING UNTIL 5 AM MST MONDAY FOR IDZ018.

WINTER STORM WARNING UNTIL 5 AM MST MONDAY ABOVE 7500 FEET FOR
THE IDZ019-025.

&&

$$







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