Area Forecast Discussion
Issued by NWS Boise, ID

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000
FXUS65 KBOI 210947
AFDBOI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
347 AM MDT TUE OCT 21 2014

.SHORT TERM...TODAY THROUGH WEDNESDAY...UPPER LOW CENTER OVER N NV
WITH WIDESPREAD PRECIPITATION NORTH OF IT OVER SW IDAHO...WILL
LIFT N/NE TODAY. ISOLATED THUNDERSTORMS ARE EXPECTED AS WELL
THOUGH BY AFTERNOON THE THREAT IS LIMITED TO THE CENTRAL ID MTNS.
ADDTIONAL QPF IN THE MOUNTAINS 3AM- 6PM WILL BE AROUND TWO-
THIRDS OF AN INCH. SNOW LEVELS WILL BE FALLING TO AROUND 7500 FEET
THIS MORNING EXCEPT LOCALLY 6K FT THIS MORNING ACROSS
BAKER/ADAMS/VALLEY AND COUNTIES AND THEN TO AROUND 6500 FT THIS
EVENING. NEAR NW BAKER COUNTY ALREADY HAS 30F AT ANTHONY LAKES SKI
AREA. COOL AND BREEZY THIS AFTERNOON WITH CENTRAL ID MTN SHOWERS THEN
MOSTLY DRY AND COOL ON WEDNESDAY AS A BUBBLE SURFACE HIGH SHIFTS
ACROSS THE REGION. HIGH WILL ALSO BRING LIGHT WINDS WHICH WILL
COMBINE WITH ABUNDANT LOW LEVEL MOISTURE FOR AREAS OF FOG MAINLY
ACROSS THE WEST CENTRAL/BOISE MTNS EARLY WED. AM. TRANSIENT
SHORTWAVE RIDGE WEDNESDAY WILL BRING NEAR NORMAL TEMPS AND
ABUNDANT SUN.

.LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...VERY ACTIVE WEATHER
UPCOMING FOR SOUTHWEST IDAHO AND SOUTHEAST OREGON. THE SHORTWAVE
RIDGE WHICH BUILDS OVER THE AREA WEDNESDAY WILL QUICKLY GIVE WAY
TO ZONAL FLOW FROM A LARGE UPPER LEVEL LOW IN THE GULF OF ALASKA.
MOIST WSW FLOW WILL PROVIDE PRECIPITATION FOCUSED MAINLY OVER THE
HIGHER TERRAIN WITH THE MAGIC VALLEY MAINLY DRY. FRIDAY AFTERNOON
A DEEP UPPER LEVEL TROUGH DIGS ALONG THE WEST COAST AND THE WINDS
ALOFT BECOME SOUTHERLY. A WARM FRONT WILL MOVE NORTHWARD
THROUGHOUT THE DAY ON FRIDAY...DRYING OUT FROM SOUTH TO NORTH IN
THE AFTERNOON. SATURDAY LOOKS DRY AHEAD OF THIS SYSTEM WITH
INCREASING HIGH CLOUDS. THE TROUGH WILL WEAKEN AND MOVE INLAND
SUNDAY MORNING WITH SNOW LEVELS DROPPING TO 5000-6000 FT WITH
INCREASED CHANCES OF PRECIPITATION MAINLY OVER THE HIGHER TERRAIN.
A WEAK RIDGE BUILDS ON MONDAY FOR DRY CONDITIONS. FRIDAY AND
SATURDAY LOOKS TO BE THE WARMEST DAY OF THE EXTENDED PERIOD WITH
TEMPERATURES AROUND 10 DEGREES ABOVE NORMAL. TEMPERATURES GO
SLIGHTLY BELOW NORMAL SUNDAY AND BEYOND.

&&

.AVIATION...VALLEYS LOW END VFR WITH SHOWERS DECREASING AFTER 15Z.
MOUNTAINS WIDESPREAD MTNS OBSCURED AREAS MVFR CIG AND RAIN
SHOWERS. ABOVE 6500 FT AREAS IFR SNOW AND RAIN SHOWERS...IMPROVING
AFTER 03Z. PATCHY IFR FOG EARLY WED...ALSO AFFECTING KMYL 10-15Z
WED. VFR PARTLY SUNNY AFTER 18Z WED. SURFACE WINDS NW AVERAGE
10-20 KTS...GUSTS TO 35KTS KTWF/KJER. WINDS BECOMING LIGHT UP TO
10KTS AFTER 06Z. WINDS ALOFT SW TO NW 20 KTS.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...NONE.
OR...NONE.

&&

$$

WEATHER.GOV/BOISE

SHORT TERM...VM
LONG TERM....KA
AVIATION.....VM


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