Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 312143
AFDBOI

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE BOISE ID
233 PM MST SAT JAN 31 2015

.SHORT TERM...FIRST TROUGH IN THE NORTH PACIFIC WILL COME INLAND
BEGINNING SUNDAY BUT WILL HAVE TO MOVE THROUGH THE EVER-PRESENT
LONG WAVE RIDGE OVER WRN NORTH AMERICA.  PCPN WILL BEGIN IN OUR
NRN ZONES SUNDAY AFTERNOON WITH BULK OF IT SUNDAY EVENING IN
IDAHO ZONES NORTH OF THE SNAKE BASIN.  AFTER A SHORT BREAK MONDAY
MORNING A WETTER PACIFIC TROUGH WILL BRING MORE PCPN MONDAY
AFTERNOON TO ALL ZONES.  TEMPS TONIGHT AND SUNDAY WILL CHANGE
LITTLE FROM PREVIOUS DAYS...BUT SUNDAY NIGHT WILL BE MILDER AND
MONDAY A LITTLE COOLER DUE TO CLOUDS AND PCPN.  POPS WILL BE CLOSE
TO MET MOS...AS MAV MOS CONTINUES TO SHOW A DRY BIAS.  PATCHY FOG
AGAIN IN THE VALLEYS TONIGHT AND SUNDAY MORNING.

.LONG TERM...MONDAY NIGHT THROUGH SATURDAY. MOIST WESTERLY FLOW WILL
BRING SEVERAL ROUNDS OF LIGHT PRECIPITATION TO SOUTHEAST OREGON AND
SOUTHWEST IDAHO THROUGH WEDNESDAY. AN EXITING SHORT WAVE WILL KEEP
SHOWERS ACROSS SW IDAHO MONDAY NIGHT THROUGH TUESDAY. UPPER RIDGE
REBUILDS NORTH ACROSS THE AREA ON WEDNESDAY PUSHING THE MOISTURE TOP
OUT OF THE REGION. SNOW LEVELS WILL BE HIGH ENOUGH FOR BOTH RAIN AND
SNOW ACROSS MOUNTAIN VALLEYS...INCLUDING THE LONG VALLEY AND CAMAS
PRAIRIE. DRIER THURSDAY WITH A PACIFIC RIDGE OVER THE AREA. RIDGE
WILL SHIFT EASTWARD ON FRIDAY...ALLOWING SOUTHWESTERLY FLOW ON THE
BACK SIDE OF THE RIDGE TO TRANSPORT LOW-LEVEL MOISTURE NORTHEAST
INTO THE AREA. EXPECT WET CONDITIONS FRIDAY NIGHT THROUGH EARLY
SUNDAY.

&&

.AVIATION...LIFR-IFR STRATUS AT KBNO AND KJER SHOULD DISSIPATE BY
22Z. IFR STRATUS SHOULD REBUILD AT KJER TONIGHT. OTHERWISE...VFR
CONDITIONS AND LIGHT W/NW SURFACE WINDS WILL PREVAIL. HIGH CLOUDS
INCREASING EARLY SUNDAY MORNING COULD KEEP FOG/STRATUS FROM
REFORMING IN SOUTHEAST OREGON.  FOG IS STILL POSSIBLE IN THE
VALLEYS OF SW IDAHO. NORTHWESTERLY WINDS ALOFT WILL AVERAGE 20 KTS
THROUGH 10K FT MSL. PATCHY LIFR FOG TO RETURN SUNDAY MORNING.

&&

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

&&

$$

WEATHER.GOV/BOISE

SHORT TERM...LC
LONG TERM....JDS
AVIATION.....JDS


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