Emmett Weather

135
FXUS65 KBOI 161057
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
357 AM MST Tue Dec 16 2025

.SHORT TERM...Today through Thursday night...Zonal flow
expected over the short term with Pacific moisture moving inland
late this afternoon and evening. Models struggled with the
moisture overnight, predicting precipitation much of the area
earlier this morning, but nothing happened overnight. Expect dry
conditions through this afternoon before moisture streams inland
from the Pacific. Precipitation will become widespread as a warm
front moves in late this evening. Snow levels rise from
6500-7500` MSL this evening to 8000-9000` Wednesday morning
ahead of the cold front. Then, a potent cold front moves through
with heavy showers along the front. Wind gusts of 50 to 60 mph
possible along the cold front on Wednesday morning as it moves
through. The timing is not as favorable as central and eastern
ID to realize the fullest potential of the winds. The strongest
winds will occur during the afternoon, as the front tracks
east, where a high wind warning is in effect for the Camas
Prairie. Precipitation quickly ends behind the front and the
winds slowly subside by Wednesday evening. After a brief lull,
the next warm front moves inland on Thursday morning. This will
bring snow to much of the area in the morning, before changing
to rain below 8000` MSL by Thursday afternoon. Snow levels will
remain lower around the Wallowas, Hells Canyon, and around
McCall until the late evening before rising to around 6000-7000`
MSL as cooler air will hold on longer than the rest of the
area. Snow amounts of 6 to 12 inches possible on Thursday above
6500` MSL before snow levels rise. The Snake Basin including the
Treasure Valley may see snow, but no accumulations expected.

.LONG TERM...Friday through Tuesday...Moisture will persist
over the forecast area on Friday ahead of, and along a cold
front expected by Friday evening. The strong mid-level jet in
place will support upslope precipitation across west-central and
central Idaho terrain, and will aid in valley shadowing
effects. Snow levels will still be on the higher side ahead of
the front, around 5000 feet MSL for the north and 7500 feet for
the south. A sharp gradient in snow levels will develop with the
arrival of the cold front, with 2500 feet for the north and
6500 feet for the south by early Saturday. The lower snow levels
will result in moderate to heavy snow accumulations for those
higher elevations of central ID Friday into Saturday, with
liquid equivalent potentially exceeding an additional 1". This
period of precip over saturated, steep terrain will also
introduce rockslide concerns below the snow line. In addition to
precip, strong surface winds are anticipated across much of the
area Friday ahead of/along the cold front. Gusts will be
strongest across southeast Oregon and the mountains of southwest
Idaho. Meanwhile, temperatures are forecast to stay above
normal Friday, with the coldest air expected across west-
central/central Idaho and northeast Oregon. Temperatures should
lower by several degrees Saturday for all areas behind the cold
front, but above normal temperatures will still persist for
most.

As the aforementioned system exits, another windy and very wet
elongated trough will impact the area beginning early Sunday. The
accompanying plume of subtropical moisture will help to amplify a
ridge over the west as it brings in warmer air. Cool, but above
normal, temperatures on Sunday will jump up to 10-20 degrees above
normal on Monday. Snow levels will be 3500 feet to the north and
7000 feet to the south, then quickly rise to 6000-8000 feet by early
Monday. Though precip chances are forecast area-wide, the west-
central/central Idaho terrain will be favored once again. Periods of
precip will continue Tuesday, with the coldest air remaining to the
northwest of the area.

&&

.AVIATION...Patchy fog/mist around KONO to KMAN through AM. Some mtn
obscuration from low clouds. Otherwise, VFR through afternoon. Rain
arriving from SW after sunset. Snow for elevations above 7-8 kft
MSL. Low VFR/MVFR in heavier rain, IFR/LIFR in snow. LLWS threat
becoming area-wide late tonight. Surface winds: SW-SE 5-15 kt,
afternoon gusts to 20-30 kt for SE Oregon and near ID/NV
border. Gradually increasing tonight/early Wed to SW-S 15-30 kt
with to 30- 50 kt gusts, locally higher on mtn tops.

KBOI...Mainly VFR. A 60% chance of rain beginning around
Wed/02Z-03Z, increasing to 90% chance overnight. Brief MVFR
possible at precip onset prior to increasing wind speeds. Low
level wind shear threat ramping up overnight. Surface winds:
becoming SE 5-15 kt by mid morning. Increasing to SE 15-20 kt
overnight, with 25-30 kt gusts. Then W-NW 15-25 kt with 35-45 kt
gusts beginning approx Wed/15Z with cold front.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Wind Advisory from 5 AM to 5 PM MST Wednesday
     IDZ011-013>016-029-030.
     High Wind Warning from 8 AM to 5 PM MST Wednesday IDZ028.
OR...Wind Advisory from 5 AM MST /4 AM PST/ to 11 AM MST /10 AM
     PST/ Wednesday ORZ061>063.

&&

$$

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SHORT TERM...KA
LONG TERM....SH
AVIATION.....SH