FXUS65 KBOI 142032
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
232 PM MDT Tue Apr 14 2026

.KEY MESSAGES...

- Rain, mountain snow and gusty winds on Wednesday, then snow
  level lowering to valley floors Thursday morning.

- Subfreezing morning temperatures Thursday through Saturday
  across the entire area.

- Warmer temperatures over the weekend with another chance of
  precipitation early next week.

&&

.SHORT TERM /Through Thursday Night/...
An upper trough dropping south along the BC coast will push
into the region later tonight bringing valley rain and mountain
snow. Precipitation will develop across SE Oregon by late this
evening, spreading into SW Idaho overnight. Snow levels of
5000-6500 feet will support snow or a rain/snow mix across
mountain valley floors with any minor accumulation melting off
by late morning. Precipitation mixes with or changes to rain
below 6000 feet with a heavy, wet snow continuing in the higher
mountains through Wednesday evening. Liquid equivalent totals
over the mountains is 0.75-1.5" over the 24h period from late
this evening through Wednesday evening. Above 6500 feet this
will translate to 10-20" of snow, with high end amounts of up
to 2 feet.

Lower elevations will see periods of rain on Wednesday. By late
morning strong southwest flow aloft (30-50 mph at ~10kft) will
mix to the surface bringing gusty winds to higher terrain
outside of the Snake Plain. The windiest locations will be
southern Harney, Malhuer, and Owyhee counties where gusts of
40-45 mph are expected. A cold front will push into the region
Wednesday evening bringing a chance of thunderstorms, more gusty
winds and lower snow levels. Areas that don't tap into the
stronger winds during the day, will see a period of stronger
gusts with the frontal passage. This is mostly in the Snake
Plain and Weiser Basin. Snow levels will drop to valley floors
behind the front as precipitation scatters out. Though it will
remain breezy, lower elevations will briefly flirt with freezing
temperatures Thursday morning.

The upper low passes overhead on Thursday, keeping a chance of
rain/snow/graupel showers at lower elevations with snow showers
in the mountains. Daytime instability will support heavier
showers and possible thunderstorms in the mountains which could
drop brief heavy snow.

Thursday night will see drying conditions and clearing skies as
the low exits eastward. This will allow for a widespread freeze,
and for many locations a hard freeze (28 degrees or less).

&&

.LONG TERM /Friday through Tuesday/...
Strong northwest flow from the back end of the eastward moving
trough will continue breezy conditions Friday, with elevated
gusts up to 30 mph mainly over Magic Valley and Camas Prairie.
The west-central ID mountains will see a 20-30% chance of snow
showers from remnant upper moisture on Friday. Nighttime
temperatures will be expected to stay on the colder end, below
freezing through Saturday morning. Otherwise, a warming and
drying trend will settle in for the weekend as a ridge builds in
from the northwest coast. Peak temperatures will hover slightly
above normal on Saturday and 5-10 degrees above normal on
Sunday.

Long-range guidance continues to favor another low digging down from
the Gulf of Alaska early next week, although considerable
uncertainty remains over its arrival timing for our area. However,
ensembles still favor the late Sunday/Monday time frame. With
that, precipitation chances will increase from west to east
early Sunday into Monday, reaching 30-60% area-wide by Monday
afternoon. Precipitation chances will remain elevated through
midweek. The south-southwest flow from this system will keep
temperatures near normal when it impacts our area. Gusty winds
can be expected ahead of and behind the system passage.

&&

.AVIATION /18Z Tuesday through Wednesday/...
Issued 1152 AM MDT TUE APR 14 2026
VFR today. Band of SCT-BKN high clouds moving in from west. Cold
front will bring showers from W-E early Wednesday morning, with MVFR-
IFR conditions and mtn obscuration in showers/low ceilings. Snow
Levels will be 5-6.5 kft MSL today through Wednesday morning.
Surface winds: SW-NW 5-15 kt this afternoon with gusts up to 25 kt
near KTWF/KJER. Winds aloft at 10kft MSL: W-NW 10-20 kt

KBOI...VFR. Rain showers returning early Wednesday morning with
increasing clouds and lowering ceilings. Surface winds: W-NW 5-10 kt
this afternoon, then SE 5-10kt this evening.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.

OR...None.

&&

$$

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SHORT TERM...DG
LONG TERM....JY
AVIATION.....JY