584
FXUS65 KBOI 102050
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
250 PM MDT Thu Apr 10 2025

.SHORT TERM...Tonight through Saturday night...The upper ridge
associated with today`s heat will slip eastward on Friday as a
trough edges onshore. Temperatures will trend cooler in
response to the approaching trough and increasing clouds. Highs
Friday will run 10-15 degrees cooler than today, but still above
normal. The main upper trough and accompanying surface cold
front will reach SE Oregon Friday afternoon crossing SW Idaho
Friday night. Expect a fairly intact line of showers to develop
along the front Friday afternoon over SE Oregon, becoming more
fractured as it moves through SW Idaho Friday night. Expect it
to hold together in the mountains with less than a 15% chance of
rain in the Snake Plain east of Boise. Snow accumulation will be
limited to elevations above 6-6.5kft MSL with 1-3 inches in the
w-central mtns north and east of McCall. The thunderstorm
threat is still fairly low (around 10%) and would be focused
across SE Oregon and portions of the w-central Idaho mtns Friday
afternoon. Saturday is mostly dry with a a 20-30% chance of
showers lingering across the w-central Idaho mtns. Northwest
flow behind the exiting trough will bring gusty winds and
temperatures will bottom out at or slightly below normal.

.LONG TERM...Sunday through Thursday...The back end of a trough
will continue to push out east on Sunday, steering a
northwesterly flow that will drop daytime temperatures to the
lower 60s across the valleys and snow levels to the 4000-5000 ft
range until Monday. A large ridge will build into the area on
Monday, returning warm daytime valley temperatures in the lower
70s and snow levels 6000- 8000 ft throughout early next week. An
embedded shortwave trough will move across the Central ID
mountains through Tuesday, but low moisture levels will hinder
precipitation chances except some light snow in elevations above
6000 ft on Wednesday. The area is generally expected to
continue under a ridge, continuing dry and warm conditions
Wednesday and Thursday.

&&

.AVIATION...Mainly VFR. Mostly SCT high clouds 20 kft and above.
Surface winds: S-SW 10-15 kt with gusts 20-25 kt, then W-NW up to 10
kt after Fri/00z. Winds aloft at 10kft: SW 15-30 kt.

KBOI...VFR. Potential LLWS tonight. Surface winds SE 5-10 kt, then N-
NW 5-10 kt tomorrow. Gusts 15-20 kt until Fri/00z.

Weekend Outlook...Mostly VFR. There is a 20-50 percent chance of
showers along a cold front Fri aft through Sat. Areas of MVFR and
local IFR conditions and mountain obscuration in Central ID
mountains on Sat. Dry on Sunday. W-NW surface winds 5-15 kt, except
15-25 kt with gusts 30-35 kt on Saturday.

&&

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

&&

$$

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