097
FXUS65 KBOI 180943
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
343 AM MDT Fri Oct 18 2024

.SHORT TERM...Today through Sunday night...An upper ridge nosing
in from the west will bring dry conditions today that will last
through the weekend. Temperatures in the mid-upper 30s in the
Snake Plain are expected to lower a few more degrees, bottoming
out around the freezing mark in the Upper Treasure Valley and
Western Magic Valley where Freeze Warnings are in effect. There
is also a Frost Advisory in the Lower Treasure Valley this
morning where pockets of frost are possible in wind-sheltered
areas. Light winds tonight will bring a better chance of even
colder temperatures. A Freeze Watch is in effect for the Lower
Treasure Valley late tonight through early Saturday morning
where temperatures may dip below freezing. Temperatures trend
warmer each day - from below normal today, to near normal on
Saturday, and lastly several degrees above normal on Sunday.

.LONG TERM...Monday through Friday...Models remain consistent
which increases confidence that moisture along a cold front
will skim our northern areas on Monday for a 30-60 percent
chance of showers north of Boise. Precip amounts have also been
consistently showing total amounts of less than a quarter inch,
with the highest amounts in the far northern mountains (northern
Baker County to the West Central ID Mountains). Snow levels
remain high, limiting light snow accumulations to peaks above
7500-8000 feet. Thereafter, an upper ridge develops in response
to a strengthening offshore low pressure system bringing dry
conditions and above-normal temperatures lasting through
Thursday. Showers may start to move into the region on Friday as
the offshore low enters the Pacific Northwest, although there
is a lot of spread in the ensemble members so confidence is low.

&&

.AVIATION...VFR. Scattered-broken mid-level clouds in the
mountains, decreasing by mid-morning. Surface winds: W-NW 5-15
kt with gusts to 25 kt. Winds aloft at 10kft MSL: N 10-20 kt.

KBOI...VFR. Surface winds: NW 5-15 kt.

Weekend Outlook...VFR with scattered/broken mid and high clouds.
Surface winds: variable 10 kt or less.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Frost Advisory until 9 AM MDT this morning IDZ012.
     Freeze Watch from late tonight through Saturday morning IDZ012.
     Freeze Warning until 9 AM MDT this morning IDZ014-016.
OR...Frost Advisory until 9 AM MDT this morning ORZ064.
     Freeze Watch from late tonight through Saturday morning ORZ064.

&&

$$

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SHORT TERM...BW
LONG TERM....BW
AVIATION.....BW