FXUS65 KBOI 230902
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
302 AM MDT Wed Oct 23 2024

.SHORT TERM...Today through Friday night...A shortwave trough
will move through this afternoon, bringing a cold front with
gusty winds, mountain snow, and widespread rain to the region.
Snow levels will drop from 7000-8000 feet to 5000-6000 feet by
Thursday morning, however snow accumulations will be minimal and
melt later Thursday morning. Snow totals will be less than 1-2
inches above 6000 feet while rainfall totals will range from
0.10-0.25 inches of rain by Thursday morning. Boise has about
an 80% chance of greater than a tenth of an inch of rain by
10pm MDT.

Winds will increase with the frontal passage in the late
evening, with sustained speeds anywhere from 20-30 mph with
brief gusts around 8-10 pm MDT up to 40-45 mph, mainly in the
Magic Valley. Morning lows will be right around or below
freezing by Thursday morning, with most valley locations seeing
a frost. Temperatures will be around 5-10 degrees below normal
tomorrow after the frontal passage, but then will increase on
Friday as the upper level ridge of high pressure builds into the
region.

.LONG TERM...Saturday through Wednesday...A ridge of high
pressure will continue to build over the West Coast this
weekend, bringing temperatures nearly 5-10 degrees above normal
with highs near 70 on Saturday in Boise. Unsettled conditions
will then return late Sunday, with a long wave trough move
through the area on Monday and Tuesday. This will bring much
colder temperatures with widespread precipitation. Lower snow
levels will bring snow accumulations to the mountains. A weak
ridge will briefly build in late Tuesday-Wednesday morning, with
good model agreement on another system moving into the region
late Wednesday. Model agreement with cluster solutions and
deterministic models remains high on the general pattern, with
some differences in timing and amplitude of successive troughs.


&&

.AVIATION...VFR. High clouds tonight. Cold frontal passage will
bring areas of MVFR/IFR conditions along with rain and mountain
snow Wednesday afternoon and evening. Mountains obscured in low
clouds and precipitation. Surface winds: variable less than 10
kt becoming NW 10-20 kt with gusts to 30-35 kt after 24/22Z.
Winds aloft at 10kft MSL: generally W-SW 25-35 kt.

KBOI...VFR with high clouds. Cold frontal passage expected
Wednesday evening between 24/00Z-24/03Z will bring MVFR
conditions in rain, along with wind gusts up to 30 kts. Variable
winds 5 kt or less overnight, becoming W-NW 8-12 kt after
24/22Z.

&&

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

&&

$$

www.weather.gov/Boise

Interact with us via social media:
www.facebook.com/NWSBoise
www.twitter.com/NWSBoise

SHORT TERM...SA
LONG TERM....SA
AVIATION.....SA