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000
FXUS65 KBOI 200328
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
928 PM MDT Fri Apr 19 2024

.DISCUSSION...An area of mid-level clouds along the northern NV
border is marking the passage of a weak upper trough through
the northern Great Basin. Otherwise clear skies overnight with
an increasing easterly wind across open terrain. Saturday will
be warmer with periods of high clouds. Forecast for this evening
is on track.

&&

.AVIATION...VFR. Mid-high clouds along the northern NV border
overnight. Surface winds: E-SE 5-15 kt, with gusts to 25 kt in
the Magic Valley. Winds aloft at 10kft MSL: SW-NW 5-15 kt.

KBOI...VFR. Surface winds less than 12 kt through Saturday
night.

Weekend Outlook...VFR and high clouds Saturday. Clouds lowering
but conditions mainly remaining VFR Saturday evening into
Sunday. Isolated MVFR and mountain obscuration in showers in
the West Central Mountains Saturday night into early Sunday.
Snow levels generally 5500-7500 ft MSL during showers. Surface
winds: SW-SE 5-15 kt Saturday with local gusts to 25 kt, then
W-NW 10-25 kt with local gusts to 35 kt Sunday. Strongest gusts
in the Snake Plain east of KMUO.

&&


.PREV DISCUSSION...
SHORT TERM...Tonight through Sunday night...A ridge of high
pressure will build into the region through the day, bringing
clear conditions, warm daytime highs, and low overnight
temperatures. Then, a weak shortwave trough will move to our
north, bringing a very slight chance of precipitation (10%
chance) to the West Central Mountains on Sunday. Temperatures
will be slightly cooler on Sunday, as upper level zonal flow
takes over. There will be some weak cumulus development over
terrain each afternoon, but otherwise, clear conditions will
prevail over most of the region.

LONG TERM...Monday through Friday...Upper level zonal flow will
bring cool temperatures on Monday as a deeper ridge builds into
the western area of the CWA by Tuesday. Above normal
temperatures and dry conditions will continue through Tuesday
afternoon. Then, an upper level low will dig down the coast of
British Columbia, shifting southwest moist flow into the
region. This will bring the first chance of thunderstorms and
showers into the Magic Valley and near the ID-NV border. As the
low gets closer to the region on Wednesday, another push of
moisture with cooler air will bring another threat for
widespread afternoon showers and thunderstorms. A slight chance
of showers and thunderstorms will continue on Wednesday
afternoon and evening. This low looks to finally move through
the region on Thursday, although there is some model
disagreement on the progression of the low. Therefore,
precipitation and cooler temperatures will continue through
Friday.

&&

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

&&

$$

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DISCUSSION...DG
AVIATION.....DG
SHORT TERM...SA
LONG TERM....SA