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000
FXUS65 KBOI 191540
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
940 AM MDT Fri Apr 19 2024

.DISCUSSION...A ridge of high pressure will continue to build
over the region today, with warm daytime temperatures
anticipated. Overnight lows will once again dip below freezing
across the area tonight, due to clear skies across the region.
Breezy southeasterly winds will kick up this afternoon,
especially in the Snake River Valley. The forecast has been
updated to increase ridgetop and valley winds this morning,
otherwise, the forecast is on track.

&&

.AVIATION...VFR. Increasing high clouds this afternoon with
mid-level cumulus developing over the higher terrain. 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, mostly clear skies. Winds SE 5-10 kt, becoming variable
less than 10 kt around 21Z this afternoon.

Weekend Outlook...VFR and high clouds Saturday. Clouds lowering but
conditions mainly remaining VFR Saturday evening into Sunday, with
isolated MVFR showers and mountain obscuration in Baker County and
West Central Mountains. Decreasing clouds Sunday evening. Snow
levels generally 5500-7500 ft MSL during showers. Surface winds:
SW-SE 5-15 kt Saturday, and W-NW 10-25 kt Sunday.

&&

.PREV DISCUSSION...
SHORT TERM...Today through Sunday night...Warming through
Saturday as a Pacific upper ridge comes inland and over our
CWA. Mostly clear today and tonight then increasing high clouds
Saturday. Low temperatures tonight 33 to 39 degrees in the
southern Idaho agricultural valleys. Pacific cold front will
bring a 20-40 percent chance of rain showers to northern-most
zones Saturday night and clouds to remaining zones. Sunday will
be clearing, windy, and cooler as an upper trough passes north
of our CWA. Clear and colder Sunday night with decreasing west
winds. Lows in the 20s and 30s, with southern Idaho agricultural
valleys between 32 and 38 degrees. Sunny, breezy, and cool
Monday, then clear and not as cold Monday night.

LONG TERM...Monday through Friday...An upper level trough will
move by to our north on Monday as an upper level ridge moves into
the Pacific Northwest. This will keep temperatures near normal
with dry conditions. The ridge will move overhead on Tuesday
with temperatures warming around 10 degrees from Monday. The
pattern will become more active Wednesday through Friday as an
upper level trough approaches our area, although models differ
in timing and strength. Ensembles favor keeping our area in the
warm sector on Wednesday, with temperatures trending cooler
Thursday and Friday as the trough moves inland. Precipitation
chances will increase Wednesday through Friday to 20-50%, with
the highest chances in the mountains. Even with the cooler air
associated with the trough, snow levels are expected to remain
above 5500-6000 ft MSL. Breezy conditions will also accompany
the trough towards the end of the week.

&&

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

&&

$$

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DISCUSSION...SA
AVIATION.....SA
SHORT TERM...LC
LONG TERM....ST