703
FXUS65 KBOI 080936
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
336 AM MDT Wed Oct 8 2025

.SHORT TERM...Today through Friday night...An upper level
trough near Haida Gwaii will gradually move south along the
coast through Thursday, shifting the flow aloft to the southwest
and bringing warmer temperatures to the region. Southwest-
southeast winds and will gradually increase through Friday ahead
of the cold front. Temperatures Wednesday warm around 5 degrees
and a few more degrees by Thursday. As the system moves south
along the coast, high clouds increase across central OR.
Thursday is likely the warmest day of the period for eastern OR
while Friday is forecast to be the warmest day of the period for
southwest Idaho. The trough becomes a closed low and remains
off the OR coast, with a dry slot developing over southeast OR
and southwest ID for much of the day Friday before a cold front
arrives Friday evening. Showers chances increase to 20-40
percent late in the evening. With pronounced southwest
flow continuing, favored areas for upslope flow will receive
the brunt of the moisture, such as the west-central Idaho and
Boise Mountains (60-80% chance).

.LONG TERM...Saturday through Wednesday...The trough moves
inland by Saturday, with showers increasing to 40 percent in
the valleys and continued 60-80 percent in the mountains. Winds
become west-northwest on Saturday afternoon with gusts to 20 to
30 mph during the afternoon behind the front. Forecast
confidence beyond Sunday is low, but favors much cooler and
unsettled early next week with a trough somewhere over the
Pacific Northwest. Forecast models continue to struggle with
current and recent tropical systems disrupting and enhancing the
jet stream, particularly in the eastern Pacific near Cabo San
Lucas and in the western Pacific Ocean. Temperatures cool 10-20
degrees on Saturday and another 5-10 degrees on Sunday.

&&

.AVIATION...VFR. Clear. Surface winds E-SE 5-15kt, LLWS this
morning around KONO KEUL KMYL through 15z/Wed. LLWS redeveloping
Thu morning KBKE KONO KBOI KTWF KJER. Winds aloft at 10kft MSL:
SW 20-30kt becoming S-SW by Thu.

KBOI...VFR. Clear. SE 5-15kt. LLWS possible Thu morning.

&&

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

&&

$$

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SHORT TERM...KA
LONG TERM....KA
AVIATION.....KA