052
FXUS65 KBOI 200953
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
353 AM MDT Fri Sep 20 2024

.SHORT TERM...Today through Sunday night...Northwest flow
becomes more prominent today into Saturday as an upper wave
tracks along the US/Canada border. Surface winds will respond
in kind, ticking up this afternoon and again Saturday with gusts
to 20 mph along the I-84 corridor from late morning through
evening. While high temperatures will hold steady through the
weekend, drier air will allow for cooler overnight lows,
especially Saturday morning. A more amplified upper trough will
move through the region Sunday night increasing cloud cover.
It`s still looking like a dry passage, with any minimal chance
of showers (10-15%) staying in the mountains north and east of
McCall.

.LONG TERM...Monday through Friday...Northwest flow follows the
upper trough passage on Monday. This will refresh the gusty
northwest surface winds across open terrain. Tuesday warms into
Wednesday which still looks to be the warmest day next week. At
lower elevations the probability for highs 80F or warmer is
around 90% on Wednesday. Confidence wanes for Thur/Fri as the
00Z operational models continue to show poor run-to-run
consistency on how to evolve the upper ridge responsible for the
warming. The forecast follows the ensemble mean which has
trended warmer for Thursday before cooling on Friday as the
ridge flattens. There is good agreement that it remains dry
through next week.

&&

.AVIATION...VFR with high clouds. Surface winds: becoming NW
5-15 kt with local gusts to 20 kt 20/20Z to 21/03Z today. Winds
at 10kft: northwest 10-15 kt.

KBOI...VFR. East winds shift to the northwest this morning and
will remain NW through Saturday.

Weekend Outlook...VFR with scattered high clouds. Afternoon
surface winds W-NW 5 to 15 kt. Winds aloft NW 15 to 20 kt.

&&

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

&&

$$

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SHORT TERM...DG
LONG TERM....DG
AVIATION.....DG