359
FXUS65 KBOI 210933
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
333 AM MDT Thu Aug 21 2025

.SHORT TERM...Today through Saturday night...The heat will
continue to build into Saturday as a strong area of high
pressure to the south expands northward. Some locations could
peak near 100F in the lower valleys (including Mountain Home to
Ontario) Saturday afternoon. Dry conditions prevail, except for
a slight chance (less than 20 percent) of showers or
thunderstorms near the ID/NV border Saturday afternoon and
evening.

.LONG TERM...Sunday through Thursday...A surge of monsoon
moisture advects into the area early next week, leading to a
chance of showers and afternoon-evening thunderstorms starting
on Sunday and continuing through midweek. The higher chances
favor areas along the Nevada border and in central Idaho per
latest model trends, with lower chances in the valleys.
Temperatures lower through the period, from several degrees
above normal on Sunday to near normal by Wednesday.

&&

.AVIATION...VFR. Local visibility reductions in central ID due
to wildfire smoke. Surface winds: W-NW 5-15 kt. Gusts to 20 kt
after 17Z. Winds aloft at 10kft MSL: SW to W 10-20 kt.

KBOI...VFR. Surface winds: variable less than 6 kt becoming NW
8-12 kt with gusts to 20 kt after 17Z.

Weekend Outlook...VFR. Local visibility reductions in central
ID due to wildfire smoke. A 15-30 percent chance of showers and
thunderstorms near the Nevada border Sunday aft-eve. Light and
variable surface winds less than 10 kt, except gusty/erratic
winds near storms.

&&

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

&&

$$

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SHORT TERM...BW
LONG TERM....BW
AVIATION.....BW