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Forecast Discussion for Boise, ID

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536
FXUS65 KBOI 041707
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
1107 AM MDT Thu Jun 4 2026

.UPDATE...Updated aviation discussion.

&&

.KEY MESSAGES...
- Breezy winds through the end of the week into the weekend,
  with the strongest winds on Saturday.

- Near to below normal temperatures through the middle of next
  week, except Friday with highs around 10 degrees above normal.

- A wetter pattern is likely next week with significant
  precipitation totals possible.

&&

.SHORT TERM /Through Saturday Night/...
Issued 312 AM MDT THU JUN 4 2026
Behind the cold front that moved through yesterday, highs today
will be near to slightly above normal with breezy winds. Gusts
will be highest east of Boise through the Magic Valley with
speeds 20-30 mph and lighter winds elsewhere. Skies will be
mostly clear as high pressure starts to build overhead.
Temperatures Friday will rise 5-10 degrees from today as the
ridge moves east and southwest flow aloft develops ahead of an
upper trough moving into the Pacific Northwest. Breezy winds
will develop Friday afternoon, strongest over the higher terrain
with gusts 25-35 mph. A cold front Friday night and Saturday
will cool temperatures by 10-15 degrees with gusty winds
expanding into the Snake River Valley. Despite the advancing
trough and cold front, precipitation chances will remain less
than 10% with increasing high clouds.

&&

.LONG TERM /Sunday through Thursday/...
Issued 312 AM MDT THU JUN 4 2026
An upper level trough will move across the Idaho Panhandle and
into western Montana during the day Sunday. This will keep most
precipitation north of the area, but the northern mountains will
see a 10-20% chance of showers and thunderstorms. Winds will be
breezy, especially across south-central Idaho, and highs will be
5-10 degrees below normal.

Confidence has increased in a wetter and cool pattern next week
as a deep upper low moves into the Pacific Northwest.
Precipitation chances rise through the day Monday as the low
moves onshore, then peak Tuesday and Wednesday at around 30-70%
before gradually tapering off Thursday as the low slowly
traverses the Pacific Northwest. However, the chance of
precipitation combined across Monday through Wednesday is much
higher at around 60-90%, with the highest chance in the
mountains. A 10-20% chance of thunderstorms will develop, with
the highest potential on Monday and Tuesday in the warmer air
ahead of the trough. Precipitation totals in the ensembles vary
Monday through Wednesday but average around 0.10-0.25" in the
lower elevations and 0.25-0.75" in the mountains. Heavier
amounts are possible with around a 25% chance of over 1" in the
mountains, and thunderstorms could also produce heavy rainfall.
Finally, as colder air arrives with the low, high peaks may see
light snow, potentially as low as 6000 feet MSL if the center of
the low moves directly overhead as depicted by some models.
Winds will be breezy through the week with temperatures
averaging 5-10 degrees below normal.

&&

.AVIATION /18Z Thursday through Friday/...
Issued 1100 AM MDT THU JUN 4 2026
VFR, a few high clouds this evening. Surface winds: W-NW 5-15
kt, with gusts 15-30 kt, increasing east of KBOI. Winds
light and variable this evening. Winds aloft at 10kft: W 10-20
kt.

KBOI...VFR. Surface winds: NW 8-13 kt, gusts 20 kt in the
afternoon. Light SE winds tonight.

Weekend Outlook...Mainly VFR. Mostly clear on Friday with
increasing high clouds on Saturday. A 10-20% chance of showers
and thunderstorms across the northern mountains Sunday. Surface
winds: SW-NW 5-15 kt with gusts 15-30 kt Friday, becoming W-NW
10-20 kt with gusts 20-35 kt Saturday and Sunday.

&&

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

OR...None.

&&

$$

www.weather.gov/Boise

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AVIATION.....JM
SHORT TERM...ST
LONG TERM....ST

Previous Forecast Discussions may be found at
NWS Boise, ID (BOI) Office Forecast Discussions.
(Click 'Previous Version' there to view past versions successively.
Some may differ only in time posted.)

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