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Forecast Discussion for Boise, ID

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212
FXUS65 KBOI 042001
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
201 PM MDT Tue Aug 4 2026

.KEY MESSAGES...
- Smoky conditions continue through the week.

- Warming trend brings temperatures near to above 100 degrees
  by Thursday.

- Breezy winds Friday through the weekend.

&&

.SHORT TERM /Through Thursday Night/...
As high pressure builds over the area, hotter and drier weather
continues over the forecast area. A warming trend through
Thursday brings temperatures from 5-10 degrees below normal up
to 5-10 degrees above normal by Thursday afternoon. Widespread
smoke throughout the region will help keeps temps a few degrees
cooler than most models indicate. However, air quality remains
unhealthy for many areas. Air quality alerts have been issued
for Southeast Oregon and Southwest Idaho. Some mild improvement
to smoke is expected each day as mixing occurs in the afternoon.

&&

.LONG TERM /Friday through Tuesday/...
A ridge of high pressure will
remain over Utah on Friday and Saturday. Temperatures will be 5-10
degrees above normal with lower valleys near 100 degrees Friday and
Saturday. Monsoon moisture will reach far SE Oregon and southwest ID
south of the Snake Basin on Friday afternoon. Current forecast does
not reflect this but there will be a slight chance of thunderstorms
along the NV border on Friday and Saturday afternoons. Westerly flow
will suppress the ridge on Sunday and Monday, bringing slightly
cooler temperatures with dry and breezy conditions. Smoky conditions
will continue from area wildfires which may keep temperatures
slightly cooler than forecast.

&&

.AVIATION /18Z Tuesday through Wednesday/...
Issued 1207 PM MDT TUE AUG 4 2026
Reduced visibility due to wildfire smoke, with areas of MVFR-IFR and
mountain obscuration. Surface winds: NW 5-10 kt. Winds aloft at
10kft MSL: W-NW 5-15 kt.

KBOI...low VFR, MVFR-IFR possible overnight due to wildfire
smoke. Surface winds: NW 5-10kt becoming SE 5-10kt after sunset.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Air Quality Alert until 2 PM MDT Friday for IDZ011>015-028-029-
     033.
     Air Quality Alert until 1 PM MDT Thursday for IDZ016-030.
OR...Air Quality Alert until 1 PM MDT /noon PDT/ Thursday for
     ORZ061>064.
&&

$$

www.weather.gov/Boise

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

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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