textproduct: Boise
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
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.
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