732
FXUS65 KBOI 061736
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1136 AM MDT THU AUG 6 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- VERY HOT TEMPERATURES TODAY THROUGH SATURDAY.
- SMOKY CONDITIONS CONTINUE THROUGH THE WEEKEND.
- BREEZY WINDS FRIDAY THROUGH THE WEEKEND WITH VERY LOW
THUNDERSTORM CHANCES RETURNING ALONG THE ID/NV BORDER.
SHORT TERM /THROUGH SATURDAY NIGHT/
ISSUED 348 AM MDT THU AUG 6 2026
TEMPERATURES WILL STAY HOT AS THE UPPER-LEVEL RIDGE REMAINS
OVER THE GREAT BASIN / FOUR CORNERS REGION. THE PEAK INTENSITY
OF THE RIDGE OVER THE REGION WILL BE FRIDAY, WITH MAXIMUM
TEMPERATURES IN LOWER ELEVATIONS ABOVE 100 DEGREES. ACCORDINGLY,
A HEAT ADVISORY IS IN EFFECT STARTING THIS AFTERNOON THROUGH
SATURDAY EVENING. SOME LOCAL AREAS WITH MORNING LOWS AROUND 70
DEGREES WILL BE UNDER MAJOR HEAT RISK FRIDAY AND SATURDAY, WHILE
THE REST OF THE AREA WITH MORNING LOWS IN THE 60S AND 50S SEE
MODERATE TO MINOR HEAT RISK. THE RIDGE WILL BEGIN TO FLATTEN
FRIDAY NIGHT, WITH STRONGER WESTERLY FLOW ALOFT MOVING OVERHEAD.
THIS WILL MODERATE THE TEMPERATURES SATURDAY COMPARED TO FRIDAY
ALONGSIDE INCREASING AFTERNOON WIND GUSTS, ESPECIALLY IN
SOUTHWEST IDAHO. BEGINNING FRIDAY THROUGH THE WEEKEND, WIND
GUSTS 20 TO 30 MPH ARE POSSIBLE IN OPEN AREAS AND RIDGES.
ELSEWHERE, GUSTS UP TO 20 MPH ARE POSSIBLE. ADDITIONALLY, WHILE
A VERY LOW (<5%) CHANCE, ISOLATED THUNDERSTORMS ARE POSSIBLE
ALONG THE ID/NV BORDER FRIDAY AND SATURDAY AFTERNOONS. THIS IS A
RESULT OF SOME MONSOONAL MOISTURE REACHING THE NORTHERN ROCKIES
AS THE FOUR CORNERS RIDGE VERY SLIGHTLY WEAKENS AND MOVES A BIT
EAST. SMOKE IMPACTS ARE EXPECTED TO CONTINUE.
LONG TERM /SUNDAY THROUGH THURSDAY/
ISSUED 348 AM MDT THU AUG 6 2026
THE FOUR CORNERS RIDGE WILL REMAIN WITH CONTINUED FLATTENING
OVER THE REGION FROM UPPER-LEVEL TROUGHING REMAINING OFFSHORE.
TEMPERATURES WILL BE NEAR NORMAL TO 5 DEGREES ABOVE NORMAL
THROUGH THE PERIOD. MONSOON MOISTURE WILL CONTINUE TO REACH FAR
SE OREGON AND SOUTHWEST ID SOUTH OF THE SNAKE BASIN THROUGH
EARLY NEXT WEEK. THERE IS INCREASING CONFIDENCE IN A SLIGHT
CHANCE OF THUNDERSTORMS ALONG THE NV BORDER EACH AFTERNOON.
WESTERLY FLOW ALOFT WILL CONTINUE BREEZY CONDITIONS, ESPECIALLY
DURING THE AFTERNOONS AND EARLY EVENINGS. SMOKY CONDITIONS WILL
CONTINUE FROM AREA WILDFIRES WHICH MAY KEEP TEMPERATURES
SLIGHTLY COOLER THAN FORECAST. BY THURSDAY, A SIGNIFICANT
PATTERN CHANGE IS BEING CONVERGED UPON BY LONG RANGE MODELS. THE
UPPER-LEVEL TROUGHING THAT HAS BEEN SITTING OFFSHORE UNTIL NOW
MOVES INLAND, BRINGING COOLER TEMPERATURES AND BETTER CHANCES OF
PRECIPITATION THAN THE AREA HAS SEEN IN SOME TIME. AS WITH MOST
THINGS THIS FAR IN THE LONG TERM, THESE DETAILS ARE FICKLE AND
SUBJECT TO QUICK CHANGES FORECAST TO FORECAST.
AVIATION /18Z THURSDAY THROUGH FRIDAY/
ISSUED 1127 AM MDT THU AUG 6 2026
AREAS OF MVFR VISIBILITY AND MOUNTAIN OBSCURATION DUE TO
WILDFIRE SMOKE, OTHERWISE VFR. HIGH DENSITY ALTITUDE EACH
AFTERNOON DUE TO HOT TEMPERATURES. SURFACE WINDS:
W-NW 5-12KT WITH GUSTS TO 18KT UNTIL 07/01Z THEN VARIABLE LESS
THAN 8 KT. WINDS ALOFT AT 10KFT MSL: W-SW 5-10KT.
KBOI...WILDFIRE SMOKE BUT GENERALLY REMAINING VFR. MOUNTAINS
OBSCURED AT TIMES. HIGH DENSITY ALTITUDE EACH AFTERNOON DUE TO
HOT TEMPERATURES. SURFACE WINDS: WNW AROUND 10 KT TIL 07/01Z
THEN SE AROUND 5 KT.
WEEKEND OUTLOOK...AREAS OF MVFR VISIBILITY AND LOCAL MOUNTAIN
OBSCURATION DUE TO WILDFIRE SMOKE, OTHERWISE VFR. HIGH DENSITY
ALTITUDE EACH AFTERNOON DUE TO HOT TEMPERATURES. LESS THAN 10%
CHANCE OF AFTERNOON THUNDERSTORMS ALONG ID/NV BORDER FRIDAY
THROUGH SUNDAY. SURFACE WINDS: W-NW 7-12 KT WITH GUSTS 15 TO 20
KT DURING THE AFTERNOONS/EARLY EVENINGS, OTHERWISE VARIABLE LESS
THAN 10 KT.
BOI WATCHES/WARNINGS/ADVISORIES
ID...AIR QUALITY ALERT UNTIL 2 PM MDT FRIDAY FOR IDZ011>015-028-029-
033.
HEAT ADVISORY UNTIL 9 PM MDT SATURDAY FOR IDZ012-014>016-029-
030-033.
AIR QUALITY ALERT UNTIL 1 PM MDT THIS AFTERNOON FOR IDZ016-030.
OR...HEAT ADVISORY UNTIL 9 PM MDT /8 PM PDT/ SATURDAY FOR
ORZ061>064.
AIR QUALITY ALERT UNTIL 1 PM MDT /NOON PDT/ THIS AFTERNOON FOR
ORZ061>064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....CH
SHORT TERM...CH
LONG TERM....CH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page