089
FXUS65 KBOI 042345
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
545 PM MDT TUE AUG 4 2026
UPDATE
UPDATED AVIATION DISCUSSION.
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/
ISSUED 201 PM MDT TUE AUG 4 2026
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/
ISSUED 201 PM MDT TUE AUG 4 2026
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 /00Z WEDNESDAY THROUGH THURSDAY/
ISSUED 535 PM MDT TUE AUG 4 2026
SMOKE FROM AREA WILDFIRES WILL CONTINUE TO BRING MVFR
CONDITIONS TO THE REGION. BRIEF IFR CONDITIONS ARE LIKELY
OVERNIGHT NEAR KONO-KBNO WITH NEARBY ACTIVE FIRES. BRIEF
IMPROVEMENTS TO VFR WILL OCCUR BY LATE MORNING. MOUNTAIN
OBSCURATION IN SMOKE. SURFACE WINDS: VARIABLE LESS THAN 10 KT
OVERNIGHT SHIFTING TO NW-W 5-10 KT BY LATE MORNING. WINDS ALOFT
AT 10KFT MSL: W-NW 10-20 KT.
KBOI...WILDFIRE SMOKE WILL BRING MVFR CONDITIONS OVERNIGHT WITH
FOOTHILLS OBSCURED. IMPROVEMENT TO VFR WILL OCCUR BY THE LATE
MORNING, BUT SMOKE WILL CONTINUE TO LINGER THROUGH THE NEXT
COUPLE OF DAYS. SURFACE WINDS: VARIABLE LESS THAN 6 KT
OVERNIGHT, SHIFTING TO NW-N 5-10 KT BY THE LATE MORNING.
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
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....SA
SHORT TERM...JM
LONG TERM....KA
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