143
FXUS65 KBOI 040939
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
339 AM MDT TUE AUG 4 2026
KEY MESSAGES
- SMOKY CONDITIONS CONTINUE THROUGH THE WEEK.
- WARMING THIS WEEK BRINGS TEMPERATURES ABOVE 100 DEGREES BY
THURSDAY.
- INCREASED WINDS FRIDAY THROUGH THE WEEKEND.
SHORT TERM /THROUGH THURSDAY NIGHT/
UPPER-LEVEL RIDGING WILL CONTINUE TO BUILD INTO THE PACIFIC
NORTHWEST. INCREASING MAXIMUM TEMPERATURES DAY OVER DAY ARE
EXPECTED, WITH MOST AREAS SEEING AN INCREASE OF 5 DEGREES PER
DAY. TEMPERATURES CLIMB FROM 5 DEGREES BELOW NORMAL TO 5-10
DEGREES ABOVE NORMAL BY THE END OF THE SHORT TERM. SOME
MODERATION IN TEMPERATURES FROM LOCALIZED SMOKE DENSITY IS
POSSIBLE, ALTHOUGH DIFFICULT TO DEPICT QUANTITATIVELY. SPEAKING
OF SMOKE, CONTINUED IMPACTS ACROSS THE AREA ARE EXPECTED AS
NORTH/NORTHWESTERLY WINDS ALOFT TRANSPORT SMOKE FROM PARTS OF OREGON
AND WASHINGTON. WHILE BREEZY WINDS AND DIURNAL HEATING WILL
PROVIDE SOME RELIEF IN THE AFTERNOONS, MODELS AGREE THAT THE
SMOKE WILL BE STICKING AROUND FOR NOW.
LONG TERM /FRIDAY THROUGH TUESDAY/
WHILE THE UPPER-LEVEL RIDGE IS EXPECTED TO REMAIN OVER THE
DESERT SOUTHWEST, FLATTENING OF THE RIDGE OVER THE PACIFIC
NORTHWEST IS FORECAST GOING INTO THE WEEKEND. HOT TEMPERATURES
WILL BE STICKING AROUND, WITH THE LARGER CONCERN BEING FIRE
WEATHER. AFTERNOON WIND GUSTS WILL INCREASE, AND DESPITE THE
SWITCH TO WEST/SOUTHWESTERLY FLOW ALOFT, NO PRECIPITATION IS
EXPECTED. THE SYNOPTIC PATTERN LOOKS SIMILAR AT THE BEGINNING OF
NEXT WEEK AS WELL, HOWEVER CLUSTERS HAVE THE UPPER-LEVEL RIDGE
RETREATING EAST TOWARDS THE FOUR CORNERS REGION, ALLOWING SOME
MOISTURE TO MAKE IT INTO THE GREAT BASIN. TIME WILL TELL IF WE
ARE FORTUNATE ENOUGH FOR IT TO MAKE IT THIS FAR NORTH. OTHERWISE,
SMOKY CONDITIONS WILL CONTINUE FROM AREA WILDFIRES.
AVIATION /06Z TUESDAY THROUGH WEDNESDAY/
ISSUED 1150 PM MDT MON AUG 3 2026
REDUCED VISIBILITY DUE TO WILDFIRE SMOKE, WITH AREAS OF MVFR-IFR AND
MOUNTAIN OBSCURATION. SURFACE WINDS: VARIABLE UP TO 12 KT, EXCEPT NW
10-15 KT WITH GUSTS TO 20-25 KT BETWEEN KBKE-KONO THROUGH EARLY AM.
WINDS ALOFT AT 10KFT MSL: NW-W 5-20 KT.
KBOI...MVFR-IFR VISIBILITY WILL BE COMMON DUE TO WILDFIRE SMOKE.
TEMPORARY SLIGHT IMPROVEMENT DURING LATE AFTERNOON TUESDAY. SURFACE
WINDS: VARIABLE OR SOUTHERLY 3-6 KT OVERNIGHT, RETURNING TO NW 5-12
KT TUE AFTERNOON.
BOI WATCHES/WARNINGS/ADVISORIES
ID...AIR QUALITY ALERT UNTIL 2 PM MDT FRIDAY FOR IDZ011>015-028-029-
033.
OR...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
SHORT TERM...CH
LONG TERM....CH
AVIATION.....CH
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