197
FXUS65 KBOI 060556
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1156 PM MDT WED AUG 5 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- VERY HOT TEMPERATURES THURSDAY THROUGH SATURDAY.
- SMOKY CONDITIONS CONTINUE THROUGH THE WEEK.
- BREEZY WINDS FRIDAY THROUGH THE WEEKEND WITH VERY LOW
THUNDERSTORM CHANCES RETURNING ALONG THE ID/NV BORDER.
SHORT TERM /THROUGH FRIDAY NIGHT/
ISSUED 222 PM MDT WED AUG 5 2026
THE WARMING REACHES ITS ZENITH TOMORROW THROUGH SATURDAY, WITH
MAXIMUM TEMPERATURES IN LOWER ELEVATIONS ABOVE 100 DEGREES. EVEN
THOUGH OVERNIGHT LOW TEMPERATURES ARE IN THE 60S THROUGHOUT THE
AREA PROVIDING SOME RELIEF, A HEAT ADVISORY HAS BEEN ISSUED DUE
TO THE VERY HOT DAYTIME TEMPERATURES. 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. AS THE
DRIVING UPPER LEVEL RIDGE FLATTENS FRIDAY, AFTERNOON WIND GUSTS
PICK UP ESPECIALLY IN 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.
LONG TERM /SATURDAY THROUGH WEDNESDAY/
ISSUED 222 PM MDT WED AUG 5 2026
A RIDGE OF HIGH PRESSURE WILL REMAIN OVER UTAH THROUGH THE
EXTENDED PERIOD. TEMPERATURES WILL BE 5-10 DEGREES ABOVE NORMAL
WITH LOWER VALLEYS IN THE LOW 100S SATURDAY. MONSOON MOISTURE
WILL REACH FAR SE OREGON AND SOUTHWEST ID SOUTH OF THE SNAKE
BASIN ON SATURDAY AFTERNOON AND CONTINUE THROUGH EARLY NEXT
WEEK. CURRENT FORECAST DOES NOT REFLECT THIS BUT THERE WILL BE A
SLIGHT CHANCE OF THUNDERSTORMS ALONG THE NV BORDER ON SATURDAY
AND SUNDAY AFTERNOONS. WESTERLY FLOW WILL SUPPRESS THE RIDGE ON
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 /06Z THURSDAY THROUGH FRIDAY/
ISSUED 1156 PM MDT WED AUG 5 2026
REDUCED VISIBILITY DUE TO WILDFIRE SMOKE, WITH AREAS OF MVFR-IFR AND
MOUNTAIN OBSCURATION, OTHERWISE VFR. HIGH DENSITY ALTITUDE EACH
AFTERNOON DUE TO HOT TEMPERATURES. SURFACE WINDS: VARIABLE LESS
THAN 10 KT OVERNIGHT, BECOMING WNW 8-12 KT AFTER 18Z. WINDS
ALOFT AT 10KFT MSL: W-NW 5-15 KT SHIFTING TO SW 5-15KT BY 18Z.
KBOI...WILDFIRE SMOKE, GENERALLY REMAINING VFR. MOUNTAINS
OBSCURED AT TIMES. SURFACE WINDS: VARIABLE LESS THAN 5 KT,
BECOMING WNW AROUND 10 KT AFTER 18Z THURSDAY.
BOI WATCHES/WARNINGS/ADVISORIES
ID...AIR QUALITY ALERT UNTIL 2 PM MDT FRIDAY FOR IDZ011>015-028-029-
033.
HEAT ADVISORY FROM 2 PM THURSDAY TO 9 PM MDT SATURDAY FOR
IDZ012-014>016-029-030-033.
AIR QUALITY ALERT UNTIL 1 PM MDT THURSDAY FOR IDZ016-030.
OR...HEAT ADVISORY FROM 2 PM MDT /1 PM PDT/ THURSDAY TO 9 PM MDT /8
PM PDT/ SATURDAY FOR ORZ061>064.
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.....CH
SHORT TERM...JM
LONG TERM....KA
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