796
FXUS65 KBOI 030943
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
343 AM MDT MON AUG 3 2026
KEY MESSAGES
- SMOKY CONDITIONS CONTINUE THROUGH THE WEEK.
- THE HEAT RETURNS BY MIDWEEK WITH NEAR 100 DEGREE TEMPERATURES
LIKELY AT LOWER ELEVATIONS.
SHORT TERM /THROUGH WEDNESDAY NIGHT/
THE UPPER-LEVEL SHORTWAVE TROUGH THAT BROUGHT GUSTY WINDS
OVERNIGHT INTO EARLY THIS MORNING WILL MOVE EAST OUT OF THE AREA
BY EARLY AFTERNOON. BREEZY WIND GUSTS ARE STILL FORECAST AS
THIS FEATURE MOVES OUT, WITH GUSTS 20-30 MPH EAST OF BOISE
THROUGH THE SNAKE PLAIN. TEMPERATURES WILL BE SEASONABLY COOL
TODAY BEFORE THE NEXT MAJOR SYNOPTIC PATTERN STARTS TO BUILD IN.
NORTHWEST FLOW ALOFT WILL DEVELOP BEHIND THE SHORTWAVE,
ACCORDANT WITH UPPER-LEVEL RIDGING BUILDING IN ACROSS THE
PACIFIC NORTHWEST. THIS RIDGING WILL SLOWLY BUILD EAST ACROSS
THE REGION STARTING TUESDAY AND STRENGTHEN FURTHER ON WEDNESDAY
AS IT STARTS TO BUILD OVERHEAD. WINDS WEAKEN AND TEMPERATURES
TREND WARMER STARTING TUESDAY, WITH BOTH TRENDS CONTINUING
FURTHER MORESO WEDNESDAY.
AREAS NEAR/DOWNWIND OF LARGE FIRES WILL CONTINUE TO DEAL WITH
THICKER SMOKE THROUGH THIS MORNING. STARTING THIS AFTERNOON (AND
ESPECIALLY INTO EVENING), THE FLOW ALOFT SHIFTING TO A MORE
NORTHERLY COMPONENT MENTIONED PREVIOUSLY WILL BRING SMOKE INTO
THE AREA FROM THE LARGE FIRES IN WA. COMBINED WITH WEAKENING
WIND SPEEDS, WIDESPREAD SMOKE IMPACTS ARE EXPECTED MONDAY
EVENING ONWARDS.
LONG TERM /THURSDAY THROUGH MONDAY/
THE UPPER-LEVEL RIDGE WILL FURTHER CEMENT ITSELF ACROSS THE
GREAT BASIN / FOUR CORNERS REGION. THIS WILL CONTINUE HOT
TEMPERATURES DAILY ACROSS THE REGION. TEMPERATURES WILL BE 5-10
DEGREES ABOVE NORMAL WITH LOWER VALLEYS NEAR 100 DEGREES
THURSDAY THROUGH SATURDAY. CONDITIONS WILL REMAIN DRY WITH
SEASONAL AFTERNOON BREEZINESS. ON SUNDAY, SOME MODELS ARE
HINTING AT A POSSIBLE UPPER- LEVEL TROUGH MOVING EAST ACROSS THE
PACIFIC NORTHWEST. WHILE IT DOESN'T LOOK TO INCLUDE
PRECIPITATION CHANCES AS OF THIS FORECAST, IT WOULD PROVIDE
INCREASED WIND SPEEDS, ENHANCING FIRE WEATHER CONCERNS.
OTHERWISE, SMOKY CONDITIONS WILL CONTINUE FROM AREA WILDFIRES.
AVIATION /06Z MONDAY THROUGH TUESDAY/
ISSUED 1203 AM MDT MON AUG 3 2026
REDUCED VISIBILITY DUE TO WILDFIRE SMOKE, WITH AREAS OF MVFR-IFR AND
MOUNTAIN OBSCURATION. SURFACE WINDS: W-N 5-15 KT WITH AREAS OF GUSTS
TO 15-25 KT THROUGH MONDAY. EXCEPT, NW GUSTS TO 30-40 KT BETWEEN
KBKE-KONO THROUGH EARLY AM. WINDS ALOFT AT 10KFT MSL: W 15-30 KT
BECOMING NW 5-15 KT AFTER MON/12Z.
KBOI...SMOKY, LOW VFR WITH MVFR AT TIMES THROUGH MONDAY. LIKELY
DEGRADING TO MVFR-IFR MONDAY EVENING. SURFACE WINDS: NW 5-15 KT.
AFTERNOON GUSTS AROUND 20 KT.
BOI WATCHES/WARNINGS/ADVISORIES
ID...AIR QUALITY ALERT UNTIL 2 PM MDT THIS AFTERNOON FOR IDZ011-012-
014-015-029-033.
OR...AIR QUALITY ALERT UNTIL 3 PM MDT /2 PM 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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