722
FXUS65 KBOI 071826
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1226 PM MDT FRI AUG 7 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- VERY HOT TEMPERATURES THROUGH SATURDAY.
- SMOKE PERSISTING THROUGH AT LEAST SUNDAY.
- BREEZY AFTERNOON WINDS FRIDAY THROUGH SUNDAY.
- SLIGHT CHANCE OF THUNDERSTORMS ALONG THE ID/NV SATURDAY
AND SUNDAY AS HIGH-LEVEL MONSOON MOISTURE ADVANCES
NORTHWARD.
SHORT TERM /THROUGH SUNDAY NIGHT/
ISSUED 110 AM MDT FRI AUG 7 2026
HOT AND SMOKY CONDITIONS WILL PERSIST THROUGH THIS WEEKEND,
WITH AN UPPER LEVEL HIGH OVER THE GREAT BASIN. THIS AFTERNOON
WILL BE THE WARMEST DAY OF THE PERIOD, WITH TEMPERATURES IN THE
SNAKE PLAIN WARMING TO AROUND 100 DEGREES (LOCALLY UP TO 105
DEGREES). ACROSS THE HIGH DESERT AND MOUNTAIN VALLEYS,
TEMPERATURES WILL REACH THE MID TO UPPER 90S. SATURDAY AFTERNOON
WILL FEATURE SIMILAR TEMPERATURES, ALTHOUGH GENERALLY A COUPLE
DEGREES COOLER THAN TODAY. WHILE THE AFTERNOONS WILL BE HOT, DRY
CONDITIONS WILL ALLOW FOR GOOD RADIATIONAL COOLING OVERNIGHT.
THIS WILL ALLOW FOR LOWER ELEVATION OVERNIGHT LOWS GENERALLY IN
THE 60S. A WEEK UPPER LEVEL DISTURBANCE WILL AID IN WEAKENING
THE RIDGE COME LATE SATURDAY INTO SUNDAY. THIS FEATURE WILL
BRING IN BREEZY CONDITIONS THIS WEEKEND WITH MORE COOLING COME
SUNDAY. THE STRONGEST GUSTS WILL COME SATURDAY AFTERNOON, WITH
GUSTS TO AROUND 25 MPH, PRIMARILY IN THE SOUTHERN ZONES AND
TYPICAL BREEZY SPOTS OF THE SNAKE PLAIN.
SOME MID-LEVEL MONSOONAL MOISTURE WILL BEGIN TO WORK ITS WAY
AROUND THE GREAT BASIN HIGH TODAY AND THROUGH THE WEEKEND. WHILE
THIS MOISTURE WILL STAY SOUTH OF OUR AREA THIS AFTERNOON, IT
WILL CONTINUE TO CREEP NORTH TO THE ID/NV BORDER COME SATURDAY
AND SUNDAY. WHILE THE MOISTURE REACHING OUR AREA WILL BE RATHER
MARGINAL (PWAT VALUES IN THE 70-75TH PERCENTILE OF CLIMATOLOGY
AS THE LREF SEES IT), IT COULD ALLOW FOR THE DEVELOPMENT OF
HIGH-BASED SHOWERS/THUNDERSTORMS NEAR THE ID/NV BORDER COME
SATURDAY/SUNDAY AFTERNOONS. WHILE CHANCES ARE LOW (GENERALLY
UNDER 15%), WITH DRY LOW-LEVELS EVEN VIRGA SHOWERS COULD PRODUCE
GUSTY AND ERRATIC WINDS.
LONG TERM /MONDAY THROUGH FRIDAY/
ISSUED 110 AM MDT FRI AUG 7 2026
FOLLOWING THE PASSAGE OF THE WEAK DISTURBANCE IN THE SHORT-TERM,
FLOW ALOFT WILL TAKE ON A ZONAL POSTURE WITH THE HIGH PRESSURE
ALOFT SHIFTING TO OUR SOUTH. TEMPERATURES ON MONDAY WILL COOL
TO NEAR NORMAL, WHERE THEY WILL HOVER THROUGHOUT THE REST OF THE
PERIOD. EACH AFTERNOON WILL ALSO FEATURE BREEZY CONDITIONS.
UNCERTAINTY IN THE PATTERN EVOLUTION BEGINS TO INCREASE COME
MID-WEEK THIS COMING WEEK. THE LREF GRAND ENSEMBLE INDICATES
TROUGHING DEVELOPING OVER THE PACIFIC NORTHWEST COME MIDWEEK AND
BEYOND, WITH ANOTHER PUSH OF MONSOONAL MOISTURE MAKING ITS WAY
NORTH. FOR NOW THE LONG-TERM FORECAST IS DRY, BUT THE MONSOONAL
PUSH WILL BE MONITORED FOR THE POTENTIAL NEED TO INTRODUCE
PRECIP AND THUNDER CHANCES AS THE PATTERN EVOLUTION COMES INTO
BETTER FOCUS.
AVIATION /18Z FRIDAY THROUGH SATURDAY/
ISSUED 1223 PM MDT FRI AUG 7 2026
AREAS OF MVFR VISIBILITY AND MOUNTAIN OBSCURATION DUE TO WILDFIRE
SMOKE, MAINLY IN OR. HIGH DENSITY ALTITUDE DUE TO HOT AFTERNOON
TEMPERATURES. SURFACE WINDS: W/NW 8-14 KT UNTIL SUNSET THAN VARIABLE
LESS THAN 8 KT. WINDS ALOFT AT 10KFT MSL: W-SW 5-15 KT.
KBOI...SMOKE FROM NEARBY WILDFIRES IMPACTING VISIBILITY THROUGHOUT
THE DAY WITH BRIEF MVFR CONDITIONS. FOOTHILLS BRIEFLY OBSCURED IN
SMOKE. SURFACE WINDS: NW 8 TO 14 KT UNTIL SUNSET, THEN LIGHT SE.
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. A 15% 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 1 PM MDT MONDAY FOR IDZ011>015-028-029-
033.
HEAT ADVISORY UNTIL 9 PM MDT SATURDAY FOR IDZ012-014>016-029-
030-033.
OR...AIR QUALITY ALERT UNTIL 1 PM MDT /NOON PDT/ MONDAY FOR
ORZ061>064.
HEAT ADVISORY UNTIL 9 PM MDT /8 PM PDT/ SATURDAY FOR
ORZ061>064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....LC
SHORT TERM...NF
LONG TERM....NF
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