599
FXUS65 KBOI 241802
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1202 PM MDT FRI JUL 24 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- VERY HOT, DRY, AND BREEZY TO END THE WEEK.
- AREAS OF SMOKE WILL CONTINUE THROUGH THE WEEKEND, MAINLY IN
THE MORNING AND OVERNIGHT HOURS.
- CRITICAL FIRE WEATHER CONDITIONS, MAINLY OVER SOUTHEAST OR AND
HIGH TERRAIN OF SOUTHWEST ID, THROUGH SATURDAY EVENING.
SHORT TERM /THROUGH SUNDAY NIGHT/
ISSUED 345 AM MDT FRI JUL 24 2026
A WARMING AND DRYING TREND WILL START TODAY, WITH TEMPERATURES
CLIMBING TO OVER 100 DEGREES THROUGHOUT MUCH OF THE LOWER SNAKE
PLAIN. AS SUCH, A HEAT ADVISORY WILL CONTINUE THROUGH SATURDAY
EVENING. LINGERING MONSOONAL MOISTURE WILL FAVOR ISOLATED
THUNDERSTORMS OVER THE MAGIC VALLEY IN THE AFTERNOON TODAY, AND
AGAIN SATURDAY AFTERNOON. AN UPPER LOW STEERING INTO THE PACIFIC
NORTHWEST COAST WILL BRING ELEVATED SOUTHWESTERLY WINDS THROUGH
THE WEEKEND, WHILE KEEPING OUR AREA ON THE DRY SIDE. HOT, DRY,
AND WINDY CONDITIONS WILL PERSIST THROUGH SATURDAY ACROSS
EASTERN OREGON AND HIGHER TERRAIN OF SOUTHWEST IDAHO, LEADING TO
CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON THROUGH
SATURDAY EVENING. SUNDAY WILL SEE DRY CONDITIONS ACROSS ALL
AREAS, AND SLIGHTLY LOWER TEMPERATURES HOVERING IN THE MID 90S
FOR THE SNAKE PLAIN. SUNDAY WILL ALSO SEE LOWERED WIND GUSTS
ACROSS ALL AREAS. WILDFIRE SMOKE WILL LINGER OVER THE AREA, MOST
NOTABLY EACH NIGHT AND MORNING BEFORE MIXING OUT DURING THE
AFTERNOONS FROM THE ELEVATED SOUTHWEST WINDS.
LONG TERM /MONDAY THROUGH FRIDAY/
ISSUED 345 AM MDT FRI JUL 24 2026
COME MONDAY, THE UPPER TROUGH OVER THE NORTHWEST COAST WILL KEEP OUR
AREA UNDER A SOUTHWESTERLY FLOW ON THE DRY SIDE. TUESDAY THROUGH THE
END OF THE WEEK WILL GENERALLY SEE THE RETURN OF HOTTER CONDITIONS,
AS THE STRONG HIGH PRESSURE RIDGE OFF THE GREAT BASIN BUILDS BACK IN
OVER THE ENTIRE WESTERN CONUS. THIS RIDGING PATTERN WILL STILL ALLOW
SOME MONSOONAL MOISTURE TO REACH SOUTH-CENTRAL IDAHO AROUND MIDWEEK,
FAVORING A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS MAINLY NEAR THE
MAGIC VALLEY AND THE IDAHO-NEVADA BORDER. OTHERWISE, AREAS WILL
GENERALLY BE WARM, DRY, AND BREEZY THROUGHOUT THE EXTENDED
FORECAST.
AVIATION /18Z FRIDAY THROUGH SATURDAY/
ISSUED 1202 PM MDT FRI JUL 24 2026
WILDFIRE SMOKE LEADING TO VISIBILITY REDUCTIONS, WITH AREAS OF
MVFR IN E-OREGON AND W-IDAHO, MOST NOTABLE OVERNIGHT. VISIBILITY
SHOULD IMPROVE THIS AFTERNOON. ISOLATED TO SCATTERED
THUNDERSTORMS THIS AFTERNOON NEAR KTWF/KJER, THUNDER CAPABLE OF
OUTFLOWS TO 40 KT AND BRIEF HEAVY RAIN. HIGH DENSITY ALTITUDE
THIS AFTERNOON DUE TO HEAT. SURFACE WINDS: SW-NW 5-15 KT WITH
GUSTS UP TO 25 KT IN THE AFTERNOON, STRONGEST IN E-OREGON.
WINDS ALOFT AT 10KFT MSL: SW 15-30 KT.
KBOI...VFR WITH HAZY CONDITIONS DUE TO WILDFIRE SMOKE. HIGH
DENSITY ALTITUDE THIS AFTERNOON DUE TO HEAT. SURFACE WINDS: NW
7-12 KT THIS AFTERNOON. THEN LIGHT AND VARIABLE OVERNIGHT.
WEEKEND OUTLOOK...AREAS OF WILDFIRE SMOKE CONTINUING WITH
LOCALIZED MVFR VISIBILITY DURING LATE NIGHT AND MORNING HOURS,
IMPROVING EACH AFTERNOON. HIGH DENSITY ALTITUDE DUE TO HEAT EACH
AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS ACROSS THE MAGIC
VALLEY SATURDAY AFTERNOON. MOSTLY CLEAR ELSEWHERE. SURFACE
WINDS: SW-NW 5-15 KT WITH GUSTS TO 25 KT, EXCEPT 10-20 KT WITH
GUSTS TO 30 KT ON SATURDAY.
BOI WATCHES/WARNINGS/ADVISORIES
ID...AIR QUALITY ALERT UNTIL 2 PM MDT THIS AFTERNOON FOR IDZ011-012-
014-033.
RED FLAG WARNING UNTIL 9 PM MDT SATURDAY FOR IDZ401-402-423.
HEAT ADVISORY UNTIL 9 PM MDT SATURDAY FOR IDZ012-014-016-033.
RED FLAG WARNING UNTIL 9 PM MDT THIS EVENING FOR IDZ426.
OR...AIR QUALITY ALERT UNTIL 2 PM MDT /1 PM PDT/ THIS AFTERNOON FOR
ORZ061>064.
RED FLAG WARNING UNTIL 9 PM MDT /8 PM PDT/ SATURDAY FOR
ORZ670>675.
HEAT ADVISORY UNTIL 9 PM MDT /8 PM PDT/ SATURDAY FOR ORZ063-
064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....NF
SHORT TERM...JY
LONG TERM....JY
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page