753
FXUS65 KBOI 232325
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
525 PM MDT SAT MAY 23 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- MOSTLY DRY WITH TEMPERATURES 10 TO 15 DEGREES ABOVE NORMAL
THROUGH MEMORIAL DAY.
- GUSTY WINDS MONDAY AHEAD OF A PACIFIC COLD FRONT, RESULTING
IN ELEVATED FIRE WEATHER CONDITIONS IN EASTERN OREGON.
- MUCH COOLER WITH GUSTY WINDS AND A CHANCE OF SHOWERS AND
THUNDERSTORMS TUESDAY THROUGH THURSDAY.
SHORT TERM /THROUGH MONDAY NIGHT/
ISSUED 203 PM MDT SAT MAY 23 2026
HIGH PRESSURE REMAINS IN CONTROL THROUGH MONDAY WITH INCREASING
SOUTHWEST FLOW ALOFT. THIS WILL PUMP UP THE TEMPERATURES BOTH
SUNDAY AND MONDAY, WITH A 75-85 PERCENT CHANCE OF EXCEEDING 90
DEGREES IN THE LOWER VALLEYS ON MONDAY. WINDS ARE EXPECTED TO
PICK UP FROM THE SOUTHWEST MONDAY AFTERNOON, ESPECIALLY ACROSS
EASTERN OREGON. THESE INCREASING WINDS IN COMBINATION WITH LOW
RELATIVE HUMIDITY, ARE EXPECTED TO CREATE AN ELEVATED RISK OF
DANGEROUS FIRE WEATHER CONDITIONS FOR PORTIONS OF MALHEUR AND
HARNEY COUNTIES. ANYONE WITH OUTDOOR PLANS ON MONDAY ACROSS
EASTERN OREGON SHOULD MONITOR THE SITUATION CLOSELY.
LONG TERM /TUESDAY THROUGH SATURDAY/
ISSUED 203 PM MDT SAT MAY 23 2026
UNSETTLED CONDITIONS ARE EXPECTED FOR MUCH OF THE WEEK AS A
TROUGH OF LOW PRESSURE WORKS THROUGH THE REGION. GUIDANCE IS
COMING INTO FOCUS ON A TROUGH PATH THAT BRINGS THE LOW INTO
NORTHERN NEVADA EARLY IN THE WEEK BEFORE LIFTING IT NORTHWARD
THROUGH IDAHO AND EVENTUALLY INTO MONTANA. ENOUGH MOISTURE IS
FORECAST THAT MOST AREAS WILL SEE MEASURABLE PRECIPITATION.
TEMPERATURES WILL DROP TO 10-15 DEGREES BELOW NORMAL TUESDAY
THROUGH THURSDAY, AND SNOW LEVELS ARE EXPECTED TO DROP BELOW
8000 FEET WEDNESDAY. BEHIND THE TROUGH THERE IS GOOD AGREEMENT
THAT HIGH PRESSURE WILL AGAIN BUILD ACROSS THE REGION INTO THE
WEEKEND.
AVIATION /00Z SUNDAY THROUGH MONDAY/
ISSUED 523 PM MDT SAT MAY 23 2026
VFR. VIRGA/ISOLATED THUNDERSTORMS NEAR THE NEVADA BORDER,
CAPABLE OF OUTFLOW GUSTS TO 35 KT. ACTIVITY WILL DECREASE AROUND
SUNSET, THEN RETURN NEAR THE ID-NV BORDER SUNDAY PM. SURFACE
WINDS W TO N 5-15 WITH GUSTS TO 15-20 KT, THEN VARIABLE UP TO
10 KT BEGINNING AROUND SUNSET. WINDS ALOFT AT 10KFT: WSW 10-20
KT.
KBOI...VFR. SURFACE WINDS: NW-N 5-10 KT WITH OCCASIONAL GUSTS
AROUND 15 KT, THEN SE OR VARIABLE AROUND 5 KT AFTER 02Z THIS
EVENING.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...NONE.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....SH
SHORT TERM...MC
LONG TERM....MC
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