702
FXUS65 KBOI 241141
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
541 AM MDT SUN MAY 24 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- MOSTLY DRY THROUGH MONDAY (MEMORIAL DAY) WITH TEMPERATURES10
TO 15 DEGREES ABOVE NORMAL. ISOLATED LATE DAY/EVENING
THUNDERSTORMS NEAR THE ID/NV BORDER TODAY AND AGAIN MONDAY.
- 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 FRIDAY.
SHORT TERM /THROUGH TUESDAY NIGHT/
ISSUED 216 AM MDT SUN MAY 24 2026
LATEST MODELS STILL SHOW MONDAY THE WARMEST DAY BEFORE A STRONG
SURFACE COLD FRONT COMES IN AHEAD OF A DEEP UPPER LOW CURRENTLY
IN THE GULF OF ALASKA 50N/152W. MODELS CONTINUE TO ADJUST THE
TRACK OF THE UPPER LOW WESTWARD, NOW FORECAST ON THE NORTHERN OR
COAST MONDAY NIGHT, THEN SSE-WARD THROUGH OREGON TUESDAY, TO NW
NEVADA TUESDAY NIGHT. THE SURFACE COLD FRONT SHOULD THEREFORE
BE SLOWER TO PASS THROUGH OUR CWA, NOW ESTIMATED THROUGH SE
OREGON MONDAY NIGHT AND SW IDAHO TUESDAY MORNING. IN ADDITION,
AHEAD OF THE FRONT SUNDAY AND ESPECIALLY MONDAY WILL BE
INCREASINGLY WINDY, WITH ENOUGH MID-LEVEL MOISTURE FOR ISOLATED
LATE AFTERNOON/EVENING THUNDERSTORMS NEAR THE ID/NV BORDER. PRE-
FRONTAL WIND AND LOW-HUMIDITY WILL INCREASE FIRE DANGER IN SE
OREGON, ESPECIALLY ON MONDAY. BEHIND THE COLD FRONT TUESDAY WILL
AVERAGE 25 DEGREES COOLER THAN MONDAY, BUT WIND SPEEDS HAVE BEEN
SLIGHTLY LOWERED FROM PREVIOUS FORECAST.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
ISSUED 216 AM MDT SUN MAY 24 2026
MODEL FORECASTS OF THE UPPER LOW HAVE CHANGED SINCE LAST NIGHT.
LAST NIGHT'S MODELS TOOK THE LOW ACROSS NV WEDNESDAY AND
THURSDAY, AND INTO COLORADO FRIDAY. TODAY'S MODELS KEEP THE LOW
STATIONARY IN NW NV THROUGH THURSDAY, THEN INTO SOUTHERN ID
FRIDAY AND SATURDAY AS A WEAKENING UPPER TROUGH. THIS CHANGE
KEEPS OUR CWA RELATIVELY COOL AND SHOWERY ALL WEEK INSTEAD OF
WARMING AND DRYING AS PREVIOUSLY FORECAST TOWARD THE WEEKEND.
AVIATION /12Z SUNDAY THROUGH MONDAY/
ISSUED 540 AM MDT SUN MAY 24 2026
VFR. ISOLATED THUNDERSTORMS NEAR THE ID-NV BORDER THIS
AFTERNOON/EVENING, WITH GUSTS AS STRONG AS 35-45 KT AND BLOWING
DUST. SURFACE WINDS:
VARIABLE UP TO 10 KT, THEN SW-NW 5-15 KT AFTER SUN/16Z. WINDS
ALOFT AT 10KFT: W-SW 15-20 KT.
KBOI...VFR. CLEAR SKY. SURFACE WINDS: SE AROUND 5 KT, THEN NW-N
5-10 KT AFTER 15Z. AFTERNOON GUSTS TO 15 MPH.
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.....LC
SHORT TERM...LC
LONG TERM....LC
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