119
FXUS65 KBOI 252041
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
241 PM MDT MON MAY 25 2026
KEY MESSAGES
- GUSTY WINDS TODAY, RESULTING IN CRITICAL FIRE WEATHER
CONDITIONS IN SOUTHEASTERN OREGON.
- SCATTERED SHOWERS/THUNDERSTORMS IN IDAHO TODAY WITH OUTFLOW
GUSTS AS STRONG AS 60 MPH AND BLOWING DUST.
- MUCH COOLER TUESDAY THROUGH THE REST OF THE WEEK AS
PRECIPITATION CONTINUES.
SHORT TERM /THROUGH WEDNESDAY NIGHT/
WARM TODAY WITH HIGH TEMPS 10-15 DEGREES ABOVE NORMAL. A STRONG
COLD FRONT WILL PASS THROUGH EASTERN OREGON TONIGHT AND WESTERN
IDAHO TOMORROW MORNING. AHEAD OF THE COLD FRONT, HIGH BASED
SHOWERS AND THUNDERSTORMS ARE DEVELOPING IN SW IDAHO HIGHLANDS
AND IN CENTRAL IDAHO MOUNTAINS. THESE STORMS ARE CAPABLE OF
PRODUCING OUTFLOWS 40-60 MPH IN AN ENVIRONMENT WITH 1000 J/KG OF
DCAPE. ALSO AHEAD OF THE FRONT, WINDS ACROSS THE AREA ARE
INCREASING. IN SE OREGON, SUSTAINED WINDS OF 20-30 MPH AND GUSTS
UP TO 40 MPH WITH DRY CONDITIONS HAVE PROMPTED THE ISSUANCE OF A
RED FLAG WARNING. WINDS IN SW IDAHO WILL BE SLIGHTLY LOWER,
10-20 MPH SUSTAINED AND GUSTS UP TO 30 MPH OUTSIDE OF
THUNDERSTORMS. WINDS WILL ALSO KICK UP BLOWING DUST, LOCALLY
REDUCING VISIBILITY AND AIR QUALITY. WHILE STORMS TODAY ARE HIGH
BASED AND DRY, TONIGHT AND TOMORROW BEHIND THE FRONT
PRECIPITATION CHANCES INCREASE AND TEMPERATURES DROP DOWN TO
NEAR NORMAL. SCATTERED SHOWERS CONTINUE OVER THE REGION THROUGH
WEDNESDAY, WITH STORM TOTAL RAINFALL AMOUNTS AROUND 0.25 INCHES
FOR MUCH OF THE AREA, LOWER IN THE SNAKE PLAIN AND HIGHER OVER
MOUNTAINS. THUNDERSTORMS ARE POSSIBLE EACH AFTERNOON/EVENING
WITH GUSTY WINDS AND HEAVIER RAINFALL RATES.
LONG TERM /THURSDAY THROUGH MONDAY/
AN ACTIVE WEATHER PATTERN WILL CONTINUE THROUGH MOST OF THE
LONG-TERM PERIOD, AS THE UPPER LOW LINGERING OVER THE GREAT
BASIN WILL CONTINUE WIDESPREAD SHOWERS AND THUNDERSTORMS
THURSDAY THROUGH SATURDAY. TEMPERATURES WILL MOSTLY HOVER NEAR
OR SLIGHTLY BELOW NORMAL THROUGH THE END OF THE WEEK. AN UPPER
TROUGH WILL SLOWLY STEER INTO THE NORTHWEST REGION FROM OFF THE
COAST OF BRITISH COLUMBIA OVER THE WEEKEND. THERE IS STRONG
GUIDANCE AGREEMENT THAT THIS LARGER SYSTEM WILL SWALLOW THE LOW
OVER THE GREAT BASIN AND STEER IT AS A SHORTWAVE TROUGH OVER OUR
AREA. THIS PATTERN WILL LIKELY CONTINUE WIDESPREAD SHOWERS AND
THUNDERSTORMS ON SATURDAY. SUNDAY WILL LIKELY SEE
SHOWERS/THUNDERSTORMS OVER HIGHER TERRAIN AS THIS MERGED SYSTEM
MOVES OUT, BEFORE A BROAD RIDGE BUILDS IN AND RETURNS WARMER AND
DRIER CONDITIONS EARLY NEXT WEEK.
AVIATION /18Z MONDAY THROUGH TUESDAY/
ISSUED 1127 AM MDT MON MAY 25 2026
GENERALLY VFR. SCATTERED THUNDERSTORMS OVER SW ID AND E-CENTRAL
OR THIS AFTERNOON/EVENING. THUNDERSTORMS CAPABLE OF 30-50 KT
OUTFLOWS AND BLOWING DUST. SHOWERS INCREASING ACROSS EASTERN OR
EARLY TUE/AM, WITH CEILINGS LOWERING TO MVFR NEAR KBKE/KBNO.
SURFACE WINDS OUTSIDE OF STORMS: SE-SW 10-20 KT WITH AFTERNOON
GUSTS TO 15-35 KT, WITH STRONGEST WINDS OVER EASTERN OR. A COLD
FRONT TONIGHT WILL SWITCH WINDS TO W-NW 10-20 KT WITH GUSTS
30-40 KT, STRONGEST NEAR KBKE/KONO. WINDS ALOFT AT 10KFT MSL:
S-SW 10-25 KT.
KBOI...VFR. A 30% CHANCE OF THUNDERSTORMS AFFECTING THE TERMINAL
THIS AFTERNOON FROM 20Z TO TUE/00Z. THUNDERSTORMS WILL BE
CAPABLE OF OUTFLOWS TO 30-50 KT, LIGHTNING, AND BLOWING DUST.
SURFACE WINDS OUTSIDE OF STORMS: SE-S 8-12 KT WITH GUSTS UP TO
20 KT THIS AFTERNOON, BECOMING NW 10-15 KT TONIGHT FOLLOWING A
COLD FRONT.
FIRE WEATHER
ABOVE NORMAL TEMPERATURES, MINIMUM RH 10-15%, AND GUSTY WINDS
30-45 MPH HAVE PROMPTED THE ISSUANCE OF A RED FLAG WARNING IN
SOUTHEAST OREGON THIS AFTERNOON AND EVENING. A COLD FRONT,
EXPECTED LATE TONIGHT, WILL BRING GUSTY PRE-FRONTAL SOUTHWEST
WINDS WITHIN THE ALREADY WARM AND DRY ENVIRONMENT. SCATTERED
THUNDERSTORMS IN SOUTHWEST IDAHO THIS AFTERNOON AND EVENING WILL
BRING LIGHTNING AND OUTFLOW WIND GUSTS AS STRONG AS 60 MPH.
MORNING RH WILL BE SUBSTANTIALLY HIGHER WEDNESDAY THROUGH NEXT
SUNDAY, AND THERE WILL BE A 30-40% CHANCE OF WETTING RAIN EACH
DAY AS THE MAIN LOW PRESSURE SYSTEM ALOFT REMAINS RIGHT OVER THE
DISTRICT.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...RED FLAG WARNING UNTIL 8 PM PDT THIS EVENING FOR ORZ670-672.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
SHORT TERM...JM
LONG TERM....JY
AVIATION.....JY
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