282
FXUS65 KBOI 302156
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
356 PM MDT SUN AUG 30 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- COOL AND DRY TODAY THEN WARMER MON AND TUE.
- CHANCE OF THUNDERSTORMS IN S-CENTRAL ID MON, AND CENTRAL ID
TUE AFTERNOONS.
- A STRONG LOW PRESSURE SYSTEM EXPECTED LATER THIS WEEK WILL
BRING COOLER, WINDIER, AND WETTER CONDITIONS.
SHORT TERM /THROUGH TUESDAY NIGHT/
ISSUED 203 PM MDT SUN AUG 30 2026
COOLER TEMPS TODAY AND CLEAR SKIES WILL BE SHORT LIVED AS A
BRIEF RIDGE BUILDS IN MONDAY ALONGSIDE WARMER SOUTHWESTERLY
FLOW. TEMPERATURES WARM ABOUT 10 DEGREES SUNDAY INTO MONDAY,
RIGHT AROUND SEASONAL AVERAGES FOR THIS TIME OF YEAR. BEHIND THE
SHORTWAVE RIDGE, A STRONG UPPER LEVEL LOW PRESSURE SYSTEM
BRINGS A SIGNIFICANT SHIFT TUESDAY ONWARDS. THE MOISTURE AHEAD
OF THIS SYSTEM WILL SUPPORT ISOLATED THUNDERSTORMS IN THE MAGIC
VALLEY MONDAY. THUNDERSTORM ACTIVITY MOVES NORTH INTO THE
CENTRAL IDAHO HIGHLANDS AND MOUNTAINS FOR TUESDAY. ADDITIONALLY,
WINDS BEGIN TO INCREASE TUESDAY AFTERNOON, WITH GUSTS UP TO 30
MPH ACROSS THE AREA OUTSIDE OF SHELTERED VALLEYS. THE WARMER
TEMPS ARE SHORTLIVED MONDAY AND TUESDAY, BEFORE A COOL DOWN
TUESDAY NIGHT AS THE LOW MOVES PROPERLY INTO THE REGION.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
ISSUED 203 PM MDT SUN AUG 30 2026
A CHANCE OF PRECIPITATION WILL FOLLOW THE EXITING SHORTWAVE TROUGH
ON WEDNESDAY AS A DEEPER CLOSED LOW DROPS DOWN THE COAST. INITIALLY
THE LOW IS FAIRLY BROAD AS IT SPANS THE EXITING TROUGH. THIS WILL
KEEP A 30-60% CHANCE OF SHOWERS ACROSS SE OREGON AND THE W-CENTRAL
ID MTNS THROUGH THURSDAY. PRECIPITATION RETRACTS WESTWARD ON FRIDAY
AS THE LOW CONSOLIDATES ALONG THE OREGON COAST AND THE REGION FALLS
UNDER A DRIER SOUTHERLY FLOW, OUT OF THE REACH OF THE DEEPER
MOISTURE AND DYNAMICS. FROM HERE WE'LL BE WATCHING FOR WHEN/HOW THE
LOW LIFTS EASTWARD AS THIS COULD BRING ANOTHER ROUND OF SHOWERS AND
POSSIBLE THUNDERSTORMS. EARLY GUIDANCE WOULD INDICATE LATE IN THE
WEEKEND OR EARLY NEXT WEEK. THE S/SW FLOW ALOFT WILL FAVOR GUSTY
AFTERNOON WINDS OVER ELEVATED TERRAIN, THE STRONGER GUSTS ACROSS
HARNEY, MALHEUR AND OWYHEE COUNTIES. LATE AFTERNOON/EVENING WIND
PUSHES ACROSS SE OREGON COULD SHIFT WINDS TO THE NW FOR THUR/FRI.
THE TEMPERATURE SPREAD (10-90%TILE) INCREASES TO 20 DEGREES FOR THUR-
SUN WITH THE ENSEMBLE MEAN PLACING HIGH TEMPERATURES NEAR OR
SLIGHTLY BELOW NORMAL.
AVIATION /00Z MONDAY THROUGH TUESDAY/
ISSUED 356 PM MDT SUN AUG 30 2026
VFR UNDER CLEAR SKIES. LOCALIZED VISIBILITY REDUCTIONS DUE TO
SMOKE NEAR WILDFIRES IN BAKER COUNTY AND BOISE MOUNTAINS.
SURFACE WINDS: W-NW 5-15 KT THIS EVENING, THEN LIGHT AND
VARIABLE OVERNIGHT. WINDS ALOFT AT 10KFT MSL: W 5-15 KT.
KBOI...VFR UNDER CLEAR SKIES. NW UNDER 10 KT WINDS BECOMING SE
UNDER 10 KT WINDS OVERNIGHT.
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.....NF
SHORT TERM...JM
LONG TERM....DG
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