438
FXUS65 KBOI 302035
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
235 PM MDT WED SEP 30 2026
KEY MESSAGES
- DRY WITH TEMPERATURES TRENDING 5-15 DEGREES ABOVE NORMAL
THROUGH NEXT WEEK.
- MINOR DISTURBANCE ON MONDAY COULD BRING A SHOWERS TO HIGHER
TERRAIN ALONG THE NV BORDER AND SOUTH-CENTRAL IDAHO MOUNTAINS.
SHORT TERM /THROUGH FRIDAY NIGHT/
DRY WESTERLY FLOW WILL BRING GRADUAL WARMING THROUGH FRIDAY.
EFFICIENT RADIATIONAL COOLING OVERNIGHT WILL ALLOW FOR WIDE
DIURNAL TEMPERATURE SPREADS AS HIGH TEMPERATURES REACH 10-15
DEGREES ABOVE NORMAL BY FRIDAY. WEAKER FLOW ALOFT WILL TRANSLATE
TO LIGHTER WINDS. WILD/PRESCRIBED FIRES, MOSTLY ACROSS OREGON
AT THIS TIME, WILL LIKELY KEEP HAZE IN THE REGION THROUGH THE
END OF THE WEEK.
LONG TERM /SATURDAY THROUGH WEDNESDAY/
THE WEEKEND WILL BRING FURTHER WARMING AS AN UPPER RIDGE EXPANDS
NORTHWARD FROM THE DESERT SW. A WEAK DISTURBANCE FORECAST TO
TRACK THROUGH THE NORTHERN GREAT BASIN ON MONDAY WILL BRING A
LOW CHANCE OF SHOWERS AND POSSIBLY A THUNDERSTORM TO AREAS ALONG
THE NORTHERN NV BORDER AND INTO S-CENTRAL IDAHO MTNS. OTHERWISE
WARM AND DRY CONDITIONS WILL CONTINUE THROUGH THE MIDDLE OF
NEXT WEEK WITH HIGH TEMPERATURES HOLDING 10-15 DEGREES ABOVE
NORMAL (LOW-MID 80S AT LOWER ELEVATIONS).
AVIATION /12Z WEDNESDAY THROUGH THURSDAY/
ISSUED 527 AM MDT WED SEP 30 2026
VFR WITH MOSTLY CLEAR SKIES. SCATTERED DAYTIME CUMULUS ACROSS
THE W-CENTRAL ID MTNS, BASES 8-10KFT MSL. LOCAL HAZE DUE TO
SMOKE, MAINLY NORTH OF KBNO-KONO-KMYL. SURFACE WINDS: W TO NW
5-15 KT WITH GUSTS TO 20 KT THROUGH EARLY EVENING THEN MOSTLY
LIGHT AND VARIABLE OVERNIGHT. WINDS ALOFT AT 10KFT MSL: NW
10-20 KT.
KBOI...VFR WITH CLEAR SKIES. NORTHWEST SURFACE WINDS THROUGH
SUNSET WITH OCCASIONAL GUSTS OF 15-20 KT.
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
SHORT TERM...DG
LONG TERM....DG
AVIATION.....DG
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