305
FXUS65 KBOI 011724
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1124 AM MDT THU OCT 1 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- DRY WITH TEMPERATURES AVERAGING 10-15 DEGREES ABOVE NORMAL
THROUGH NEXT WEEK.
- MINOR DISTURBANCE ON MONDAY COULD BRING SHOWERS TO HIGHER
TERRAIN ALONG THE NV BORDER AND SOUTH-CENTRAL IDAHO MOUNTAINS.
SHORT TERM /THROUGH SATURDAY NIGHT/
ISSUED 308 AM MDT THU OCT 1 2026
AN UPPER RIDGE CENTERED OVER THE FAR SOUTHWEST U.S. WILL BUILD
NORTHWARD TODAY AND INFLUENCE THE FORECAST AREA. TEMPERATURES
IN SOUTHEAST OREGON AND SOUTHWEST IDAHO WILL CLIMB AROUND 10
DEGREES ABOVE NORMAL, PUSHING LOW ELEVATION TEMPS INTO THE LOW
80S THIS AFTERNOON. FURTHER WARMING IS EXPECTED FRIDAY AND
SATURDAY AS HIGH PRESSURE EXPANDS, WITH MANY LOWER SITES
REACHING MID 80S. A WEAK FEATURE WILL PASS TO THE NORTH ON
FRIDAY AND BRING A PERIOD OF HIGH CLOUD COVER AND
WEST/NORTHWEST SURFACE WINDS, BUT FAIR CONDITIONS ARE STILL
ANTICIPATED THROUGH SATURDAY.
LONG TERM /SUNDAY THROUGH THURSDAY/
ISSUED 308 AM MDT THU OCT 1 2026
THE AFOREMENTIONED RIDGE WILL SHIFT EAST ON SUNDAY, OPENING THE
DOOR FOR WARM SOUTHERLY FLOW TO INFILTRATE THE AREA. TEMPERATURES
WILL CLIMB FURTHER ABOVE NORMAL, PEAKING IN THE UPPER 80S TO
AROUND 90 FOR LOWER SITES. A WEAK DISTURBANCE WILL PASS THROUGH
THE REGION LATE SUNDAY INTO MONDAY, INCREASING CLOUD COVER AND
SUPPORTING A LOW CHANCE (5-10%) OF SHOWERS NEAR THE NV BORDER
AND SOUTH-CENTRAL IDAHO MOUNTAINS. TEMPERATURES WILL COOL BY A
COUPLE OF DEGREES MON/TUE, BEFORE THE UPPER RIDGE REBOUNDS AND
WARM AND DRY CONDITIONS PREVAIL.
AVIATION /18Z THURSDAY THROUGH FRIDAY/
ISSUED 1120 AM MDT THU OCT 1 2026
VFR. AREAS OF THIN SMOKE LAYERS ALOFT/HAZE AT THE SURFACE,
ESPECIALLY NORTH OF KBNO AND NEAR KMYL. PATCHY FOG IN SHELTERED
MOUNTAIN VALLEYS FRIDAY MORNING. SURFACE WINDS: VARIABLE UP TO
12 KT. WINDS ALOFT AT 10KFT MSL: W-SW 10-20 KT.
KBOI...VFR AND MOSTLY CLEAR. SURFACE WINDS: LIGHT AND VARIABLE
THROUGH MORNING, THEN NW 3-8 KT IN THE AFTERNOON. TRANSITIONING TO
SE 3-8 KT LATE TONIGHT.
WEEKEND OUTLOOK...VFR FRIDAY THROUGH SUNDAY. POTENTIAL FOR THIN
SMOKE LAYERS ALOFT AND HAZE AT THE SURFACE DUE TO PRESCRIBED BURNS
IN THE REGION. SURFACE WINDS: SW-NW 5-15 KT FRIDAY, WITH AFTERNOON
GUSTS AROUND 20 KT NEAR NV BORDER. THEN, VARIABLE UP TO 10 KT
SAT/SUN.
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.....CH
SHORT TERM...SH
LONG TERM....SH
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