222
FXUS65 KBOI 102355
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
555 PM MDT SAT OCT 10 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- COOLER THAN NORMAL TEMPERATURES, 10 TO 15 DEGREES BELOW NORMAL
THROUGH MONDAY.
- UNSETTLED CONDITIONS THROUGH TUESDAY, MAINLY ON THE IDAHO
SIDE.
- SNOW LEVELS NEAR 6000-7000 FEET IN THE WEST CENTRAL ID
MOUNTAINS THROUGH MONDAY WITH LIGHT ACCUMULATIONS, HIGHER
LEVELS TO THE SOUTH AND EAST.
- WARM AND DRY CONDITIONS WEDNESDAY THROUGH NEXT WEEKEND.
SHORT TERM /THROUGH MONDAY NIGHT/
ISSUED 240 PM MDT SAT OCT 10 2026
SLOWLY MOVE SOUTH INTO NORTHERN CA BY SUNDAY WITH A LONG STREAM
OF MOISTURE CONNECTED TO THE REMNANTS OF WHAT WAS RACHEL. MOST
OF THE MOISTURE WILL STAY EAST OF OUR AREA THOUGH, WITH COOLER
TEMPERATURES AND BREEZY CONDITIONS AS THE MAIN IMPACT.
PRECIPITATION OVER EASTERN OR WILL GENERALLY BE LIMITED WITH
THIS SYSTEM, WITH THE BEST CHANCE AND HEAVIEST PRECIPITATION
COMING OVER THE BOISE MOUNTAINS, AND EASTERN MAGIC VALLEY
THROUGH SUNDAY. PRECIPITATION AMOUNTS OF 0.5 TO 1.0 POSSIBLE
GENERALLY FROM TWIN FALLS AND AREAS EAST, WITH UP TO 0.25
POSSIBLE OVER THE REST OF SW IDAHO. SNOW LEVELS FALL TO 5000 TO
6000 FEET IN EASTERN OR, AND NORTH OF MCCALL ID, BUT
PRECIPITATION WILL BE LIMITED. SNOW LEVELS IN ID WILL BE MUCH
HIGHER IN THE WARM SECTOR OF THE SYSTEM, WITH 7000 TO 8000 FEET
OVER THE CENTRAL ID MOUNTAINS. THE TROUGH WILL REMAIN NEARLY
STATIONARY THROUGH MONDAY KEEPING A THREAT OF SHOWERS MAINLY
OVER THE IDAHO SIDE.
LONG TERM /TUESDAY THROUGH SATURDAY/
ISSUED 240 PM MDT SAT OCT 10 2026
DRYING TREND WILL SET IN COME TUESDAY AS THE LOW EXITS TO THE
EAST. OUR FAR EASTERN ZONES MAY END UP ON THE PERIPHERY OF THE
WRAP AROUND PRECIPITATION ASSOCIATED WITH THE LOW, LEADING TO A
20-40% CHANCE OF PRECIPITATION TUESDAY MORNING; GENERALLY SOUTH
AND EAST OF MOUNTAIN HOME. TUESDAY AND WEDNESDAY AFTERNOONS WILL
REMAIN BREEZY AS THE LOW EXITS. BEYOND TUESDAY, A WARMING TREND
WILL SET IN THROUGH THE START OF THE WEEKEND WITH DRY
CONDITIONS. THIS IS THANKS TO A RIDGE THAT WILL BUILD IN OVER
THE WEST COAST BEFORE EVENTUALLY SHIFTING TO BE OVER THE GREAT
BASIN. TEMPERATURES WILL START OUT RIGHT AROUND NORMAL TUESDAY
BEFORE INCREASING TO AROUND 5-10 DEGREES ABOVE NORMAL BY FRIDAY.
AVIATION /00Z SUNDAY THROUGH MONDAY/
ISSUED 540 PM MDT SAT OCT 10 2026
GENERALLY VFR. ISOLATED SHOWERS THIS EVENING NEAR ID-NV BORDER,
WITH LIGHTNING REMAINING S-E OF KTWF. PRECIPITATION INCREASING
FROM SE TO NW EARLY SUN/AM THROUGH SUNDAY NIGHT, MAINLY EAST
AND SOUTH OF KBNO-KONO-KMYL LINE. LOW VFR TO MVFR IN HEAVIER
RAIN. MOUNTAINS BECOMING OBSCURED, WITH IFR-LIFR LIKELY IN HIGH
MTN SNOW IN CENTRAL ID. SNOW LEVELS: 6-9 KFT MSL IN SW IDAHO.
SURFACE WINDS: W-N 5-15 KT WITH GUSTS TO 15-25 KT. WINDS ALOFT
AT 10 KFT MSL: SW-W 10-25 KT, THEN VARIABLE 5-15 KT BY SUN/15Z.
KBOI...VFR. A 30% CHANCE OF LIGHT RAIN TONIGHT, AND AGAIN
SUNDAY LATE AFTERNOON. SURFACE WINDS: NW 6-14 KT THROUGH THE
PERIOD, WITH GUSTS TO AROUND 20 KT BEFORE SUNSET. THEN, GUSTS
RETURNING AFTER SUN/17Z.
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.....SH
SHORT TERM...KA
LONG TERM....NF
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