887
FXUS65 KBOI 131952
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
152 PM MDT SAT SEP 13 2025
SHORT TERM...TONIGHT THROUGH MONDAY NIGHT
A RELATIVELY QUIET
EVENING TONIGHT IS IN STORE, OUTSIDE OF ISOLATED THUNDERSTORMS
OVER THE CENTRAL IDAHO MOUNTAINS. AN UPPER TROUGH IS APPROACHING
FROM THE WEST AND WILL MOVE INTO THE REGION ON SUNDAY, BRINGING
INCREASING CHANCES FOR SHOWERS AND THUNDERSTORMS. SHOWERS WILL
BEGIN IN EASTERN OREGON TUESDAY MORNING, WITH PERHAPS EVEN A FEW
INTO THE TREASURE VALLEY IN THE MORNING HOURS AS WELL. THE PEAK
OF THUNDERSTORM ACTIVITY WILL OCCUR DURING THE AFTERNOON ALONG
THE I- 84 CORRIDOR INTO SOUTHWEST IDAHO, EVENTUALLY SPREADING
INTO THE CENTRAL IDAHO MOUNTAINS BY EARLY EVENING. GUSTY WINDS
TO 50 MPH AND SMALL HAIL WILL ACCOMPANY THE STRONGEST STORMS.
WITH SEASONABLY HIGH PRECIPITABLE WATER VALUES IN PLACE (NEAR
90TH PERCENTILE), HOURLY RAINFALL RATES COULD APPROACH 0.5" WITH
THE STRONGEST STORMS. A LOCALIZED FLOODING THREAT NEAR BURN
SCARS, BUT RATES GENERALLY APPEAR TO BE BELOW SIGNIFICANT
THRESHOLDS. THIS ACTIVITY WILL CONTINUE SHIFTING EASTWARD INTO
SUNDAY EVENING, PERSISTING OVER THE IDAHO MOUNTAINS INTO THE
LATE EVENING HOURS AS THE PARENT SYSTEM STALLS. A QUIETER DAY IS
IN STORE FOR MONDAY, WITH TEMPERATURES IN THE LOW 70S.
LONG TERM...TUESDAY THROUGH SATURDAY
AS THE LOW PRESSURE
SHIFTS EAST, A RIDGE BUILDS OVER THE AREA AND LASTS THROUGH
THURSDAY. DURING THIS PERIOD, THE AREA WILL SEE MOSTLY SUNNY
SKIES AND A RETURN TO NEAR-NORMAL TEMPERATURES. WEDNESDAY
TEMPERATURES RISE TO 5 DEGREES ABOVE NORMAL BEFORE A WEATHER
CHANGE THURSDAY. A COMPLEX SYNOPTIC PATTERN SETS IN THURSDAY,
WITH A TROUGH AXIS EXTENDING OVER THE WEST COAST, WITH POSSIBLY
TWO CLOSED LOWS TO THE NORTH AND SOUTH OF OUR AREA. MODELS
DISAGREE ON THE EXACT POSITION, BUT COOLER WEATHER WITH
INCREASING CLOUDS AND A SLIGHT CHANCE OF SHOWERS FRIDAY AND
SATURDAY IS IN STORE. TEMPERATURES COOL BACK DOWN TO NEAR NORMAL
THURSDAY THROUGH SATURDAY.
AVIATION
ISOLATED WEAK SHOWERS AND THUNDERSTORMS IN CENTRAL
AND S-CENTRAL ID MTNS. OTHERWISE GENERALLY VFR. SURFACE WINDS:
W-NW 5-15 KT THIS AFTERNOON, GUSTY NEAR SHOWERS. WINDS ALOFT AT
10KFT MSL:
W 5-15 KT.
KBOI...VFR. LIGHT SE WINDS THIS MORNING, BECOMING NW 5-10 KT
THIS AFTERNOON.
SUNDAY OUTLOOK...SCATTERED SHOWERS AND THUNDERSTORMS SUNDAY
MORNING THROUGH EVENING. STORMS MAY BRING MVFR/IFR CONDITIONS,
MOUNTAIN OBSCURATION, GUSTY OUTFLOW WINDS UP TO 45 KT, SMALL
HAIL, AND HEAVY RAIN. SURFACE WINDS SE-SW 5-15 KT IN THE
MORNING, BECOMING W-NW 10-20 KT IN THE AFTERNOON AND EVENING.
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...JR
LONG TERM....JM
AVIATION.....JM
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page