282
FXUS65 KBOI 260255
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
855 PM MDT SAT OCT 25 2025
DISCUSSION
A WELL-DEFINED COLD FRONT CONTINUES TO PUSH EAST
ACROSS SOUTHWEST IDAHO THIS EVENING. THIS HAS BEEN THE DRIVER
FOR THE STRONG THUNDERSTORMS, WHICH WILL CONTINUE AS THE FRONT
MOVES EASTWARD. THE FRONT PRODUCED SEVERAL STRONGER
THUNDERSTORMS EARLIER THIS EVENING, WITH REPORTED GUSTS OF 59
MPH AT ONTARIO AND 56 MPH AT MCCALL. SMALL HAIL WAS ALSO
REPORTED WITH WEB CAMS SHOWING PARTS OF US 95 AND ID 55 COVERED
IN HAIL. SEVERAL POWER OUTAGES HAVE BEEN REPORTED FROM ONTARIO
AND PAYETTE THROUGH HORSE BEND AND PLACERVILLE. MCCALL SET A
RECORD 1.24 INCHES OF RAINFALL SO FAR TODAY. A MORE
COMPREHENSIVE REPORT (LSRBOI) OF THIS STORM SYSTEM WILL BE
ISSUED LATER THIS EVENING.
THE FRONT WILL CONTINUE TO MOVE EASTWARD TONIGHT AND SHOULD
LARGELY EXIT THE REGION BY MIDNIGHT. THE WESTERN MAGIC VALLEY
WEST ALONG THE IDAHO NEVADA BORDER WILL BE THE EXCEPTION, WHERE
THE FRONTAL BOUNDARY WILL BECOME MORE STATIONARY OVERNIGHT. THIS
WILL KEEP THE THREAT FOR SHOWERS GOING INTO EARLY SUNDAY
MORNING. A SECOND SYSTEM WILL MOVE INLAND SUNDAY AFTERNOON AND
BEGIN TO SPREAD WIDESPREAD PRECIPITATION AHEAD OF ANOTHER COLD
FRONT. SNOW LEVEL ACROSS THE NORTH WILL START OUT AROUND 4000
FEET AND AROUND 5000 FEET ALONG THE NEVADA BORDER SUNDAY
AFTERNOON, WITH ACCUMULATING SNOW AS LOW AS 4500 FEET.
THE GREATEST POTENTIAL FOR SNOW WILL OCCUR WITH THE FRONTAL
PASSAGE LATE SUNDAY NIGHT WHERE 1 TO 3 INCHES IS POSSIBLE FOR
THE LONG VALLEY AND UP TO 6 TO 10 INCHES AT BANNER SUMMIT.
CURRENT GUIDANCE HAS THIS COVERED WELL, SO NO UPDATE NEEDED AT
THIS TIME.
AVIATION
SCATTERED SHOWERS/THUNDERSTORMS TONIGHT WITH COLD FRONT,
PRODUCING 25-45KT GUSTS, SMALL HAIL, LOW VFR TO IFR CONDITIONS.
THEN, PRECIP EXPANDING INTO EAST OR AND SOUTHWEST ID FROM THE SOUTH
AND WEST, SUN MORNING THRU EVE. MTNS OBSCURED. SNOW LEVELS 5000-6000
FEET MSL LOWERING TO 3500-4500 FEET SUN MORNING. IFR TO LIFR IN MTN
SNOW AND LOW CLOUDS. LOW VFR TO IFR IN VALLEY RAIN. SURFACE WINDS:
SE-SW 5-15KT. GUSTS TO 25-45KT TONIGHT DUE TO FRONT/STORMS. WINDS
ALOFT AT 10KFT MSL: SW-W 25-45KT.
KBOI...PERIODS OF RAIN SHOWERS BEFORE SUN/06Z. RAIN RETURNING AROUND
SUN/19Z-21Z, CONTINUING THROUGH MON/04Z-06Z. PERIODS OF LOW VFR/MVFR
IN RAIN. FOOTHILLS OBSCURED AT TIMES. SURFACE WINDS SW-SE UP TO 10KT
OVERNIGHT, THEN SE-S 10-15KT WITH 20-25KT GUSTS AFTER SUN/18Z.
PREV DISCUSSION
SHORT TERM...TONIGHT THROUGH MONDAY NIGHT...
FRONTAL BAND OF SHOWERS/THUNDERSTORMS WILL QUICKLY MOVE EASTWARD
TONIGHT ACROSS WESTERN/CENTRAL IDAHO, BRINGING STRONG WIND GUSTS
OF 40-50 MPH, WITH SOME LOCALLY STRONGER. IN THE WAKE OF THE
COLD FRONT, SNOW LEVELS WILL DROP TO BELOW 5000 FEET OVERNIGHT,
RESULTING IN LIGHT TO MODERATE SNOW IN THE IDAHO MOUNTAINS. A
STRONG JET ALOFT WILL BE MAINTAINED ACROSS SOUTHERN IDAHO INTO
SUNDAY, AND PROVIDE ENOUGH ASCENT FOR CONTINUED PRECIPITATION
CHANCES EARLY SUNDAY MORNING (30-50%) NEAR THE NEVADA BORDER,
BEFORE MORE WIDESPREAD PRECIPITATION REDEVELOPS LATER SUNDAY
AFTERNOON. SNOW ACCUMULATIONS THROUGH LATE SUNDAY WILL GENERALLY
RANGE BETWEEN 2-8 INCHES ABOVE 5000 FEET IN THE BOISE AND WEST-
CENTRAL MOUNTAINS, WITH LITTLE TO NO ACCUMULATION BETWEEN
4000-5000 FEET. TOTAL QPF AMOUNTS ARE LIKELY TO EXCEED ONE INCH
ACROSS MANY OF THE CENTRAL/WEST-CENTRAL IDAHO MOUNTAINS, AND
GENERALLY RANGE BETWEEN 0.25-0.5 INCH ELSEWHERE. DRIER AND
COOLER CONDITIONS TAKE HOLD ON MONDAY, WITH HIGHS STRUGGLING TO
GET ABOVE 50 DEGREES, AND OVERNIGHT TEMPERATURES CLOSE TO THE
FREEZING MARK IN MANY AREAS. PATCHY OVERNIGHT FOG WILL ALSO BE
POSSIBLE IN THE MOUNTAIN VALLEYS OF IDAHO.
LONG TERM...TUESDAY THROUGH SATURDAY...
TUESDAY MORNING WILL START OFF COLD, WITH NEARLY EVERY LOCATION
IN THE AREA AT OR BELOW THE FREEZING MARK FOR LOW TEMPERATURES.
THESE CONDITIONS WILL BE SHORT-LIVED AS A MODEST WARMING TREND
OCCURS MID-WEEK AMIDST BROAD UPPER-LEVEL RIDGING. DRY CONDITIONS
WILL PREVAIL THROUGH MOST OF THE WEEK, WITH EXCEPTION TO A WEAK
SYSTEM PASSING TO THE NORTH ON WEDNESDAY BRINGING A SLIGHT
CHANCE OF PRECIPITATION TO WEST-CENTRAL IDAHO AND NORTHEAST
OREGON. THE SIGNAL IS INCREASING FOR ANOTHER STORM SYSTEM
MOVING IN FROM THE NORTH FRIDAY AND SATURDAY, PRIMARILY
AFFECTING AREAS NORTH OF THE SNAKE PLAIN.
PRELIMINARY POINT TEMPS/POPS
BAKER CITY 24 49 22 47 / 40 60 70 10
BOISE 39 52 34 50 / 90 50 70 0
BURNS 22 46 17 47 / 20 70 40 0
CALDWELL 37 53 32 53 / 90 60 60 0
FAIRFIELD 23 43 21 42 / 90 60 80 0
IDAHO CITY 25 48 21 46 / 100 60 90 10
JEROME 38 44 32 44 / 80 60 70 0
MCCALL 26 40 22 38 / 100 60 100 20
MOUNTAIN HOME 36 51 32 51 / 90 50 60 0
ONTARIO 35 53 31 52 / 60 50 60 0
ROME 31 50 26 50 / 70 70 40 0
TWIN FALLS 37 45 32 44 / 80 70 70 10
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
DISCUSSION...JDS
AVIATION.....SH
SHORT TERM...JR
LONG TERM....JR
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page