476
FXUS65 KBOI 030525
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1125 PM MDT THU APR 2 2026
UPDATE
UPDATED AVIATION DISCUSSION, KEY MESSAGES AND
HAZARDS.
KEY MESSAGES
- ISOLATED MOUNTAIN SNOW SHOWERS CONTINUING OVERNIGHT WITH LIGHT
ACCUMULATIONS.
- WIND GUSTS UP TO 20-30 MPH IN OPEN AREAS AND RIDGES WEAKEN
TONIGHT
- WARMING AND DRYING TREND FRIDAY INTO EARLY NEXT WEEK
SHORT TERM /THROUGH SATURDAY NIGHT/
ISSUED 212 PM MDT THU APR 2 2026
A POTENT LOW PRESSURE SYSTEM MOVES EAST TODAY, AS GUSTY WINDS
AND SHOWERS CONTINUE BEHIND LAST NIGHT'S COLD FRONT. WITH SNOW
LEVELS 3000-4000 FT MSL, MOST AREAS WILL SEE SNOWFALL OR
PARTIALLY MELTED FLURRIES, WITH A 15% CHANCE OF THUNDER AND
GRAUPEL/SMALL HAIL. SNOW SHOWERS IN MOUNTAINS WILL BE TERRAIN
DRIVEN, AND COULD CONTINUE TO UP TO 1-2" BEFORE DISSIPATING
LATER THIS AFTERNOON. DUE TO CONTINUED ACCUMULATION, THE WINTER
WEATHER ADVISORY HAS BEEN ALLOWED TO CONTINUE, THOUGH THE ENDING
TIME HAS BEEN MADE EARLIER TO FALL IN LINE WITH SHOWER
DISSIPATION. POST-FRONTAL WINDS ACROSS THE AREA HAVE INCREASED.
IN MOST AREAS, GUSTS ARE 20-30 MPH, BUT IN THE MAGIC VALLEY AND
CAMAS PRAIRIE, GUSTS UP TO 40-45 MPH ARE POSSIBLE. THUS A WIND
ADVISORY HAS BEEN ISSUED IN THESE ZONES, ENDING THIS EVENING AS
WINDS COME DOWN OVER NIGHT. TEMPERATURES ARE ABOUT 10 DEGREES
BELOW NORMAL TODAY, AND WILL BE SUB-FREEZING THROUGHOUT THE
REGION FRIDAY MORNING.
HIGH PRESSURE WILL DEVELOP OVER THE REGION TONIGHT INTO THE
WEEKEND. THE RIDGE WILL BRING A PRONOUNCED DRYING AND WARMING
TREND, WITH TEMPERATURES NEAR NORMAL ON FRIDAY AND 5 DEGREES
ABOVE NORMAL SATURDAY. HOWEVER, DRYING CONDITIONS WILL KEEP
MORNING LOWS BELOW NORMAL AND CHILLY.
LONG TERM /SUNDAY THROUGH THURSDAY/
ISSUED 212 PM MDT THU APR 2 2026
A BUILDING UPPER RIDGE OVER THE WESTERN US WILL BRING A DISTINCT
WARMING AND DRYING TREND SUNDAY. TEMPERATURES WILL BE APPROXIMATELY
15 DEGREES ABOVE AVERAGE SUNDAY THROUGH TUESDAY, WITH HIGHS IN THE
LOW-MID 70S COMMON THROUGHOUT THE LOWER ELEVATIONS. THE FIRST
MEANINGFUL SHOT OF PRECIPITATION WILL OCCUR LATE WEDNESDAY INTO
THURSDAY, AS A SHORTWAVE TROUGH DIGS OVER THE PACIFIC NORTHWEST,
AHEAD OF A STREAM OF MOISTURE EMANATING OFF THE CALIFORNIA COAST.
NBM GUIDANCE AND THE OFFICIAL FORECAST DON'T QUITE REFLECT THE
POTENTIAL FOR RAINFALL DURING THIS PERIOD AS MUCH AS SOME
DETERMINISTIC MODELS, INCLUDING THE ECMWF-AIFS AND AIGFS 12Z RUNS
WHICH SHOW 0.1-0.5" OF TOTAL QPF. CURRENTLY, THE PROBABILITIES OF
THOSE AMOUNTS OCCURRING ARE ROUGHLY 15%. REGARDLESS, COOLER
TEMPERATURES CLOSER TO NORMAL ARE LIKELY DURING THIS PERIOD, WHILE
WINDS REFLECT TYPICAL AFTERNOON BREEZINESS.
AVIATION /06Z FRIDAY THROUGH SATURDAY/
ISSUED 1121 PM MDT THU APR 2 2026
GENERALLY VFR. LOCALIZED IFR-LIFR IN PATCHY VALLEY FOG IN SHELTERED
MOUNTAIN VALLEYS THROUGH FRIDAY MORNING. MOUNTAINS OBSCURED IN FOG
AND LOW CLOUDS. SURFACE WINDS: VARIABLE LESS THAN 10 KT. WINDS ALOFT
AT 10KFT MSL: W-NW 25-35 KT.
KBOI...VFR. CLEARING OVERNIGHT WITH LOW CLOUDS AND PATCHY FOG NEAR
THE FOOTHILLS. LOW CONFIDENCE (30% CHANCE) IN BRIEF MVFR/IFR
CEILINGS EARLY FRIDAY MORNING. SURFACE WINDS: VARIABLE LESS THAN 6
KT.
WEEKEND OUTLOOK...GENERALLY VFR WITH WARMING AND DRYING CONDITIONS
THIS WEEKEND. LOCALIZED IFR-LIFR CONDITIONS AND MOUNTAIN OBSCURATION
EACH MORNING WITH PATCHY FOG IN SHELTERED MOUNTAIN VALLEYS. SURFACE
WINDS: SW-SE UNDER 10 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
AVIATION.....MC
SHORT TERM...JM
LONG TERM....JR
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