114
FXUS65 KBOI 022012
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
212 PM MDT THU APR 2 2026
KEY MESSAGES
- MOUNTAIN SNOW SHOWERS BRINGING 1-2" OF SNOWFALL THROUGH THIS
EVENING
- WIND GUSTS UP TO 30-45 MPH IN OPEN AREAS AND RIDGES WEAKEN
TONIGHT
- WARMING AND DRYING TREND FRIDAY INTO EARLY NEXT WEEK
SHORT TERM /THROUGH SATURDAY NIGHT/
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/
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 /18Z THURSDAY THROUGH FRIDAY/
ISSUED 1124 AM MDT THU APR 2 2026
SCATTERED RAIN/SNOW SHOWERS WITH GUSTY WINDS THROUGH EARLY
THU EVENING. ISOLATED THUNDERSTORMS DEVELOP BETWEEN 20-01Z WITH
SMALL HAIL/GRAUPEL OVER SOUTHWEST IDAHO. BRIEF MVFR-IFR
CONDITIONS IN HEAVIER SHOWERS. MOUNTAINS OBSCURED. PRECIPITATION
ENDS EARLY FRIDAY MORNING FROM WEST TO EAST WITH IMPROVING
CEILINGS AND WEAKENING WINDS. SURFACE WINDS: WNW 15-25 KT WITH
GUSTS 35-45 KT IN SOUTHEAST OREGON AND SOUTHERN IDAHO. WNW 10-20
KT WITH GUSTS TO 30 KT ELSEWHERE. BECOMING W LESS THAN 10 KT
EARLY FRIDAY MORNING.
KBOI...MAINLY VFR WITH BRIEF MVFR. SCATTERED INTERMITTENT
RAIN/SNOW SHOWERS THROUGH 02Z. ISOLATED THUNDERSTORMS DEVELOP
BETWEEN 22-01Z WITH A 30% CHANCE OF IMPACTING THE TERMINAL.
GRAUPEL AND BRIEF VARIABLE/GUSTY WINDS WITH ANY THUNDERSTORM.
CONDITIONS IMPROVE EARLY FRIDAY MORNING. WINDS WILL BE WNW 10-20
WITH GUSTS TO 30 KT THROUGH LATE EVENING, BEFORE WEAKENING
EARLY FRIDAY MORNING. VFR CONDITIONS FRIDAY.
WEEKEND OUTLOOK...BUILDING HIGH PRESSURE WILL BRING A DRY AND
CLEAR WEEKEND, WITH WINDS SW-SE UNDER 10 KT THROUGH
SATURDAY/SUNDAY. PATCHY FOG POSSIBLE IN SHELTERED MOUNTAIN
VALLEYS SATURDAY MORNING.
BOI WATCHES/WARNINGS/ADVISORIES
ID...WINTER WEATHER ADVISORY UNTIL 6 PM MDT THIS EVENING FOR IDZ011.
WINTER WEATHER ADVISORY FROM 9 PM THIS EVENING TO 6 AM MDT
FRIDAY FOR IDZ011.
WIND ADVISORY UNTIL 9 PM MDT THIS EVENING FOR IDZ016-028-030.
OR...NONE.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
SHORT TERM...JM
LONG TERM....JR
AVIATION.....JR
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