010
FXUS65 KBOI 150529
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1129 PM MDT TUE APR 14 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- RAIN, MOUNTAIN SNOW AND GUSTY WINDS ON WEDNESDAY, THEN SNOW
LEVEL LOWERING TO VALLEY FLOORS THURSDAY MORNING.
- SUBFREEZING MORNING TEMPERATURES THURSDAY THROUGH SATURDAY
ACROSS THE ENTIRE AREA.
- WARMER TEMPERATURES OVER THE WEEKEND WITH ANOTHER CHANCE OF
PRECIPITATION EARLY NEXT WEEK.
SHORT TERM /THROUGH THURSDAY NIGHT/
ISSUED 232 PM MDT TUE APR 14 2026
AN UPPER TROUGH DROPPING SOUTH ALONG THE BC COAST WILL PUSH
INTO THE REGION LATER TONIGHT BRINGING VALLEY RAIN AND MOUNTAIN
SNOW. PRECIPITATION WILL DEVELOP ACROSS SE OREGON BY LATE THIS
EVENING, SPREADING INTO SW IDAHO OVERNIGHT. SNOW LEVELS OF
5000-6500 FEET WILL SUPPORT SNOW OR A RAIN/SNOW MIX ACROSS
MOUNTAIN VALLEY FLOORS WITH ANY MINOR ACCUMULATION MELTING OFF
BY LATE MORNING. PRECIPITATION MIXES WITH OR CHANGES TO RAIN
BELOW 6000 FEET WITH A HEAVY, WET SNOW CONTINUING IN THE HIGHER
MOUNTAINS THROUGH WEDNESDAY EVENING. LIQUID EQUIVALENT TOTALS
OVER THE MOUNTAINS IS 0.75-1.5" OVER THE 24H PERIOD FROM LATE
THIS EVENING THROUGH WEDNESDAY EVENING. ABOVE 6500 FEET THIS
WILL TRANSLATE TO 10-20" OF SNOW, WITH HIGH END AMOUNTS OF UP
TO 2 FEET.
LOWER ELEVATIONS WILL SEE PERIODS OF RAIN ON WEDNESDAY. BY LATE
MORNING STRONG SOUTHWEST FLOW ALOFT (30-50 MPH AT ~10KFT) WILL
MIX TO THE SURFACE BRINGING GUSTY WINDS TO HIGHER TERRAIN
OUTSIDE OF THE SNAKE PLAIN. THE WINDIEST LOCATIONS WILL BE
SOUTHERN HARNEY, MALHUER, AND OWYHEE COUNTIES WHERE GUSTS OF
40-45 MPH ARE EXPECTED. A COLD FRONT WILL PUSH INTO THE REGION
WEDNESDAY EVENING BRINGING A CHANCE OF THUNDERSTORMS, MORE GUSTY
WINDS AND LOWER SNOW LEVELS. AREAS THAT DON'T TAP INTO THE
STRONGER WINDS DURING THE DAY, WILL SEE A PERIOD OF STRONGER
GUSTS WITH THE FRONTAL PASSAGE. THIS IS MOSTLY IN THE SNAKE
PLAIN AND WEISER BASIN. SNOW LEVELS WILL DROP TO VALLEY FLOORS
BEHIND THE FRONT AS PRECIPITATION SCATTERS OUT. THOUGH IT WILL
REMAIN BREEZY, LOWER ELEVATIONS WILL BRIEFLY FLIRT WITH FREEZING
TEMPERATURES THURSDAY MORNING.
THE UPPER LOW PASSES OVERHEAD ON THURSDAY, KEEPING A CHANCE OF
RAIN/SNOW/GRAUPEL SHOWERS AT LOWER ELEVATIONS WITH SNOW SHOWERS
IN THE MOUNTAINS. DAYTIME INSTABILITY WILL SUPPORT HEAVIER
SHOWERS AND POSSIBLE THUNDERSTORMS IN THE MOUNTAINS WHICH COULD
DROP BRIEF HEAVY SNOW.
THURSDAY NIGHT WILL SEE DRYING CONDITIONS AND CLEARING SKIES AS
THE LOW EXITS EASTWARD. THIS WILL ALLOW FOR A WIDESPREAD FREEZE,
AND FOR MANY LOCATIONS A HARD FREEZE (28 DEGREES OR LESS).
LONG TERM /FRIDAY THROUGH TUESDAY/
ISSUED 232 PM MDT TUE APR 14 2026
STRONG NORTHWEST FLOW FROM THE BACK END OF THE EASTWARD MOVING
TROUGH WILL CONTINUE BREEZY CONDITIONS FRIDAY, WITH ELEVATED
GUSTS UP TO 30 MPH MAINLY OVER MAGIC VALLEY AND CAMAS PRAIRIE.
THE WEST-CENTRAL ID MOUNTAINS WILL SEE A 20-30% CHANCE OF SNOW
SHOWERS FROM REMNANT UPPER MOISTURE ON FRIDAY. NIGHTTIME
TEMPERATURES WILL BE EXPECTED TO STAY ON THE COLDER END, BELOW
FREEZING THROUGH SATURDAY MORNING. OTHERWISE, A WARMING AND
DRYING TREND WILL SETTLE IN FOR THE WEEKEND AS A RIDGE BUILDS IN
FROM THE NORTHWEST COAST. PEAK TEMPERATURES WILL HOVER SLIGHTLY
ABOVE NORMAL ON SATURDAY AND 5-10 DEGREES ABOVE NORMAL ON
SUNDAY.
LONG-RANGE GUIDANCE CONTINUES TO FAVOR ANOTHER LOW DIGGING DOWN FROM
THE GULF OF ALASKA EARLY NEXT WEEK, ALTHOUGH CONSIDERABLE
UNCERTAINTY REMAINS OVER ITS ARRIVAL TIMING FOR OUR AREA. HOWEVER,
ENSEMBLES STILL FAVOR THE LATE SUNDAY/MONDAY TIME FRAME. WITH
THAT, PRECIPITATION CHANCES WILL INCREASE FROM WEST TO EAST
EARLY SUNDAY INTO MONDAY, REACHING 30-60% AREA-WIDE BY MONDAY
AFTERNOON. PRECIPITATION CHANCES WILL REMAIN ELEVATED THROUGH
MIDWEEK. THE SOUTH-SOUTHWEST FLOW FROM THIS SYSTEM WILL KEEP
TEMPERATURES NEAR NORMAL WHEN IT IMPACTS OUR AREA. GUSTY WINDS
CAN BE EXPECTED AHEAD OF AND BEHIND THE SYSTEM PASSAGE.
AVIATION /06Z WEDNESDAY THROUGH THURSDAY/
ISSUED 1129 PM MDT TUE APR 14 2026
VFR THIS EVE. PRECIP NW TO SE TONIGHT INTO WED, WITH SNOW
LEVELS 5K-6KFT MSL. LOW VFR-MVFR IN RAIN, IFR/LIFR IN MTN SNOW.
COLD FRONT ARRIVING LATE WED AFTN/EVE, INTENSIFYING PRECIP
RATES, RAPIDLY LOWERING SNOW LEVELS FROM NW TO SE, AND CREATING
SHARP WIND SHIFTS. MVFR-LIFR CONDITIONS IN HEAVY SHOWERS. A 15%
CHC OF LIGHTNING WITH FRONT. MTNS OBSCURED IN PRECIP/LOW CIGS.
SURFACE WINDS: SE-SW 5-15 KT, INCREASING TO 10-20 KT GUSTS 20-35
KT BEGINNING LATE WED AM. THEN, W-N 15-30 KT WITH 25-45 KT
GUSTS WITH COLD FRONT PASSAGE WED PM. WINDS ALOFT AT 10KFT MSL:
W-SW 25-40 KT.
KBOI...VFR TONIGHT. RAIN SHOWERS RETURNING EARLY WEDNESDAY
MORNING WITH LOWERING CEILINGS. MVFR CHANCES INCREASE AFTER
WED/10Z. STRONG COLD FRONT ARRIVES LATE WED AFTERNOON, BRINGING
STRONG SHOWERS, POTENTIAL FOR GRAUPEL/LIGHTNING, SHARP WIND
SHIFT, AND TEMPORARY MVFR/IFR. SURFACE WINDS: SE OR VARIABLE
3-12 KT. WIND SHIFT AROUND THU/00Z TO NW 15-25 KT WITH GUSTS TO
25-35 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.....SH
SHORT TERM...DG
LONG TERM....JY
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