574
FXUS65 KBOI 031119
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
419 AM MST TUE MAR 3 2026
KEY MESSAGES
- A STRONG COLD FRONT ARRIVES LATE WEDNESDAY WITH WIDESPREAD
RAIN AND MOUNTAIN SNOW ABOVE 6000 FEET.
- GUSTY WINDS AND MUCH COOLER TEMPERATURES FOLLOW THE FRONT ON
THURSDAY WITH GUSTS UP TO 45 MPH IN THE SNAKE PLAIN.
AVIATION /12Z TUESDAY THROUGH WEDNESDAY/
ISSUED 419 AM MST TUE MAR 3 2026
AREAS OF FOG/LOW STRATUS THIS MORNING RESULTING IN MVFR/LIFR
CONDITIONS AND MTN OBSCURATION. CONDITIONS IMPROVING TO VFR
UNDER INCREASING HIGH CLOUDS AFTER TUE/16Z. SURFACE WINDS: LIGHT
AND VARIABLE, BECOMING S-E 5-15 BY TUE/PM. WINDS ALOFT AT 10KFT
MSL: VARIABLE 5-15 KT.
KBOI...FOG DEVELOPING IN THE VICINITY, ALTHOUGH LOW CONFIDENCE
IN ANY IMPACTS AT THE TERMINAL THIS MORNING. OTHERWISE VFR UNDER
INCREASING HIGH CLOUDS. SURFACE WINDS: BECOMING SE 5-15 KT.
SHORT TERM /THROUGH THURSDAY NIGHT/
ISSUED 303 AM MST TUE MAR 3 2026
MOSTLY CLEAR SKIES THIS MORNING EXCEPT FOR VALLEY FOG AND LOW
STRATUS ACROSS SOUTH- CENTRAL IDAHO AND MOUNTAIN VALLEYS OF THE
CENTRAL IDAHO MOUNTAINS. EXPECT PATCHY FOG FROM ONTARIO THROUGH
THE TREASURE VALLEY INTO THE WESTERN MAGIC VALLEY DURING THE
MORNING COMMUTE. AN UPPER LEVEL RIDGE BUILDS INLAND FROM THE
PACIFIC ON TUESDAY, BRINGING A MOSTLY SUNNY DAY. HIGH
TEMPERATURES WILL REACH THE LOWER 60S IN THE SOUTHERN VALLEYS
AND UPPER 40S TO 50S ELSEWHERE, WHICH IS ABOUT 5 TO 10 DEGREES
ABOVE NORMAL AND MORE TYPICAL FOR MID-APRIL.
THE NEXT PACIFIC TROUGH IS EXPECTED TO CROSS THE FORECAST AREA
ON WEDNESDAY BRINGING BRIEF BUT WIDESPREAD PRECIPITATION AND A
STRONG COLD FRONT. TOTAL PRECIPITATION THROUGH WEDNESDAY NIGHT
IS EXPECTED TO BE BETWEEN 0.25 AND 0.50 INCH. SNOW LEVELS WILL
STAY ABOVE 6000 FEET FOR MOST OF THE EVENT BEFORE DROPPING
BEHIND THE FRONT LATER ON WEDNESDAY. ABOUT AN INCH OF SNOW IS
POSSIBLE FOR THE LONG VALLEY, WITH AREAS ABOVE 6000 FEET SEEING
BETWEEN 3 TO 6 INCHES IN THE WEST CENTRAL AND BOISE MOUNTAINS.
THERE IS A SLIGHT CHANCE (20 PERCENT) FOR LIGHTNING TO ACCOMPANY
THE STRONGER SHOWERS ALONG THE FRONT.
GUSTY WEST TO NORTHWEST WINDS ARE LIKELY (70 PERCENT) BEHIND THE
TROUGH PASSAGE ON THURSDAY, WITH GUSTS REACHING 40 TO 50 MPH
ACROSS THE SNAKE PLAIN AND HIGHER TERRAIN. A WIND ADVISORY MAY
BE NEEDED FROM MOUNTAIN HOME THROUGH THE WESTERN MAGIC VALLEY,
CAMAS PRAIRIE, AND THE SOUTHWEST HIGHLANDS THURSDAY AFTERNOON.
TEMPERATURES WILL DROP SIGNIFICANTLY, SETTLING AT OR SLIGHTLY
BELOW NORMAL FOR EARLY MARCH. NORTHWEST FLOW ALOFT WILL MAINTAIN
A 40 PERCENT CHANCE OF PRECIPITATION FOR THE MOUNTAINS THROUGH
THURSDAY NIGHT.
LONG TERM /FRIDAY THROUGH TUESDAY/
ISSUED 303 AM MST TUE MAR 3 2026
WINDS WILL BEGIN TO TAPER DOWN COME FRIDAY, BUT REMAIN GUSTY IN
THE TYPICAL AREAS OF THE SNAKE RIVER PLAIN (BETWEEN BOISE AND
MOUNTAIN HOME). IN THIS AREA, THERE IS A 30-70% CHANCE OF SEEING
WIND GUSTS OF 30+ MPH COME FRIDAY AFTERNOON. SHOWERS WILL
PERSIST THROUGH FRIDAY ACROSS TERRAIN AS THE TROUGH EXITS OUR
AREA. A WARMING TREND WILL SET IN THROUGH SUNDAY AS A CLOSED LOW
SETS UP NEAR THE BAJA PENINSULA AND RIDGING AMPLIFIES OVER THE
PACIFIC. CHANCES OF PRECIPITATION WILL REMAIN ELEVATED (20-40%)
ACROSS OUR NORTHERN MOUNTAIN ZONES DUE TO THE POLAR JET SETTING
UP JUST TO OUR NORTH. SUNDAY LOOKS TO BE THE WARMEST DAY WITHIN
THE PERIOD, WITH TEMPERATURES 5-10 DEGREES ABOVE NORMAL DESPITE
INCREASING CLOUD COVER.
MONDAY INTO TUESDAY, GUIDANCE IS IN GOOD AGREEMENT OF A COLD FRONT
MAKING IT'S WAY ACROSS OUR AREA. MOISTURE AVAILABILITY IS
QUESTIONABLE WITH THIS NEXT SYSTEM, WITH MOISTURE BEING DIRECTED
OVER THE NORTH CASCADES BEFORE MAKING IT INTO OUR AREA. HOWEVER,
PRECIPITATION CHANCES WILL INCREASE MONDAY/TUESDAY OVER HIGHER
TERRAIN NORTH AND EAST OF THE SNAKE RIVER PLAIN WHERE OROGRAPHIC
ENHANCEMENT WILL AID IN PRECIPITATION PRODUCTION. GUSTY WINDS WILL
RETURN MONDAY/TUESDAY WITH THIS FRONT, ALONG WITH TEMPERATURE
COOLING TO AT OR A LITTLE BELOW NORMAL COME TUESDAY.
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.....NF
SHORT TERM...JDS
LONG TERM....NF
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