478
FXUS65 KBOI 090942
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
242 AM MST MON FEB 9 2026
SHORT TERM...TODAY THROUGH WEDNESDAY NIGHT
AS OF 2 AM MST
PCPN HAS GENERALLY ENDED ON THE OR SIDE BUT CONTINUING IN ID
AS A PACIFIC COLD FRONT MOVES THROUGH. INITIAL SHADOWING IN
THE SNAKE BASIN WAS QUICKLY OVERCOME SUNDAY EVENING AND ALL
AREAS RECEIVED PCPN. BY SUNRISE THE FRONTAL PCPN SHOULD BE
ENDING IN SOUTHERN ID, BUT POST-FRONTAL RAIN AND SNOW SHOWERS
WILL CONTINUE THROUGH THE MORNING IN THE BOISE MOUNTAINS AND
SOUTHERN SAWTOOTHS, AND THROUGH THE AFTERNOON IN THE WEST
CENTRAL IDAHO MOUNTAINS. CLOUDS SHOULD DECREASE IN OREGON THIS
MORNING AND IN IDAHO THIS AFTERNOON, WITH MOST AREAS BECOMING
SUNNY BUT BREEZY AND COOLER THAN YESTERDAY. MOSTLY CLEAR SKIES
AND DECREASING WINDS THIS EVENING WILL ALLOW COLDER TEMPS AND
PATCHY FOG IN THE VALLEYS TONIGHT. CLOUDS WILL INCREASE AGAIN
FROM THE SOUTH TOWARD MORNING AS A PACIFIC UPPER LOW MOVES
TOWARD CALIFORNIA AND CIRCULATES MOISTURE NORTHWARD THROUGH
NEVADA. TUESDAY WILL BECOME CLOUDY IN ALL AREAS, WITH LIGHT
RAIN AND SNOW BEGINNING IN SOUTHERN MOUNTAINS LATE IN THE DAY.
LIGHT RAIN AND SNOW WILL SPREAD NORTHWARD THROUGH THE CWA
TUESDAY NIGHT THROUGH WEDNESDAY AS THE CALIFORNIA LOW COMES
INLAND AS A WEAKENING TROUGH. PCPN SHOULD DECREASE IN OR
WEDNESDAY AFTERNOON AND IN ID WEDNESDAY EVENING. TOTAL WATER
EQUIVALENT TUESDAY EVENING THROUGH WEDNESDAY SHOULD BE .15 TO
.30 INCH IN THE MOUNTAINS, .10 TO .20 INCH IN HIGHER VALLEYS AND
BASINS, AND LESS THAN .10 INCH IN THE LOWER VALLEYS. SNOWFALL
WILL BE UP TO 3 INCHES IN THE MOUNTAINS. HIGHER VALLEYS WILL
RECEIVE AN INCH OR LESS OF SNOW, WITH THE SNAKE BASIN GETTING
LITTLE OR NONE.
LONG TERM...THURSDAY THROUGH MONDAY
ACTIVE WEATHER WILL
CONTINUE. TO BEGIN, PRECIPITATION WILL BE WANING FROM THE
PREVIOUS UPPER-LEVEL TROUGH AS IT MOVES EAST OF THE REGION.
BRIEF SHORTWAVE UPPER-LEVEL RIDGING WILL PASS OVERHEAD LATE
THURSDAY INTO FRIDAY, BRINGING DRY CONDITIONS. TEMPERATURES
WILL REMAIN SLIGHTLY ABOVE NORMAL THROUGH FRIDAY.
ANOTHER SYSTEM WILL MOVE IN LATE FRIDAY INTO SUNDAY THANKS TO
AN UPPER-LEVEL LONGWAVE TROUGH DIGGING INTO THE REGION. THIS
WILL SEND COLD AIR SOUTHWARD FROM BRITISH COLUMBIA. HOWEVER,
WE WILL STAY UNDER SOUTHWEST FLOW ALOFT THANKS TO A DEEPENING
UPPER-LEVEL LOW OFF THE OREGON COAST. THIS WILL LIKELY CONTINUE
THE TREND OF SLIGHTLY ABOVE NORMAL TEMPERATURES, WITH SNOW
LEVELS 4000-5000 FEET MSL. SLIGHT SHIFTS IN THIS PATTERN COULD
CHANGE THE FORECAST, WITH SOME DETERMINISTIC MODELS (GFS
PRIMARILY) AND SOME CLUSTERS FAVORING A MORE NORTHERLY TRACK OF
THE TROUGH. THIS WOULD HELP SHIFT SOUTHWEST FLOW TO THE EAST AND
BRING A COLDER AIRMASS TO THE AREA, POTENTIALLY BRINGING SNOW
DOWN TO VALLEY FLOORS. CONFIDENCE IN THIS SOLUTION IS LOW, WITH
THE MORE LIKELY OUTCOME KEEPING RAIN OR A RAIN-SNOW MIX IN MOST
LOWER ELEVATION POPULATION CENTERS THROUGH NEXT WEEKEND.
AVIATION
PRECIPITATION CONTINUING THROUGH EARLY MONDAY MORNING,
BRINGING LOCALIZED MVFR-IFR. AFTER 18Z/MON, PRECIPITATION CHANCES
LARGELY LIMITED TO HIGHER TERRAIN OF CENTRAL ID. SNOW LEVELS 4-5.5
KFT MSL, LOWERING TO 3-4 KFT MSL BY LATE MONDAY MORNING. MTNS
OBSCURED IN PRECIPITATION/LOW CEILINGS. SURFACE WINDS: W-NW 10-15
KT, EXCEPT KTWF/KJER GUSTS 20-30 KT THROUGH MONDAY AFTERNOON. WINDS
ALOFT AT 10KFT MSL: SW-NW 25-40 KT.
KBOI...VFR. SURFACE WINDS: W-NW 10-15 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
SHORT TERM...LC
LONG TERM....CH
AVIATION.....CH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page