267
FXUS65 KBOI 222050
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
250 PM MDT WED OCT 22 2025
SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT
AN UPPER LEVEL
RIDGE WILL REMAIN OVER THE AREA THROUGH EARLY FRIDAY, THEN SHIFT
EAST LATE FRIDAY AS A DEEP UPPER LEVEL TROUGH MOVES INTO THE
PACIFIC NORTHWEST. AS A RESULT, DRY CONDITIONS WILL PREVAIL
THROUGH FRIDAY AFTERNOON, WITH A 30-60% CHANCE OF PRECIPITATION
MOVING INTO WESTERN AND NORTHERN AREAS FRIDAY NIGHT.
TEMPERATURES THURSDAY WILL BE SIMILAR TO TODAY, SLIGHTLY ABOVE
NORMAL, AND WINDS WILL BE LIGHT FROM THE WEST TO NORTHWEST. ON
FRIDAY, WINDS WILL SWITCH TO THE SOUTH TO SOUTHEAST AND BECOME
BREEZY AS THE TROUGH APPROACHES. INCREASED SURFACE WINDS AND
DOWNSLOPING, COMBINED WITH WARM SOUTHWEST FLOW ALOFT, WILL
ALLOW HIGHS ON FRIDAY TO REACH THE UPPER 60S TO AROUND 70 IN THE
LOWER ELEVATIONS, OR 5-10 DEGREES ABOVE NORMAL. CLOUDS WILL
INCREASE THROUGH THE DAY FRIDAY AS THE SYSTEM APPROACHES.
LONG TERM...SATURDAY THROUGH WEDNESDAY
AT ATMOSPHERIC RIVER
EVENT WILL BE ONGOING THROUGH THE WEEKEND ACROSS THE AREA. AS
THE UPPER- LEVEL TROUGH AND ASSOCIATED COLD FRONT BRING IN THIS
MOISTURE, WIDESPREAD PRECIPITATION WILL BE ONGOING FROM FRIDAY
NIGHT THROUGH MONDAY NIGHT. THE EVENT WILL START SATURDAY WITH
WARM SOUTHWESTERLY FLOW ALOFT, EVENTUALLY TRANSITIONING TO
NORTHWESTERLY FLOW ALOFT AS THE TROUGH MOVES EAST SUNDAY NIGHT
INTO MONDAY. ALONG WITH A COLD FRONT THAT WILL MOVE THROUGH THE
AREA FRIDAY NIGHT THROUGH EARLY SATURDAY MORNING, WIND GUSTS
WILL BE ELEVATED WITH A STRONG PRESSURE GRADIENT. BEHIND THIS
FRONT WILL BE A COOLER AIR MASS, CAUSING TEMPERATURES TO DROP
10-15 DEGREES. THE COOLEST TEMPERATURES WILL COME MONDAY
NIGHT/TUESDAY MORNING, AFTER A MAJORITY OF THE PRECIPITATION HAS
MOVED OUT WITH A BETTER CHANCE TO RADIATIONALLY COOL THANKS TO
CLEARER SKIES AND WEAKER WINDS. SNOW LEVELS WILL INITIALLY STAY
AROUND 7000-8000 FEET FOR THE HEAVIEST PRECIPITATION, LOWERING
TO 4000-5000 FEET BY MONDAY WITH ANOTHER ROUND OF PRECIPITATION
EXPECTED.
DRIER AND WARMER CONDITIONS RETURN TUESDAY/WEDNESDAY AS AN
UPPER-LEVEL RIDGE LOOKS TO BUILD IN THROUGH THE MID WEEK. AS
ANOTHER UPPER- LEVEL TROUGH LOOKS TO IMPACT THE PACIFIC NW
STARTING WEDNESDAY, THE AREA WILL BE UNDER SOUTHWEST FLOW ALOFT,
KEEPING PRECIPITATION CHANCES FOR HIGHER TERRAIN DURING THIS
TIME.
AVIATION
VFR. HIGH CLOUDS MOVING INTO THE AREA FROM THE
SOUTH. PATCHY FOG OVERNIGHT. SURFACE WINDS: VARIABLE LESS THAN
10 KT. WINDS ALOFT AT 10KFT MSL: W-NW 10-20 KT.
KBOI...VFR. SURFACE WINDS: VARIABLE 4-9 KTS.
PRELIMINARY POINT TEMPS/POPS
BAKER CITY 27 62 30 62 / 0 0 0 0
BOISE 39 63 42 68 / 0 0 0 0
BURNS 23 63 27 67 / 0 0 0 0
CALDWELL 35 64 38 67 / 0 0 0 0
FAIRFIELD 27 62 28 60 / 0 0 0 0
IDAHO CITY 30 64 30 67 / 0 0 0 0
JEROME 37 58 36 62 / 0 0 0 0
MCCALL 29 57 31 60 / 0 0 0 0
MOUNTAIN HOME 35 64 35 68 / 0 0 0 0
ONTARIO 33 64 35 63 / 0 0 0 0
ROME 31 65 33 70 / 0 0 0 0
TWIN FALLS 37 59 35 65 / 0 0 0 0
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...ST
LONG TERM....CH
AVIATION.....CH
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