770
FXUS65 KBOI 270020
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
620 PM MDT MON OCT 26 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- A COLD FRONT WITH SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS
WILL MOVE EAST OF THE AREA EARLY THIS EVENING.
- SHOWERS CONTINUE IN THE MOUNTAINS TONIGHT THROUGH EARLY
TUESDAY WITH A LIGHT DUSTING OF SNOW EXPECTED ABOVE 6000 FEET
ELEVATION.
- GRADUAL CLEARING BY LATE TUESDAY WITH TEMPERATURES SEVERAL
DEGREES BELOW NORMAL IN THE COOLER AIR BEHIND THE FRONT
THROUGH WEDNESDAY.
- NEXT BEST CHANCE OF WIDESPREAD PRECIPITATION THIS WEEKEND.
SHORT TERM /THROUGH WEDNESDAY NIGHT/
ISSUED 154 PM MDT MON OCT 26 2026
ISOLATED THUNDERSTORMS ALONG A COLD FRONT MOVING WEST TO EAST
THROUGH SOUTHWESTERN IDAHO WILL TAPER OFF EARLY THIS EVENING IN
MOST AREAS. HOWEVER SHOWER ACTIVITY WILL CONTINUE IN THE CENTRAL
IDAHO MOUNTAINS TONIGHT, SNOW LEVELS WILL LOWER BEHIND THE
FRONT AND A LIGHT DUSTING OF SNOW WILL OCCUR IN THE MOUNTAINS
ABOVE 6000 FEET BY TUESDAY MORNING. GRADUAL CLEARING WILL OCCUR
ON TUESDAY WITH TEMPERATURES EXPECTED TO BE BE A FEW DEGREES
BELOW NORMAL IN THE COOLER AIR BEHIND THE FRONT THROUGH
WEDNESDAY.
LONG TERM /THURSDAY THROUGH MONDAY/
ISSUED 154 PM MDT MON OCT 26 2026
THURSDAY AS UPPER FLOW BACKS FROM WESTERLY TO SOUTHWESTERLY
AHEAD OF THE NEXT DEEP UPPER LOW OFF THE WA COAST. SHOWERS
DEVELOPING THURSDAY NIGHT AS THE LOW COMES INLAND. SURFACE COLD
FRONT AND WIDESPREAD SHOWERS IN WESTERN ID FRIDAY, ALONG WITH
LOWERING SNOW LEVEL. PARTIAL CLEARING AND COLDER FRIDAY NIGHT,
THEN RAIN AND SNOW SHOWERS AGAIN SATURDAY AS THE UPPER LOW COMES
IN. CLEARING, WINDY, AND COLD MONDAY UNDER STRONG NORTHWEST
FLOW ALOFT BEHIND THE EASTWARD-EXITING UPPER LOW.
AVIATION /00Z TUESDAY THROUGH WEDNESDAY/
ISSUED 554 PM MDT MON OCT 26 2026
GENERALLY VFR. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS,
DECREASING FROM W TO E TONIGHT. LOW VFR OR MVFR IN CLOUDS AND
PRECIPITATION, EXCEPT IFR IN SNOW. SNOW LEVEL: 5.5-6.5KFT MSL.
MTNS OBSCURED. PATCHY FOG AND AREAS OF LOW STRATUS OVERNIGHT.
SURFACE WINDS: VARIABLE 5-15 KT. GUSTS TO 15-30 KT WITH SHOWERS
THIS EVENING. WINDS ALOFT AT 10KFT MSL: W-SW 15-25 KT.
KBOI...SHOWERS AND A 10% CHANCE OF LIGHTNING UNTIL APPROXIMATELY
TUE/01Z. SURFACE WINDS: VARIABLE 10-15 KT WITH SHOWER ACTIVITY,
THEN SE 3-8 KT OVERNIGHT.
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...JB
LONG TERM....LC
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