489
FXUS65 KBOI 280406
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
906 PM MST FRI FEB 27 2026
DISCUSSION
DRY, MOSTLY CLEAR, AND COLD CONDITIONS WILL
RETURN FOR THE REGION TONIGHT. ABOVE NORMAL TEMPERATURES WILL
CONTINUE THROUGH SUNDAY THANKS TO A BUILDING RIDGE OF HIGH
PRESSURE. EARLY MORNING LOW TEMPERATURES TONIGHT WILL BE
SLIGHTLY WARMER THAN THIS MORNING, ESPECIALLY IN MOUNTAIN
VALLEYS. A LOW PRESSURE SYSTEM IS STILL ON TRACK TO BRING
PRECIPITATION AND COOLER TEMPERATURES TOMORROW EVENING INTO
SUNDAY. AFTERNOON THUNDERSTORMS ARE POSSIBLE (<20% CHANCE) NEAR
THE NEVADA BORDER. NO UPDATES NEEDED TO THE FORECAST.
AVIATION
VFR. SHOWERS ARRIVING IN SE OREGON/SW IDAHO FROM NEVADA
SATURDAY AFTERNOON, CREATING LOCAL MVFR CEILINGS AND MOUNTAIN
OBSCURATION. SNOW LEVELS: 7000-8500 FT MSL DURING SHOWER ACTIVITY. A
15% CHANCE OF AFTERNOON LIGHTNING IN S HARNEY COUNTY. SURFACE WINDS:
VARIABLE 5-15 KT. WINDS ALOFT AT 10KFT MSL: WESTERLY 10-30 KT.
KBOI...VFR. SE UP TO 8 KT, THEN LIGHT AND VARIABLE SATURDAY
AFTERNOON.
SUNDAY OUTLOOK...SHOWERS EXPANDING NORTHWARD SUNDAY. A 15% CHANCE OF
LIGHTNING NEAR NV BORDER. MVFR-IFR DEVELOPING IN MTN SNOW AND
HEAVIER RAIN SHOWERS. MTNS OBSCURED. SNOW LEVELS: 6-8KFT MSL, LOWER
FOR NORTH. SURFACE WINDS: SW-SE 5-15 KT, GUSTS UP TO 30 KT WITH
STORMS.
PREV DISCUSSION
SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT...HIGH CLOUDS WILL
CONTINUE TO HUG THE NV BORDER OVERNIGHT, WITH MOSTLY CLEAR SKIES
TO THE NORTH. AN UPPER LOW APPROACHING THE NORTHERN CA COAST WILL
PUSH CLOUDS FURTHER NORTH ON SATURDAY. LIGHT PRECIPITATION WILL
BREAK OUT ALONG A WARM FRONT LATE SATURDAY INTO SUNDAY. THE
FRONT WILL WEAKEN AS IT LIFTS NORTH RESULTING IN LIQUID TOTALS
LESS THAN 0.10 INCHES FOR MOST SPOTS FROM THE SNAKE PLAIN INTO
THE BOISE AND WEST-CENTRAL IDAHO MOUNTAINS. AREAS TO THE SOUTH
AND WEST WILL SEE HIGHER AMOUNTS WITH A RANGE OF 0.1-0.3 INCHES
THROUGH SUNDAY NIGHT. SNOW LEVELS WILL RISE TO BETWEEN 6-8KFT
MSL BY SUNDAY AFTERNOON. SNOW ACCUMULATION WILL BE LESS THAN AN
INCH AT ALL BUT THE HIGHEST ELEVATIONS IN THE STEENS. SOUTHERN
AREAS ALONG THE NV BORDER WILL SEE AN UPTICK IN THE CHANCE OF
THUNDERSTORMS SAT/SUN AFTERNOON. FOR NOW THE NBM KEEPS THE
THREAT AT LESS THAN 15%, THOUGH SOME HIGH RESOLUTION MODELS ARE
SHOWING SIGNS OF T-STORM DEVELOPMENT ACROSS SE OREGON SAT/SAT
NIGHT, SPREADING EASTWARD ALONG THE ID/NV BORDER ON SUNDAY.
TEMPERATURES WILL REMAIN 5-10 DEGREES ABOVE NORMAL THROUGH THE
WEEKEND.
LONG TERM...MONDAY THROUGH FRIDAY...PRECIPITATION CHANCES FROM
THE UPPER-LEVEL TROUGH WILL LINGER INTO MONDAY AS THE SYSTEM
MOVES FURTHER EAST INTO THE GREAT BASIN. SNOW LEVELS WILL REMAIN
HIGH WITH VALUES RANGING FROM 6000-7500 FEET MSL. BRIEF UPPER-
LEVEL RIDGING BUILDS IN TUESDAY BEFORE ANOTHER UPPER-LEVEL
TROUGH MOVES ACROSS THE PACIFIC NW. TEMPERATURES TUESDAY WILL BE
THE WARMEST OF THE PERIOD, WITH LOW 60S ACROSS PARTS THE SNAKE
BASIN. ENSEMBLES BRING A POTENT COLD FRONT THROUGH THE AREA ON
WEDNESDAY AFTERNOON, WITH SNOW LEVELS FALLING TO 3500-4500 FEET
MSL BY THURSDAY. SNOW SHOWERS CONTINUE OVER THE HIGHER TERRAIN
THURSDAY WITH THE COLD UNSTABLE AIR ALOFT. CONDITIONS DRY OUT ON
FRIDAY BETWEEN SYSTEMS. A RETURN TO COOL AND UNSETTLED BY THE
FOLLOWING WEEKEND.
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
DISCUSSION...SA
AVIATION.....SH
SHORT TERM...DG
LONG TERM....CH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page