942
FXUS65 KBOI 222018
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
218 PM MDT SUN MAR 22 2026
KEY MESSAGES
- WARM, SLIGHTLY ABOVE NORMAL TEMPERATURES AND DRY CONDITIONS WILL
CONTINUE THROUGH THE MIDDLE OF NEXT WEEK.
- ANOTHER COLD FRONT WILL MOVE THROUGH THE REGION MIDWEEK,
BRINGING MOUNTAIN SHOWERS AND SLIGHTLY COOLER TEMPERATURES.
SHORT TERM /THROUGH TUESDAY NIGHT/
A RIDGE OF HIGH PRESSURE WILL CONTINUE TO BUILD BACK OVER THE
REGION THROUGH MONDAY. THIS WILL KEEP A RELATIVELY COOL ZONAL
FLOW MOSTLY TO OUR NORTH. WHILE TONIGHT WILL FEEL NOTICEABLY
COOLER WITH LOWS REACHING NEAR OR BELOW FREEZING IN MANY
LOCATIONS, MONDAY HIGHS WILL REMAIN ABOVE SEASONAL NORMALS.
BY TUESDAY, AN ATMOSPHERIC RIVER ASSOCIATED WITH A LOW PRESSURE
SYSTEM OFF THE BRITISH COLUMBIA COAST WILL BEGIN TO TRANSPORT
MOISTURE TOWARD THE PACIFIC NORTHWEST. THIS SYSTEM WILL ATTEMPT
TO PUSH COLDER AIR AND PRECIPITATION INTO SOUTHEAST OREGON AND
SOUTHWEST IDAHO. HOWEVER, THE PERSISTENT RIDGE TO OUR SOUTH WILL
KEEP MOST OF THE MOISTURE WELL NORTH OF THE AREA. THE HIGHER
TERRAIN OF BAKER COUNTY AND THE WEST CENTRAL MOUNTAINS OF IDAHO
HAVE THE BEST CHANCE (30%) FOR ANY PRECIPITATION TUESDAY. SNOW
LEVELS WILL REMAIN HIGH, GENERALLY BETWEEN 7000 AND 8000 FEET
MSL, KEEPING ANY ACCUMULATIONS LIGHT AND LIMITED TO THE HIGHEST
PEAKS. EXPECT UNSEASONABLE WARMTH TO CONTINUE THROUGH THE END OF
THE PERIOD.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
WARM WEATHER WILL CONTINUE ON WEDNESDAY AHEAD OF A COLD FRONT
WHICH IS EXPECTED TO ARRIVE ON WEDNESDAY EVENING. THE FRONT WILL
BRING A 40 TO 50 PERCENT CHANCE OF PRECIPITATION LATE WEDNESDAY
THROUGH EARLY THURSDAY ACROSS THE NORTHERN HALF OF OUR FORECAST
AREA WITH SNOW LEVELS BRIEFLY FALLING TO AROUND 5000 FEET. IT
LOOKS LIKE THE FRONT WILL PASS THROUGH WITHOUT BRINGING ANY
PRECIPITATION TO THE SOUTHERN HALF OF THE FORECAST AREA. BREEZY
NORTHWEST WINDS BEHIND THE FRONT WILL BRING IN COLDER AIR AND
TEMPERATURES WILL BE BE NEAR SEASONAL NORMALS ON THURSDAY. MOST
FORECAST MODELS INDICATE THAT AN UPPER LEVEL RIDGE WILL REBUILD
OVER THE WESTERN US AGAIN ON FRIDAY WITH THE RIDGE STRENGTHENING
INTO THE WEEKEND. OUR FORECAST FOR SOUTHWESTERN IDAHO AND
SOUTHEASTERN OREGON RESPONDS TO THAT SCENARIO AND SHOWS DRY
WEATHER WITH A WARMING TREND STARTING ON FRIDAY. TEMPERATURES
WILL REBOUND TO AROUND 10 DEGREES ABOVE NORMAL ON FRIDAY AND
CONTINUE WARMING TO ABOUT 15 DEGREES ABOVE NORMAL BY SATURDAY
AND SUNDAY.
AVIATION /18Z SUNDAY THROUGH MONDAY/
ISSUED 1135 AM MDT SUN MAR 22 2026 VFR WITH SCT-BKN HIGH CIRRUS
CLOUDS WILL PREVAIL ACROSS SOUTHWESTERN IDAHO AND SOUTHEASTERN
OREGON THROUGH MONDAY. SURFACE WINDS WILL GENERALLY BE WESTERLY
AT LESS THAN 10 KTS ACROSS THE AREA THIS AFTERNOON, BECOMING
LIGHT AND VARIABLE TONIGHT AND ON MONDAY. WINDS ALOFT AT 10 KFT:
WEST 10 TO 15 KTS.
KBOI...VFR WITH LIGHT NORTHWESTERLY SURFACE WINDS LESS THAN 10
KTS TODAY, BECOMING SOUTHEASTERLY AT 3 TO 6 KTS TONIGHT.
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...JDS
LONG TERM....JB
AVIATION.....JB
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page