997
FXUS65 KBOI 260342
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
842 PM MST WED FEB 25 2026
DISCUSSION
DRY AIR IS MOVING IN TO THE REGION THIS EVENING,
WITH A FEW VIRGA SHOWERS LINGERING IN THE BOISE/WEST CENTRAL
MOUNTAINS AND PATCHY LOW CLOUDS LINGERING IN AREA VALLEYS.
THESE CLOUDS MIGHT BE ENOUGH TO STAVE OFF PATCHY FOG FORMATION,
DEPENDING ON IF THEY LINGER THROUGH THE NIGHT. CURRENT FORECASTS
FAVOR THAT THEY WILL DISSIPATE BY MIDNIGHT, ALLOWING FOR
PATCHY FOG TO FORM IN SHELTERED VALLEYS THROUGH THE EARLY
MORNING HOURS. DRY CONDITIONS WITH A SLIGHT WARMING TREND WILL
CONTINUE THROUGH THE END OF THE WORK WEEK WITH SCATTERED
PRECIPITATION ANTICIPATED BY SUNDAY. NO UPDATES NECESSARY TO THE
FORECAST.
AVIATION
VFR EXCEPT FOR PATCHY IFR/LIFR IN FOG DEVELOPING
OVERNIGHT AND CONTINUING INTO THURSDAY MORNING. SURFACE WINDS:
VARIABLE 10 KTS OF LESS. WINDS ALOFT AT 10 KFT MSL: W-NW 35-50 KTS
DECREASING TO 25-40 KTS AFTER MIDNIGHT.
KBOI...VFR. SURFACE WINDS: VARIABLE 5 KTS OR LESS OVERNIGHT INTO
THURSDAY.
PREV DISCUSSION
SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...A WEAK COLD FRONT
IS CURRENTLY PUSHING SOUTH AND EAST THROUGH THE REGION AND
SHOULD EXIT TO THE EAST BY SUNSET. SCATTERED SHOWERS CONTINUE
ACROSS SOUTHWEST IDAHO THIS AFTERNOON, WHILE DRIER AIR IS
ALREADY BEGINNING TO FILTER INTO SOUTHEAST OREGON. SHOWERS
EXPECTED TO DISSIPATE BY SUNSET. A TRANSIENT UPPER LEVEL RIDGE
WILL BUILD FROM THE WEST LATER TONIGHT, LEADING TO CLEARING
SKIES. WITH RECENT PRECIPITATION AND CLEARING CONDITIONS, PATCHY
FOG IS EXPECTED TO DEVELOP IN THE SHELTERED VALLEYS EARLY
THURSDAY MORNING. LOW TEMPERATURES TONIGHT WILL BE NEAR SEASONAL
NORMALS, WITH LOWER VALLEYS IN THE UPPER 20S TO LOWER 30S AND
MOUNTAIN VALLEYS IN THE 10S AND 20S.
DRY AND STABLE CONDITIONS WILL PREVAIL THURSDAY AND FRIDAY AS
THE RIDGE SHIFTS INLAND. NORTHWEST FLOW ALOFT WILL KEEP
TEMPERATURES SLIGHTLY ABOVE NORMAL BY FRIDAY AFTERNOON. BREEZY
CONDITIONS ARE EXPECTED EACH AFTERNOON, PARTICULARLY IN THE
WESTERN MAGIC VALLEY AND ALONG RIDGELINES, WITH GUSTS REACHING
20 TO 30 MPH.
LONG TERM...SATURDAY THROUGH WEDNESDAY...AN UPPER-LEVEL TROUGH
WILL MOVE INTO THE OR/CA BORDER REGION SATURDAY MORNING,
BRINGING SOUTHWEST FLOW ALOFT. SHOWER CHANCES INCREASE FROM SE
OREGON, BEGINNING LATE SATURDAY MORNING INTO AFTERNOON, AND MOVE
INTO SW IDAHO SATURDAY AFTERNOON INTO EVENING. PRECIPITATION
CHANCES WILL PERSIST THROUGH MONDAY AFTERNOON UNTIL THE SYSTEM
MOVES FURTHER SE OF THE REGION, WITH CHANCES AROUND 30-50%
AREAWIDE. SNOW LEVELS RANGE FROM 5000FT NEAR BAKER CITY AND
MCCALL, TO AROUND 7500FT NEAR THE NV BORDER WITH THIS SYSTEM.
BEHIND THIS SYSTEM, UPPER-LEVEL RIDGING WILL BUILD BACK INTO THE
AREA. THIS WILL BRING SPRING-LIKE TEMPERATURES, WITH VALLEYS
REACHING THE LOW TO MID 60S ON TUESDAY OR AROUND 10-15 DEGREES
ABOVE NORMAL. ENSEMBLES HINT AT A COLD FRONT MOVING THROUGH THE
AREA LATE WEDNESDAY, WITH SNOW LEVELS LOWERING TO AROUND
4000-5000FT AND LIGHT SNOW ACCUMULATIONS OVER THE MOUNTAINS.
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.....TL
SHORT TERM...JDS
LONG TERM....CH
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