943
FXUS65 KBOI 180600
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1200 AM MDT WED MAR 18 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- RECORD HIGH TEMPERATURES WEDNESDAY THROUGH FRIDAY WITH DRY
CONDITIONS.
- PATTERN CHANGE TO COOLER AND UNSETTLED CONDITIONS BEGINNING
SATURDAY.
SHORT TERM /THROUGH THURSDAY NIGHT/
ISSUED ISSUED BY NATIONAL WEATHER SERVICE PENDLETON OR
UPPER LEVEL RIDGE WILL CONTINUE TO STRENGTHEN OVER THE SOUTHWEST
UNITED STATES DURING THE SHORT TERM. WHILE THE MOST EXTREME
HEAT WILL BE OVER THE DESERT SOUTHWEST, THIS WILL BRING SEVERAL
DAYS OF RECORD HIGH TEMPERATURES TO SOUTHEAST OR AND SOUTHWEST
ID. TEMPERATURES WILL BE 20-25 DEGREES ABOVE NORMAL, WITH THE
LOWEST VALLEYS SEEING LOW TO MID 80S AND THE MOUNTAINS REACHING
THE 60S OVER THE NEXT SEVERAL DAYS.
LONG TERM /FRIDAY THROUGH TUESDAY/
ISSUED ISSUED BY NATIONAL WEATHER SERVICE PENDLETON OR
AND WARM WITH RECORD TEMPERATURES (AROUND 20 DEGREES ABOVE
NORMAL). COME SATURDAY, THE RIDGE THAT DOMINATED THE SHORT-TERM
WILL BEGIN TO FLATTEN OUT. A SHORTWAVE GRAZING OUR NORTHERN
ZONES WILL SUPPORT A 20-50% CHANCE OF PRECIPITATION IN THE WEST
CENTRAL ID AND BOISE MOUNTAIN ZONES SATURDAY. WHILE UNCERTAINTY
REMAINS REGARDING THE EXACT MAGNITUDE OF A COOL DOWN, ZONAL FLOW
ALOFT WILL SUPPORT COOLING TEMPERATURES (ALTHOUGH STILL 5-10
DEGREES ABOVE NORMAL) AND BREEZY CONDITIONS. PRECIPITATION
CHANCES WILL INCREASE AREA-WIDE COME TUESDAY, AS A GULF OF
ALASKA LOW BEGINS APPROACHING OUR AREA. SNOW LEVELS WILL
FLUCTUATE BETWEEN 5-8.5 KFT MSL IN THE ZONAL FLOW, WITH THE
LOWER SNOW LEVELS NORTH.
AVIATION /06Z WEDNESDAY THROUGH THURSDAY/
ISSUED 1158 PM MDT TUE MAR 17 2026
VFR WITH HIGH CLOUDS. SURFACE WINDS: VARIABLE LESS THAN 10 KT.
WINDS ALOFT AT 10KFT MSL: W 15-30 KT.
KBOI...VFR. SURFACE WINDS: SE 4-10 KT.
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.....SA
SHORT TERM...KA
LONG TERM....NF
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