109
FXUS65 KBOI 122356
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
556 PM MDT FRI JUN 12 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- WARM AND DRY THROUGH MONDAY.
- TUESDAY IS HOT WITH GUSTY WINDS LIKELY.
- REMAINING DRY BUT NOT AS HOT STARTING WEDNESDAY WITH GUSTY
AFTERNOON WINDS CONTINUING.
SHORT TERM /THROUGH SUNDAY NIGHT/
ISSUED 230 PM MDT FRI JUN 12 2026
A WEAK FRONT WILL KICK THROUGH THE REGION THIS EVENING BRINGING
GUSTY WINDS TO PORTIONS OF E-CENTRAL OREGON AND THE LOWER SNAKE
PLAIN OF IDAHO. GUSTS OF 25-35 MPH WILL IMPACT BAKER AND
NORTHERN MALHEUR COUNTIES IN OREGON AND THE WEISER BASIN AND
ALONG THE SNAKE RIVER IN IDAHO THROUGH ABOUT MIDNIGHT. FOR THE
WEEKEND, AN UPPER RIDGE OFF THE WEST COAST WILL KEEP OUR AREA
UNDER NORTHWEST FLOW. DRY AND STABLE AIR ALOFT WILL CAP ANY
POTENTIAL FOR PRECIPITATION DEVELOPMENT. WILL SEE LITTLE CHANGE
IN TEMPERATURES FROM TODAY TO SATURDAY. MORE NOTABLE WARMING
WILL SHOW UP ON SUNDAY AS THE RIDGE AXIS REACHES THE COAST.
LONG TERM /MONDAY THROUGH FRIDAY/
ISSUED 230 PM MDT FRI JUN 12 2026
GUIDANCE REMAINS IN AGREEMENT ON SYNOPTIC PATTERN DOMINATED BY
AN UPPER-LEVEL RIDGE OVER PACIFIC AND WEST COAST AND BROAD LOW
PRESSURE OVER CANADA. THE BOUNDARY BETWEEN THESE TWO SYSTEMS IS
AN AREA OF DRYING, WARMING, AND CLEAR CONDITIONS WITH GUSTY
AFTERNOON WINDS. MONDAY AND TUESDAY CLIMB SEVERAL DEGREES EACH,
WITH TUESDAY BEING THE WARMEST AND DRIEST DAY IN THE FORECAST.
THE SNAKE PLAIN AND HIGH DESERT OF SW IDAHO AND SE OREGON WILL
SEE AFTERNOON HIGH TEMPERATURES IN THE MID TO LOW 90S ON
TUESDAY. AT THE SAME TIME ON TUESDAY, A SHORTWAVE IN THE
CANADIAN LOW SKIMS OUR REGION AND BRIEFLY STRENGTHENS THE UPPER
FLOW AND SURFACE WIND SPEED. THE CURRENT FORECAST HAS 30-40 MPH
GUSTS COINCIDENT WITH VERY HOT TEMPERATURES AND RHS IN THE 10S
AND SINGLE DIGITS. THIS WILL LEAD TO A POTENTIALLY CRITICAL FIRE
WEATHER PATTERN, ASSUMING THE FORECAST HOLDS FIRM. LATER IN THE
WEEK, A CLOSE LOW AMPLIFIES AND WORKS INTO THE RIDGE AREA
DROPPING TEMPERATURES SLIGHTLY FROM 15 DEGREES ABOVE NORMAL ON
TUESDAY TO 5-10 DEGREES ABOVE NORMAL WEDNESDAY THROUGH FRIDAY.
WINDS CONTINUE TO GUST 20-30 MPH IN THE UPPER SNAKE PLAIN
THROUGH THIS PERIOD, AND AS THE LOW APPROACHES THE CHANCE FOR
THUNDERSTORMS ALONG THE NV BORDER INCREASES THURSDAY AND FRIDAY.
AVIATION /00Z SATURDAY THROUGH SUNDAY/
ISSUED 555 PM MDT FRI JUN 12 2026
VFR, FEW HIGH CLOUDS. SURFACE WINDS: NW 10-20 KT WITH GUSTS TO
20-35 KT THROUGH EARLY AM, THEN VARIABLE 5-15 KT REST OF SAT
AM. BECOMING NW-NE 10-20 KT WITH GUSTS TO 20-30 KT SAT AFTERNOON.
WINDS ALOFT AT 10KFT MSL: NW-N 15-25 KT.
KBOI...VFR, FEW HIGH CLOUDS. SURFACE WINDS: W-N 5-15 KT. GUSTS TO 20-
25 KT WILL TAPER OFF AROUND SUNSET AND RETURN SAT AFTERNOON.
SUNDAY OUTLOOK...VFR AND PASSING HIGH CLOUDS. A FEW AFTERNOON
MOUNTAIN CUMULUS. SURFACE WINDS: VARIABLE 5-15 KT SUNDAY AM, THEN NW-
NE 5-15 KT WITH GUSTS AROUND 20 KT IN THE AFTERNOON.
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...DG
LONG TERM....JM
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