371
FXUS65 KBOI 012042
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
242 PM MDT SAT AUG 1 2026
KEY MESSAGES
- DRY COLD FRONT THIS EVENING WILL BRING CRITICAL FIRE WEATHER
CONDITIONS AND GUSTY WINDS.
- NOT AS HOT SUNDAY THROUGH TUESDAY.
- THE HEAT RETURNS BY MIDWEEK WITH TEMPERATURES BACK ABOVE
NORMAL.
SHORT TERM /THROUGH MONDAY NIGHT/
A DRY COLD FRONTAL PASSAGE REMAINS ON TRACK FOR LATER THIS
AFTERNOON/EVENING. GUSTY WINDS ALONG THE LEADING EDGE OF THE
FRONT WILL PUSH INTO BAKER COUNTY AFTER 3PM PDT, REACHING THE
OR/ID BORDER AROUND 7PM MDT, THEN ONTO THE WESTERN MAGIC VALLEY
BY 1AM MDT. GUSTS OF 35 TO 45 MPH WILL BLOW ACROSS BAKER COUNTY
AND FAR NORTHERN MALHEUR COUNTY, THE HIGHEST SPEEDS CHANNELING
ALONG THE I-84 CORRIDOR BETWEEN BAKER CITY AND ONTARIO. THE
GUSTY WINDS AND LOW RELATIVE HUMIDITY AHEAD OF AND ALONG THE
FRONT WILL CREATE CRITICAL FIRE WEATHER CONDITIONS THROUGH EARLY
EVENING. AS RELATIVE HUMIDITY RECOVERS WITH SUNSET, GUSTY WINDS
WILL CONTINUE ACROSS PORTIONS OF BAKER COUNTY AND HAVE KEPT THE
WIND ADVISORY TO HIGHLIGHT THE CONTINUED WIND THREAT INTO
TONIGHT. WINDS WILL REMAIN GUSTY OVERNIGHT (25-35 MPH) ACROSS
NORTHERN HARNEY AND MALHEUR COUNTIES, EASTWARD THROUGH THE SNAKE
PLAIN.
SUNDAY AND MONDAY ARE NOT AS HOT WITH HIGH TEMPERATURES AROUND
10 DEGREES BELOW NORMAL (LOW-MID 80S FOR THE VALLEYS). THE
MORNINGS WILL BE COOL AS WELL, WITH LOWS NOT SEEN SINCE LATE
JUNE OR EARLY JULY. WESTERLY WINDS WILL RAMP UP AGAIN ON SUNDAY
BRINGING GUSTS OF 25 TO 35 MPH ACROSS OPEN AND ELEVATED
TERRAIN OF SE OREGON AND THE SNAKE PLAIN OF IDAHO. MONDAY WILL
SEE BREEZY BUT LIGHTER WINDS WITH GUSTS REMAINING UNDER 25 MPH.
IN GENERAL EXPECT THE WILDFIRE SMOKE TO THIN OUT NEAR THE
SURFACE TONIGHT INTO SUNDAY. BEYOND THAT, WESTERLY WINDS WILL
WORK TO BRING THE SMOKE BACK INTO THE AREA FROM FIRES IN
CENTRAL OREGON. HOW QUICKLY IT RETURNS WILL DEPEND ON FIRE
ACTIVITY AFTER TONIGHT'S FRONTAL PASSAGE.
LONG TERM /TUESDAY THROUGH SATURDAY/
ANOTHER STRETCH OF HOT AND DRY CONDITIONS WILL SET IN NEXT WEEK
AS THE DESERT SW RIDGE EXPANDS NORTHWARD. THIS WILL BRING A
RETURN TO ABOVE NORMAL TEMPERATURES STARTING WEDNESDAY AND
CONTINUING THROUGH THE WEEKEND. WITHOUT SMOKE THIS WILL PUT
LOWER ELEVATIONS IN THE MID-UPPER 90S, HOWEVER WEST-NORTHWEST
FLOW ALOFT AND LIGHT WINDS NEAR THE SURFACE WOULD BE FAVORABLE
FOR SMOKE TO COLLECT FROM NEARBY FIRES. SIMILAR TO THIS LAST
WEEK, THE TRADEOFF FOR NOT QUITE AS HOT IN THE EXTENDED PERIOD
WILL BE DUE TO GREATER SMOKE COVERAGE/DENSITY.
AVIATION /18Z SATURDAY THROUGH SUNDAY/
ISSUED 1151 AM MDT SAT AUG 1 2026
WIDESPREAD LOW-VFR AND AREAS MVFR VISIBILITY THROUGH THIS
EVENING DUE TO WILDFIRE SMOKE. HOT TEMPERATURES CREATING HIGH
DENSITY ALTITUDE THIS AFTERNOON. SURFACE WINDS: SW-NW 5-15 KT
WITH GUSTS TO 15-25 KT THIS AFTERNOON, THEN, W-NW 10-20 KT WITH
25-45 KT GUSTS WITH COLD FRONT TONIGHT.
KBOI...WILDFIRE SMOKE WILL CONTINUE TO REDUCE VISIBILITY, WITH
MOSTLY LOW VFR CONDITIONS. BRIEF MVFR POSSIBLE THROUGH EARLY
EVENING. WESTERLY SURFACE WINDS WILL REMAIN IN PLACE THROUGH
SUNDAY.
SUNDAY OUTLOOK...GUSTY W-NW SURFACE WINDS 10-20 KT WITH GUSTS TO
30 KT THROUGH SUNSET. WILDFIRE SMOKE IS EXPECTED TO MIX OUT
WHICH WILL IMPROVE NEAR SURFACE VISIBILITY WHILE WESTERLY WINDS
ALOFT TRANSPORT ELEVATED SMOKE LAYERS INTO THE REGION.
BOI WATCHES/WARNINGS/ADVISORIES
ID...AIR QUALITY ALERT UNTIL 2 PM MDT MONDAY FOR IDZ011-012-014-015-
029-033.
RED FLAG WARNING UNTIL 9 PM MDT THIS EVENING FOR IDZ400-402-
423.
OR...RED FLAG WARNING UNTIL 9 PM MDT /8 PM PDT/ THIS EVENING FOR
ORZ670>675.
AIR QUALITY ALERT UNTIL 3 PM MDT /2 PM PDT/ MONDAY FOR
ORZ061>064.
WIND ADVISORY FROM 8 PM THIS EVENING TO 2 AM PDT SUNDAY FOR
ORZ062.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
SHORT TERM...DG
LONG TERM....DG
AVIATION.....DG
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