589
FXUS66 KPDT 031156
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
456 AM PDT MON AUG 3 2026
KEY MESSAGES
- ELEVATED TO CRITICAL FIRE WEATHER CONDITIONS POSSIBLE THROUGH
THE WEEK WITH BREEZY WINDS DEVELOPING WITH OVERLAPPING
LINGERING DRY AIR.
- SUB-PAR AIR QUALITY CONTINUES FROM LINGERING WILDFIRE SMOKE
AND HAZE.
- DRY CONDITIONS CONTINUE WITH AN UPPER LEVEL RIDGE PERSISTING
OVER THE REGION.
DISCUSSION
CURRENT RADAR AND SATELLITE CONTINUE TO ADVERTISE ANTICIPATED
DRY CONDITIONS ACROSS THE ENTIRE REGION. HAZE AND SMOKE FROM
LOCAL AND REGIONAL WILDLAND FIRES CONTINUE TO IMPACT AIR QUALITY
ACROSS THE CWA OVER THE NEXT COUPLE OF DAYS. THE OREGON
DEPARTMENT OF ENVIRONMENTAL QUALITY AND THE WASHINGTON
DEPARTMENT OF ECOLOGY CONTINUE THEIR AIR QUALITY
ADVISORIES/ALERTS FOR UNHEALTHY AIR QUALITY (GO ON OUR WEATHER
PAGE FOR MORE DETAILED INFORMATION) AT LEAST THROUGH MONDAY
AFTERNOON WITH POSSIBLE EXTENSIONS AS DETERMINED BY THE
RESPECTIVE AGENCIES.
FOR NOW, A SHORTWAVE IS CURRENTLY EXITING THE REGION THAT
DEVELOPED BREEZY TO LOCALLY WINDS ACROSS THE AREA EARLIER TODAY,
ESPECIALLY NEAR THE KITTITAS VALLEY WITH 35 TO 45 MPH GUSTS.
WITH THE SHORTWAVE PROPAGATING TO THE EAST, WINDS WILL REMAIN
RELATIVELY CALM THROUGH THE REST OF THE NIGHT WITH REGULAR
DIURNAL WINDS DEVELOPING TODAY. DURING THE MONDAY/TUESDAY
TIMEFRAME, A THERMAL TROUGH WILL DEVELOP THAT WILL BRING BREEZY
WINDS ACROSS THE COLUMBIA BASIN (30 TO 50 PERCENT CHANCE) WITH
MUCH DRIER AIR PUSHING IN, DROPPING RELATIVE HUMIDITY VALUES AS
FAR DOWN AS 10 TO 20 PERCENT. NBM CURRENTLY ADVERTISES EVEN
DRIER CONDITIONS WEDNESDAY WITH SOME RELATIVE HUMIDITY VALUES
POSSIBLY DROPPING IN THE SINGLE DIGITS. WITH THE ONSET OF BREEZY
WINDS DEVELOPING IN THE COLUMBIA BASIN TUESDAY OVERLAPPING WITH
DRY AIR, A FIRE WEATHER WATCH HAS BEEN ISSUED FOR THE OREGON
COLUMBIA BASIN AND PARTS OF CENTRAL OREGON. WE WILL SEE ELEVATED
FIRE WEATHER CONDITIONS PERSIST THROUGH THE LATE PART OF THIS
WEEK AS DRY AIR LINGERS AND CHANCES OF BREEZY WINDS DEVELOPING
INCREASE GOING INTO THURSDAY AND FRIDAY AS WELL. WILL NEED TO
ASSESS GOING THROUGH THE NEXT COUPLE OF DAYS, BUT WILL NOT BE
SURPRISED IF ADDITIONAL FIRE WEATHER HIGHLIGHTS ARE ISSUED AFTER
THE TUESDAY EVENT.
AVIATION /12Z TAFS THROUGH 12Z TUESDAY/
VFR CONDITIONS FOR MOST TAF SITES WITH LIGHT SUSTAINED WINDS OF
LESS THAN 12 KNOTS CONTINUE OVER THE NEXT 24-HOURS. WILL EXPECT
TO SEE HAZE AND SMOKE LINGER DUE TO ONGOING LOCAL AND NEARBY
WILDFIRES IN THE AREA. ALL TAF SITES WILL SEE A SMALL CHANCE (5
TO 15 PERCENT) OF SUB-VFR CONDITIONS TEMPORARILY DEVELOPING WITH
PASSING HEAVY PLUMES OF SMOKE AND HAZE.
PRELIMINARY POINT TEMPS/POPS
PDT 81 48 88 52 / 0 0 0 0
ALW 83 54 90 57 / 0 0 0 0
PSC 86 52 92 55 / 0 0 0 0
YKM 84 56 91 59 / 0 0 0 0
HRI 85 53 91 57 / 0 0 0 0
ELN 81 54 88 58 / 0 0 0 0
RDM 82 44 89 49 / 0 0 0 0
LGD 82 48 88 52 / 0 0 0 0
GCD 84 48 90 52 / 0 0 0 0
DLS 86 59 93 62 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...AIR QUALITY ALERT UNTIL 2 PM PDT THIS AFTERNOON FOR WAZ028>030.
OR...FIRE WEATHER WATCH FROM TUESDAY MORNING THROUGH TUESDAY
EVENING FOR ORZ691-701>703.
AIR QUALITY ALERT UNTIL 2 PM PDT THIS AFTERNOON FOR ORZ044-049-
050-502-503-505>511.
DISCUSSION...95
AVIATION...95
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