918
FXUS66 KPDT 131140
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
440 AM PDT SAT JUN 13 2026
KEY MESSAGES
- WARMING AND DRYING TREND CONTINUES THROUGH NEXT WEEK.
- HEAT RISKS INCREASING BY EARLY TO MID NEXT-WEEK.
- BREEZY TO WINDY CONDITIONS, ALONG WITH DRY CONDITIONS, WILL
ELEVATE FIRE WEATHER CONCERNS.
DISCUSSION
AN UPPER LEVEL RIDGE CURRENTLY OFFSHORE IS RESPONSIBLE FOR OUR
CLEAR, WARM, AND DRY CONDITIONS OVER THE AREA. THIS TREND WILL
CONTINUE THROUGH AT LEAST EARLY NEXT-WEEK AS THE RIDGE CONTINUES
TO AMPLIFY OVER THE WEEKEND AND MOVE ONSHORE. AT THE SAME TIME,
A BROAD AREA TROUGH IN THE NORTHERN GREAT PLAINS WITH AN
EMBEDDED SHORTWAVE WILL MOVE THROUGH THE AREA, BRINGING BREEZY
CONDITIONS OVER THE WEEKEND WITH GUSTS UP TO 15-25 MPH (50-70%
CHANCE). DRY AIR WITH MINIMUM RELATIVE HUMIDITIES WILL STAY IN
THE TEENS AND UPPER 20S BEFORE THEY SPREAD THROUGH MUCH OF THE
LOWER ELEVATIONS. ELEVATED FIRE LEVEL CONCERNS WILL BE ISOLATED
OVER THE WEEKEND WITH THE GREATEST POTENTIAL FOR RFW CRITERIA
THROUGH THE MID-WEEK (MORE DETAILS BELOW IN THE FIRE WEATHER
SECTION).
THE WARMING TREND WILL CONTINUE THROUGH AT LEAST MONDAY (70-90%
CHANCE) WITH HIGHS IN THE MID TO UPPER 90S IN MOST OF THE LOWER
ELEVATION SPOTS. NBM CURRENTLY ADVERTISES 60-90% CHANCES THAT
PARTS OF THE DALLES THROUGH THE COLUMBIA BASIN & THE YAKIMA
VALLEY WILL SEE TEMPERATURES EXCEEDING 95 DEGREES MONDAY.
MAJOR HEAT RISK VALUES (2.5+) HAS EXPANDED INTO PARTS OF THE
DALLES, YAKIMA VALLEY, AND CENTRAL OREGON ON MONDAY WITH MINOR
HEAT RISK (VALUE OF '2') ACROSS THE REST OF THE ELEVATED AREAS.
TUESDAY HAS SEEN A DOWNTREND IN THE AERIAL COVERAGE OF VALUES
OF '2', THOUGH IT IS NOTED THAT PARTS OF CENTRAL OREGON ARE NOW
IN A MAJOR HEAT RISK. REGARDLESS, WARM TEMPERATURES WILL POSE A
THREAT TO AT LEAST THE MOST SENSITIVE GROUPS.
AVIATION /12Z TAFS THROUGH 12Z SUNDAY/
VFR CONDITIONS PREVAIL WITH LIGHT WINDS LESS THAN 12 KNOTS
INITIATING. PDT/RDM/BDN/ALW WILL SEE SOME BREEZIER WINDS OF
GUSTS UP TO 25 KNOTS DEVELOPING BY 19-21Z. WINDS WILL TAPER DOWN
BY 03-05Z THEN THROUGHOUT THE REST OF THE TAF PERIOD. NO CIG OR
VIS ISSUES EXPECTED.
FIRE WEATHER
FIRE WEATHER CONCERNS INCREASE GOING INTO EARLY NEXT-WEEK WITH
DRY AIR IN THE REGION. RH'S IN THE TEENS TO 20S WILL PREVAIL
THROUGH AT LEAST EARLY NEXT WEEK (>85% CHANCE) WITH BREEZY TO
LOCALLY WINDY CONDITIONS DEVELOPING TUESDAY. MAIN AREAS OF
CONCERNS WILL BE THE COLUMBIA BASIN (WA/OR691) AND CENTRAL
OREGON (OR700, OR704, AND OR705). WITH THAT, A FIRE WEATHER
WATCH MAY BE ISSUED OVER THE NEXT 24-48 HOURS (60-80% CONFIDENCE
LEVEL). WHILE DRY AIR CONTINUES THROUGH THE WEEKEND, WINDS WILL
NOT BE AS STRONG AS TUESDAY, BUT POCKETS OF BREEZY WINDS WILL
DEVELOP, ALLOWING ISOLATED AREAS REACHING RFW CRITERIA.
PRELIMINARY POINT TEMPS/POPS
PDT 84 50 87 53 / 0 0 0 0
ALW 85 54 88 57 / 0 0 0 0
PSC 88 56 92 57 / 0 0 0 0
YKM 87 57 92 60 / 0 0 0 0
HRI 87 55 90 56 / 0 0 0 0
ELN 83 54 88 58 / 0 0 0 0
RDM 84 48 87 49 / 0 0 0 0
LGD 81 48 84 49 / 0 0 0 0
GCD 83 45 87 47 / 0 0 0 0
DLS 90 62 93 64 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...95
FIRE WEATHER...95
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