568
FXUS66 KPDT 300841
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
141 AM PDT SAT MAY 30 2026
KEY MESSAGES
- DRIER CONDITIONS RETURN INTO THE MIDDLE OF NEXT WEEK, WITH
WINDS BECOMING LIGHT BY EARLY NEXT WEEK
- NEAR TO BELOW NORMAL TEMPERATURES THIS WEEKEND WARMING TO
ABOVE NORMAL INTO THE MIDDLE OF NEXT WEEK
DISCUSSION
TODAY THROUGH TUESDAY: SATELLITE IMAGERY TONIGHT
SHOWS CLOUDY CONDITIONS ACROSS CENTRAL OR AND EASTERN HALF OF
THE FORECAST AREA, WHILE LIGHT SHOWERS CONTINUE TO MOVE ACROSS
WALLOWA AND UNION COUNTIES. BREEZY WINDS REMAIN THROUGH THE
CASCADE GAPS AND ACROSS PORTIONS OF THE COLUMBIA BASIN TONIGHT.
SHOWER ACTIVITY WILL DIMINISH INTO THE MORNING HOURS TODAY AS AN
UPPER TROUGH CONTINUES TO SWING NORTHEAST ACROSS THE NORTHERN
ROCKIES. WHILE CONDITIONS DRY OUT ACROSS THE FORECAST AREA,
BREEZY WINDS (15-25MPH WITH GUSTS UP TO 40MPH) WILL CONTINUE
THROUGH THE CASCADE GAPS, WITH LOCALLY BREEZY WINDS ACROSS THE
COLUMBIA BASIN AND BLUE MOUNTAIN FOOTHILLS.
BY SUNDAY, WEAK RIDGING WILL DEVELOP JUST OFFSHORE WHILE THE
TROUGH TRANSITIONS INTO A BROAD LOW OVER WESTERN MT AND NORTHERN
ID. BY TUESDAY AFTERNOON, THE UPPER LOW WILL KICK EAST WITH
UPPER RIDGE SLIDING OVER THE PACNW. WINDS WILL BECOME WEAK AND
DIURNALLY DRIVEN THROUGH TUESDAY, WHILE A WEAK WARMING TREND
WILL SEE AFTERNOON TEMPERATURES IN THE 80S RETURN MONDAY AND
TUESDAY.
WEDNESDAY THROUGH FRIDAY: ENSEMBLE GUIDANCE IS IN GOOD AGREEMENT
OF AN UPPER SHORTWAVE TROUGH SLIDING ACROSS THE PACNW WEDNESDAY,
THOUGH THERE IS SOME UNCERTAINTY IN TIMING AND STRENGTH OF THIS
FEATURE. WHILE THE MAIN CONSENSUS IS FOR A RETURN OF MOUNTAIN
SHOWERS AND BREEZY LOWLAND WINDS, SOME SOLUTIONS (28% OF
MEMBERS) FAVOR A STRONGER SHORTWAVE THAT WILL BRING AREA WIDE
SHOWERS THAT WILL PERSIST THROUGH THURSDAY MORNING. OTHERWISE,
THIS PATTERN WOULD ALSO FAVOR A RETURN OF AFTERNOON/EVENING
ISOLATED THUNDERSTORMS OVER THE MOUNTAIN AREAS WEDNESDAY.
DRY CONDITIONS WILL RETURN TO THE AREA AFTER THE SHORTWAVE EXIT
THURSDAY, BUT ENSEMBLE GUIDANCE IS IN AGREEMENT THAT SHOWERS
WILL RETURN TO THE CASCADES AND BREEZY CASCADE GAP WINDS WILL
DEVELOP SOMETIME FRIDAY AS AN UPPER LOW SETS UP OFFSHORE THE
PACNW (CONFIDENCE 40-60%). LAWHORN/82
AVIATION /06Z TAFS THROUGH 06Z SUNDAY/
VFR CONDITIONS WILL
GENERALLY PREVAIL THROUGH THE PERIOD.
ALTHOUGH BECOMING WEAKER, BREEZY WESTERLY POST COLD FRONTAL
WINDS WILL PERSIST OVERNIGHT AT MOST THE THE BASIN AND VALLEY
TERMINALS (YKM/DLS/PSC/PDT/ALW). THE STRONGEST OF THESE WILL BE
THE GUSTS UP TO 30 KNOTS AT DLS. VFR FLIGHT CATEGORY IS
ANTICIPATED AT ALL TERMINALS AND NO LOW CEILINGS OR
OBSTRUCTIONS TO VISIBILITY ARE EXPECTED. LOOK FOR WINDS TO
UPTICK ONCE AGAIN IN THE BASIN AND VALLEY TERMINALS BY MID TO
LATE SATURDAY MORNING.
PRELIMINARY POINT TEMPS/POPS
PDT 67 42 71 44 / 0 0 0 0
ALW 69 47 72 48 / 0 0 0 0
PSC 74 43 77 46 / 0 0 0 0
YKM 73 43 77 47 / 0 0 0 0
HRI 71 44 74 45 / 0 0 0 0
ELN 64 40 71 44 / 0 0 0 0
RDM 62 30 67 34 / 0 0 0 0
LGD 65 37 69 39 / 0 0 0 0
GCD 65 34 70 37 / 0 0 0 0
DLS 69 46 76 49 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...82
AVIATION...71
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