957
FXUS66 KPDT 150552
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1052 PM PDT THU MAY 14 2026
KEY MESSAGES
- BREEZY CONDITIONS THROUGH FRIDAY.
- AN AREA OF LOW PRESSURE WILL BRING RAIN, MAINLY TO THE
MOUNTAINS SATURDAY INTO EARLY SUNDAY.
- DRY AND WARMER WEATHER FOR MUCH OF NEXT WEEK.
DISCUSSION
WESTERLY ZONAL FLOW WILL CONTINUE INTO SATURDAY. THIS WILL ALLOW
FOR MAINLY DRY WEATHER ACROSS THE PACIFIC NORTHWEST. HOWEVER,
SOME UPPER LEVEL ENERGY COULD BRING SOME RAIN TO THE CASCADES
LATER TONIGHT.
A BETTER CHANCE OF PRECIPITATION ARRIVES LATER FRIDAY INTO
SATURDAY AS AN UPPER LOW AND TROUGH MOVE SOUTHEAST FROM BRITISH
COLUMBIA INTO THE REGION. MAINLY MOUNTAIN PRECIPITATION IS
EXPECTED, THOUGH SOME LOWER ELEVATION RAIN IN THE AREAS NEAR THE
MOUNTAINS IS POSSIBLE, ESPECIALLY SATURDAY AFTERNOON AND
EVENING. SNOW LEVELS WILL BRIEFLY DROP BELOW 4000 FEET SATURDAY
MORNING BEFORE RISING TO AROUND 4000 FEET LATER SATURDAY, SO
THERE COULD EVEN BE SOME SNOW MIXED IN. HOWEVER, LITTLE, IF ANY
ACCUMULATION IS EXPECTED. THERE IS ALSO AT LEAST SOME CHANCE OF
THUNDER IN THE MOUNTAINS AS THE UPPER LOW MOVES THROUGH.
AS THE LOW MOVES THROUGH, THERE WILL ALSO BE SOME BREEZY TO TO
LOCALLY WINDY CONDITIONS MAINLY ACROSS THE CASCADE GAPS,
COLUMBIA BASIN, AND BLUE MOUNTAIN FOOTHILLS. RIGHT NOW WIND
GUSTS LOOK MAINLY IN THE 25 TO 30 MPH RANGE, POSSIBLY AS HIGH AS
40 MPH. NBM PROBABILITIES FOR WIND GUSTS >=39 MPH ARE ONLY ABOUT
50 PERCENT ACROSS PORTIONS OF THE BASIN AND LOWER ELSEWHERE.
BEYOND SUNDAY, HIGH PRESSURE BUILDS BACK INTO THE AREA AND DRY
AND WARM CONDITIONS ARE ANTICIPATED FOR MUCH OF THE UPCOMING
WEEK.
A FEW HYDROLOGY NOTES, THE NACHES RIVER AT NACHES IS ABOVE
ACTION STAGE AND IS FORECAST TO REMAIN THERE UNTIL FRIDAY
MORNING OR EARLY AFTERNOON. THE NACHES RIVER AT CLIFFDELL IS
ALSO RUNNING HIGH BUT IS BELOW ACTION STAGE AND EXPECTED TO
REMAIN THERE. SEVERAL POINTS ON THE YAKIMA RIVER WILL EXPERIENCE
DECENT IN BANKS RISES BUT WILL REMAIN WELL BELOW ACTION STAGE.
AVIATION /06Z TAFS THROUGH 06Z SATURDAY/
VFR CONDITIONS WILL CONTINUE THROUGH THE FORECAST PERIOD WITH NO
CIG OR VIS ISSUES EXPECTED. MAIN WEATHER HIGHLIGHT WILL BE THE
BREEZY WINDS IMPACTING ALL SITES WITH 15-25 KNOT GUSTS THROUGH
MOST OF THE FORECAST PERIOD.
PRELIMINARY POINT TEMPS/POPS
PDT 41 63 40 59 / 0 0 10 20
ALW 45 63 43 59 / 10 0 20 60
PSC 45 67 41 65 / 0 0 10 20
YKM 39 64 38 63 / 0 0 10 10
HRI 44 65 40 63 / 0 0 10 10
ELN 36 56 32 55 / 10 10 30 10
RDM 33 65 32 53 / 0 0 10 10
LGD 39 63 38 52 / 0 0 30 70
GCD 36 66 36 53 / 0 0 10 30
DLS 46 64 43 61 / 0 0 70 30
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...77
AVIATION...95
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