625
FXUS66 KPDT 012116
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
216 PM PDT MON JUN 1 2026
KEY MESSAGES
- DRY CONDITIONS WITH WARMING TEMPERATURES THROUGH WEDNESDAY.
COOLER THEREAFTER.
- MOUNTAIN SHOWERS AND THUNDERSTORMS WEDNESDAY, AND AGAIN
POSSIBLY FRIDAY INTO SATURDAY.
- BREEZY TO WINDY CONDITIONS WEDNESDAY AND AGAIN FRIDAY INTO SATURDAY.
DISCUSSION
AN UPPER LOW CONTINUE TO SPIN ACROSS MONTANA AND SOUTHERN
CANADA. IT WILL GRADUALLY MOVE EASTWARD. AS IT DOES, THE BROADER
TROUGH OVER THE PACIFIC NORTWEST WILL MOVE AS WELL, AND WEAK
RIDGING WILL MOVE IN FOR TUESDAY.
A QUICK MOVING TROUGH WILL THEN FOLLOW FOR WEDNESDAY. THIS
TROUGH AND ASSOCIATED UPPER LEVEL ENERGY WILL BRING A CHANCE OF
SHOWERS, AND A LOW (<20 PERCENT) CHANCE OF THUNDERSTORMS, MAINLY
TO THE MOUNTAINS. PRECIP CHANCES WILL CONTINUE INTO EARLY
THURSDAY, MAINLY FOR THE EASTERN OREGON MOUNTAINS. THERE WILL
ALSO BE BREEZY TO WINDY CONDITIONS AS THE TROUGH MOVES THROUGH
WITH WIND GUSTS 25 TO 35 MPH WITH GUSTS AS HIGH AS 40 MPH IN THE
NORMALLY BREEZY AREAS. NBM PROBABILITIES OF WIND GUSTS >=39 MPH
RANGE BETWEEN ABOUT 40 AND 80 PERCENT ACROSS THE AREA.
A MORE ZONAL FLOW WILL MOVE IN FOR THURSDAY, DRYING THINGS OUT.
THEN, AN UPPER LOW AND TROUGH WILL MOVE INTO THE PACIFIC
NORTHWEST BEGINNING ON FRIDAY. WHILE THE MAIN UPPER LOW WILL
LIKELY MOVE ALONG THE WASHINGTON/BRITISH COLUMBIA BORDER, THE
BROADER TROUGH WILL MOVE THROUGH THE PACIFIC NORTHWEST, WITH A
MORE ZONAL FLOW RETURNING SUNDAY. THE MAIN IMPACTS WILL BE
SHOWERS AND POSSIBLY THUNDERSTORMS OVER THE MOUNTAINS.
ADDITIONALLY, BREEZY TO WINDY CONDITIONS WILL DEVELOP FRIDAY
AFTERNOON OVER THE LOWER ELEVATIONS AND PEAK ON SATURDAY. WIND
GUSTS OF 35 TO 35 MPH WITH GUSTS TO 40 MPH ARE POSSIBLY IN THE
NORMALLY BREEZY AREA...THE CASCADE GAPS, SIMCOE HIGHLANDS,
COLUMBIA BASIN AND GORGE, AND FOOTHILLS OF THE BLUE MOUNTAINS.
NBM PROBABILITIES OF WIND GUSTS >=39 MPH RANGE BETWEEN 40 AND 80
PERCENT ACROSS THIS AREA ON FRIDAY, AND ABOUT 50 AND 80 PERCENT
ON SATURDAY.
AVIATION /18Z TAFS THROUGH 18Z TUESDAY/
VFR CONDITIONS PREVAIL WITH LIGHT WINDS OF 12 KNOTS OF LESS.
WIND WILL BE DRIVEN BY TERRAIN AT TIMES, ESPECIALLY IN THE
EARLY MORNING HOURS. NO CIG OR VIS ISSUES EXPECTED.
PRELIMINARY POINT TEMPS/POPS
PDT 48 81 50 79 / 0 0 0 0
ALW 52 81 54 81 / 0 0 0 0
PSC 51 85 52 84 / 0 0 0 0
YKM 53 84 54 82 / 0 0 0 20
HRI 50 84 51 82 / 0 0 0 0
ELN 48 79 52 76 / 0 0 0 30
RDM 41 82 49 74 / 0 0 0 10
LGD 44 79 46 79 / 0 0 0 20
GCD 42 83 46 79 / 0 0 0 20
DLS 57 87 60 78 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...77
AVIATION...95
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