133
FXUS66 KPDT 211625
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
925 AM PDT THU MAY 21 2026
KEY MESSAGES
- DRY AND WARMER CONDITIONS THROUGH SATURDAY
- BREEZY TO WINDY OVER THE WEEKEND
- INCREASING CONFIDENCE IN COOLER AND WETTER
WEATHER EARLY NEXT WEEK
DISCUSSION
DARKENING IN THE MID LEVEL WATER VAPOR GOES IMAGERY SHOWED THE
SHORTWAVE MOVING SOUTHEAST THROUGH THE IDAHO PANHANDLE DRIVING
THE SURFACE LAYER COLD FRONT SOUTHWEST AS SEEN BY THE NE WA
OBSERVATIONS. THE WEAK COLD FRONT WILL HAVE LITTLE IMPACT ON THE
PDT AREA AND HIGH TEMPERATURES WILL BE SIMILAR TO YESTERDAYS AND
ON AVERAGE A COUPLE OF DEGREES WARMER. BEYOND TODAY, AND
THROUGH SATURDAY AFTERNOON TEMPERATURES WILL BE ON THE RISE,
REACHING HIGHS IN THE MID 80S ACROSS THE YAKIMA VALLEY, CENTRAL
OREGON AND THE FOOTHILLS OF THE BLUE MOUNTAINS. HIGHS COULD HIT
AROUND 90 DEGREES IN PART SO THE LOWER COLUMBIA AND JOHN DAY
BASINS. BREEZY TO WINDY CONDITIONS OVER THE WEEKEND THROUGH
ONSHORE FLOW AND PRESSURE GRADIENTS ACROSS THE CASCADES GAPS.
LOOKING AT THE NBM MEAN GUSTS, 30 TO 40 MPH GUSTS COULD BE
EXPECTED THOUGH THE KITTITAS VALLEY, EASTERN COLUMBIA RIVER
GORGE AND BLUE MOUNTAIN FOOTHILLS/COLUMBIA BASIN OF OREGON.
BASED ON NBM MEMBERS, THERE IS ABOUT A 20 TO 60% CHANCES FOR
ADVISORY LEVEL WIND GUSTS IN EXCESS OF 45 MPH ACROSS AREAS OF
THESE AFOREMENTIONED ZONES.
A LOOK AT THE ENSEMBLES FOR THE LATE WEEKEND AND EARLY NEXT
WEEK LEADS TO HIGH CONFIDENCE IN THE TRANSITION TO WETTER, AND
COOLER WEATHER WITH ALSO MEAN QPFS INDICATING WETTING RAINS
ACROSS THE MOUNTAIN ZONES. MOUNTAIN ZONE PROBABILITIES OF
WETTING RAINS (GREATER THAN ONE TENTH OF AN INCH) ARE ABOUT
60-95% MONDAY INTO TUESDAY.
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
VFR CONDITIONS WILL CONTINUE WITH CLEAR TO FEW SKIES AND CALM
TO LIGHT WINDS CONTINUE OVER THE NEXT 24-HOURS. NO VIS OR CIG
ISSUES EXPECTED.
PRELIMINARY POINT TEMPS/POPS
PDT 75 46 80 49 / 0 0 0 0
ALW 76 50 80 53 / 0 0 0 0
PSC 80 48 85 52 / 0 0 0 0
YKM 80 51 84 53 / 0 0 0 0
HRI 79 48 83 52 / 0 0 0 0
ELN 74 47 78 50 / 0 0 0 0
RDM 77 41 81 44 / 0 0 0 0
LGD 72 42 77 45 / 0 0 0 0
GCD 75 39 80 43 / 0 0 0 0
DLS 82 54 85 54 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...71
AVIATION...95
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