193
FXUS66 KPDT 072232
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
332 PM PDT THU MAY 7 2026
KEY MESSAGES
- ABOVE NORMAL TEMPERATURES AND DRY CONDITIONS CONTINUE THROUGH
NEXT WEEK
- BREEZY TO LOCALLY GUSTY GAP WINDS FRIDAY AND SUNDAY
- LOW RHS AND BREEZY WINDS WILL OVERLAP THE REMAINDER OF THIS
AFTERNOON AND TOMORROW AFTERNOON IN THE CASCADE GAPS AND LOWER
COLUMBIA BASIN
DISCUSSION
TONIGHT THROUGH SUNDAY: BREEZY CASCADE GAP WINDS
CONTINUE THIS AFTERNOON IN THE WAKE OF A SHORTWAVE EXIT EARLIER
THIS MORNING. OTHERWISE, HIGH THIN SCATTERED DECKS OF CIRRUS
ARE ALSO SPREADING ACROSS THE REGION THIS AFTERNOON.
UPPER LEVEL RIDGING WILL MOVE OVER THE FORECAST AREA THIS
AFTERNOON AND TONIGHT, CONTINUING A DRYING TREND WITH WINDS
BECOMING LIGHT OVERNIGHT. FRIDAY, A SHORTWAVE WILL BRIEFLY
FLATTEN THE RIDGE AS IT SLIDES INTO THE PACNW. VERY LITTLE
MOISTURE WILL ACCOMPANY THE SHORTWAVE PASSAGE TOMORROW,
RESULTING IN DRY CONDITIONS CONTINUING. HOWEVER, A DRY FRONTAL
BOUNDARY WILL FOLLOW THE SHORTWAVE, RESULTING IN INCREASING
WINDS THROUGH THE CASCADE GAPS AND INTO THE LOWER ELEVATIONS OF
THE FORECAST AREA. WINDS WILL GENERALLY BE 15-25MPH WITH GUSTS
UP TO 40MPH, HOWEVER WINDS WILL BE 25-35 MPH WITH GUSTS 45-55
MPH IN THE KITTITAS VALLEY TOMORROW AFTERNOON (CONFIDENCE
75-85%).
UPPER LEVEL RIDGING WILL REBOUND LATE FRIDAY AND PREVAIL THROUGH
SATURDAY NIGHT. WHILE DRY CONDITIONS WILL PERSIST THROUGH THE
WEEKEND, ANOTHER SHORTWAVE WILL FLATTEN THE RIDGE FOR SUNDAY,
RESULTING IN ANOTHER DAY OF BREEZY TO LOCALLY GUSTY WINDS IN THE
AFTERNOON AND EVENING.
MONDAY THROUGH WEDNESDAY: THERE IS GOOD AGREEMENT AMONGST
ENSEMBLE CLUSTER SOLUTIONS THAT UPPER LEVEL RIDGING WILL ONCE
AGAIN BUILD BACK OVER THE REGION, RESULTING IN DRY AND WARM
CONDITIONS WITH LIGHT WINDS MONDAY (CONFIDENCE 60-75%). TUESDAY
AND WEDNESDAY, AGREEMENT LOWERS QUITE A BIT AS ABOUT 50% OF
MEMBERS FAVOR A TROUGH PASSING OVER THE PACNW WHILE THE OTHER
ABOUT 50% FAVOR RIDGING PERSISTING OVERHEAD. THE TROUGHING
SOLUTION (FAVORED BY ECWMF MEMBERS) WOULD BRING LIGHT SHOWERS TO
THE CASCADE CREST LATE TUESDAY AND WEDNESDAY WITH BREEZY
CONDITIONS AND TEMPERATURES IN THE MID 70S TO LOWER 80S IN THE
LOWER ELEVATIONS; THE RIDGING SOLUTION (FAVORED BY GFS MEMBERS)
WOULD CONTINUE A DRYING TREND WITH TEMPERATURES WARMING INTO
THE UPPER 80S TO LOWER 90S IN THE LOWER ELEVATIONS. LAWHORN/82
AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
VFR CONDITIONS TO
PREVAIL THROUGH THE PERIOD. BREEZY WINDS 12-17KTS WITH GUSTS TO
25KTS WILL CONTINUE AT SITES DLS/PDT INTO THE LATE AFTERNOON AND
EARLY EVENING, WHILE WINDS WILL INCREASE AROUND 21Z AT SITES
RDM/BDN AND PERSIST INTO THE EVENING. BREEZY WINDS WILL REMAIN
AT SITE DLS OVERNIGHT, WITH LIGHT WINDS PREVAILING ELSEWHERE
OVERNIGHT. WINDS WILL BECOME BREEZY AT ALL SITES TOMORROW, WITH
STRONGEST WINDS AT SITES DLS/PDT. LAWHORN/82
FIRE WEATHER
AFTERNOON RELATIVE HUMIDITIES WILL REMAIN LOW
THROUGH NEXT, WITH AREAS OF CENTRAL OREGON REACHING SINGLE DIGITS
BY SATURDAY. GAP AND BASIN WINDS WILL CONTINUE TO BE LOCALLY
BREEZY THROUGH THIS AFTERNOON, AND WILL INCREASE TOMORROW AS A DRY
FRONT MOVES ACROSS WITH BREEZY TO LOCALLY GUSTY WESTERLY WINDS
DEVELOPING IN THE BASIN AND ADJACENT VALLEYS AND FOOTHILLS. POOR
TO MODERATE RECOVERY TONIGHT, WITH MODERATE TO GOOD RECOVERY
THROUGH THE WEEKEND.
HYDROLOGY
THE NACHES RIVER NEAR NACHES IS FORECAST TO REMAIN ABOVE ACTION
STAGE FOR THE NEXT WEEK. ABOVE-NORMAL TEMPERATURES ARE FORECAST
TO CONTINUE, AND SIGNIFICANT PRECIPITATION IS UNLIKELY (90
PERCENT CONFIDENCE) FOR THE NEXT WEEK.
PRELIMINARY POINT TEMPS/POPS
PDT 49 75 47 77 / 0 0 0 0
ALW 52 75 50 77 / 0 0 0 0
PSC 54 82 49 81 / 0 0 0 0
YKM 50 79 45 81 / 0 0 0 0
HRI 52 77 48 80 / 0 0 0 0
ELN 46 70 42 77 / 0 0 0 0
RDM 41 76 38 84 / 0 0 0 0
LGD 42 73 41 77 / 0 0 0 0
GCD 43 76 41 80 / 0 0 0 0
DLS 49 75 48 83 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...WIND ADVISORY FROM 11 AM TO 11 PM PDT FRIDAY FOR WAZ026.
OR...NONE.
DISCUSSION...82
AVIATION...82
FIRE WEATHER...82
HYDROLOGY...86
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