164
FXUS66 KPDT 050501
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1001 PM PDT SAT APR 4 2026
KEY MESSAGES
- ABOVE NORMAL TEMPERATURES IN THE 70S/80S THROUGH MONDAY.
- BREEZY CONDITIONS POSSIBLE EARLY NEXT WEEK.
- SLIGHT CHANCES OF MOUNTAIN SHOWERS AND THUNDERSTORMS MONDAY &
TUESDAY.
DISCUSSION
AN UPPER-LEVEL RIDGE IS SETTLED ACROSS THE PACNW THIS AFTERNOON,
EXPECTING TO LINGER THROUGH EARLY NEXT WEEK. ENSEMBLE MODELS,
INCLUDING CLUSTER ANALYSIS, ARE IN VERY GOOD AGREEMENT THAT THE
RIDGE WILL BUILD TEMPERATURES 10-15 DEGREES ABOVE SEASONAL
AVERAGE (75-95% CHANCE) WITH HIGH TEMPERATURES CLIMBING INTO
THE UPPER 70S/LOW 80S BY MONDAY. THIS WILL TRIGGER SOME
INSTABILITY IN THE ATMOSPHERE WITH 150-250 J/KG OF CAPE TO
DEVELOP BY MONDAY AFTERNOON. A WEAK TROUGH/SHORTWAVE IS EXPECTED
TO PASS THROUGH WASHINGTON INTO THE IDAHO/MONTANA REGION BY MID
TO LATE MONDAY, ALLOWING FOR SLIGHT CHANCES (5-15%) OF MOUNTAIN
SHOWERS AND THUNDERSTORMS TO DEVELOP MONDAY AND TUESDAY. MOST
OF THE ACTIVITY WILL BE CONFINED TO THE CASCADE CRESTS AND ALONG
THE BLUE MOUNTAIN REGION. A WEAK TO MODERATE COLD FRONT IS
EMBEDDED WITH THE SHORTWAVE PASSAGE, ALLOWING BREEZY WINDS TO
DEVELOP ACROSS THE REGION TUESDAY. NBM ADVERTISES 30-50% CHANCES
OF WINDS EXCEEDING >45 MPH GUSTS BY TUESDAY EVENING, WHILE
SETTLING DOWN BY WEDNESDAY MORNING.
THE PATTERN BECOMES A BIT UNCERTAIN REGARDING PRECIP CHANCES
WITH AN UPPER-LOW DEVELOPING OFF IN THE PACIFIC AND MOVING
ONSHORE SOMETIME THURSDAY/FRIDAY. LREF CLUSTERS HAVE MOST
MEMBERS BRINGING THE LOW INTO NORTHERN CALIFORNIA, KEEPING THE
BLUNT OF PRECIP CHANCES TO THE SOUTH. MOST OF THE PRECIP/RAIN
CHANCES LOOK TO BE SETTLED IN CENTRAL OREGON, EXTENDING UP INTO
THE BLUE MOUNTAIN REGION. EXACT TIMING AND POSITION OF THE LOW
WILL DETERMINE IF WE'LL SEE ANOTHER WET PATTERN LATE NEXT-WEEK
IN THE HIGHER ELEVATIONS (MORE SOUTHERN PATH WILL RESULT IN
DRIER CONDITIONS, WITH WETTER CONDITIONS IN A MORE NORTHERN
PATH). OTHERWISE, NOT SEEING ANYTHING TO BE HIGHLIGHT WORTHY AT
THIS TIME.
AVIATION /06Z TAFS THROUGH 06Z MONDAY/
VFR CONDITIONS ARE EXPECTED THROUGH SUNDAY. WINDS WILL GENERALLY
BE LESS THAN 10 KTS.
PRELIMINARY POINT TEMPS/POPS
PDT 41 72 45 76 / 0 0 0 0
ALW 45 72 49 74 / 0 0 0 0
PSC 41 74 46 80 / 0 0 0 0
YKM 43 72 46 78 / 0 0 0 0
HRI 41 73 45 79 / 0 0 0 0
ELN 40 68 44 73 / 0 0 0 0
RDM 36 74 39 75 / 0 0 0 0
LGD 38 69 42 74 / 0 0 0 10
GCD 38 71 42 73 / 0 0 0 10
DLS 46 74 49 78 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...77
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