081
FXUS66 KPDT 031128
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
428 AM PDT FRI APR 3 2026
KEY MESSAGES
- ABOVE-NORMAL TEMPERATURES THIS WEEKEND INTO EARLY NEXT WEEK.
DISCUSSION
AN UPPER-LEVEL RIDGE IS BUILDING OVER THE PACIFIC NORTHWEST
EARLY THIS MORNING. TEMPERATURES WILL BE NEAR NORMAL TODAY, BUT
CONFIDENCE IS VERY HIGH (95 PERCENT) THAT THEY WILL WARM TO
ABOVE NORMAL THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK AS THE
RIDGE REMAINS OVERHEAD. WIDESPREAD 70S ARE ADVERTISED BY THE NBM
FOR SUNDAY AND MONDAY, AND THERE IS A MEDIUM-HIGH (40-70
PERCENT) CHANCE THE YAKIMA VALLEY AND LOWER COLUMBIA BASIN WILL
REACH 80 DEGREES MONDAY.
DRY CONDITIONS ARE EXPECTED (95 PERCENT CONFIDENCE) UNDER THE
RIDGE THROUGH THE WEEKEND, BUT GUIDANCE IS SHOWING LOW (10-20
PERCENT) CHANCES OF SHOWERS AND VERY LOW (5-10 PERCENT) CHANCES
OF THUNDERSTORMS MONDAY AS A WEAK SHORTWAVE WRIGGLES INTO THE
PACIFIC NORTHWEST AND INTERACTS WITH WHAT LONG-RANGE CAMS ARE
SHOWING AS A WEAKLY UNSTABLE ENVIRONMENT (MUCAPE <500 J/KG) OVER
THE MOUNTAINS (PRIMARILY THE BLUES).
THERE IS SIGNIFICANT UNCERTAINTY IN PATTERN DETAILS TUESDAY
ONWARD. TO GIVE A BROAD OVERVIEW, ENSEMBLE GUIDANCE GENERALLY
DEPICTS A CLOSED LOW IN THE PACIFIC APPROACHING THE OR/CA COAST
WHILE A SECOND CLOSED LOW AND SECONDARY SHORTWAVE TROUGH DIVE
DOWN FROM CANADA ACROSS EITHER THE NORTHERN TIER (ROUGHLY 50
PERCENT OF MEMBERS) OR FARTHER SOUTH INTO THE PACIFIC NORTHWEST
(ROUGHLY 50 PERCENT OF MEMBERS). TEMPERATURES WOULD BE NEAR OR
BELOW NORMAL SHOULD THE LATTER SCENARIO MATERIALIZE. RIGHT NOW,
WINDS ON TUESDAY ARE THE BEST CHANCE OF A HEADLINE-WORTHY EVENT.
THE NBM SUGGESTS A LOW-MEDIUM (20-50 PERCENT) CHANCE OF
REACHING OR EXCEEDING ADVISORY-LEVEL WIND GUSTS (45 MPH OR
GREATER) THROUGH THE CASCADE GAPS AND ACROSS WIND-PRONE
PORTIONS OF THE COLUMBIA BASIN AND SURROUNDING LOWLANDS.
AVIATION /12Z TAFS THROUGH 12Z SATURDAY/
VFR CONDITIONS WITH WINDS OF 12 KTS OR LESS ARE FORECAST FOR ALL
SITES OVER THE NEXT 24 HOURS.
PRELIMINARY POINT TEMPS/POPS
PDT 60 35 68 40 / 0 0 0 0
ALW 59 40 67 44 / 0 0 0 0
PSC 63 36 70 40 / 0 0 0 0
YKM 62 35 68 41 / 0 0 0 0
HRI 63 36 70 40 / 0 0 0 0
ELN 57 32 64 39 / 0 0 0 0
RDM 62 28 71 35 / 0 0 0 0
LGD 57 32 66 38 / 0 0 0 0
GCD 58 32 67 36 / 0 0 0 0
DLS 64 40 71 44 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...86
AVIATION...86
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