579
FXUS66 KPDT 210514
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1014 PM PDT WED MAY 20 2026
KEY MESSAGES
- DRY CONDITIONS WILL CONTINUE THROUGH EARLY NEXT WEEK.
- WARMING TREND CONTINUES THROUGH THE WEEKEND.
- BREEZIER/WETTER CONDITIONS EARLY NEXT WEEK WITH A COLD FRONTAL
PASSAGE.
DISCUSSION
A RIDGE WILL BE SITUATED JUST OFF THE COAST OF
THE PACNW, BRINGING SUBSIDENCE ACROSS THE REGION. TEMPERATURES
WILL CONTINUE TO TREND WARMER AS A RESULT THROUGH THE WEEKEND,
WHERE HIGHS WILL WARM TO THE MID TO HIGH 80S BY SATURDAY
AFTERNOON. HEATRISK VALUES ARE LIMITED TO 1 ACROSS THE REGION
WHICH WILL HAVE A CHANCE TO AFFECT THE MOST SUSCEPTIBLE
POPULATION WHO HAVE NO ACCESS TO COOLING OR HYDRATION.
A PATTERN CHANGE WILL EMERGE GOING INTO MONDAY & TUESDAY AS THE
UPPER LEVEL RIDGE MOVES EAST. AT THE SAME TIME, A TROUGH WILL
DIG DOWN FROM BRITISH COLOMBIA INTO THE PACNW, BRINGING UNSTABLE
WETTER CONDITIONS AND ENDING THE WARM TREND WE WILL SEE THROUGH
THIS WEEK. MAJORITY OF THE CLUSTERS (86 PERCENT OF MEMBERS)
PAINT A SIMILAR PATTERN OF BROAD LIGHT TO MODERATE SHOWERS
ACROSS THE REGION THROUGH DAYS 5-7. THE BIGGEST STRUGGLE THE
CLUSTERS ARE FACING IS THE TIMING OF THE TROUGH APPROACHING THE
AREA. AN ACCOMPANIED COLD FRONT WILL PASS THROUGH MONDAY,
BRINGING TIGHT PRESSURE GRADIENTS ACROSS THE REGION. THIS WILL
RESULT IN STRONGER, BREEZIER WINDS ACROSS THE REGION WITH NO
ANTICIPATED WIND HIGHLIGHTS OUT OF THIS SYSTEM. HOWEVER, STRONG
WESTERLY WINDS WILL RETURN JUST PRECEDING THE COLD FRONT
BRINGING STRONG, BREEZY CONDITIONS ACROSS PLACES LIKE THE
KITTITAS VALLEY (60 TO 80 PERCENT CHANCE).
AVIATION /06Z TAFS THROUGH 06Z FRIDAY/
VFR CONDITIONS TO
PREVAIL THROUGH THE PERIOD. WINDS WILL BE LIGHT, 112KTS OR LESS,
WITH DIURNALLY DRIVEN WIND SHIFTS. EXCEPTIONS WILL BE SITES
RDM/BDN WHERE GUSTS UP TO 20KTS WILL DEVELOP BETWEEN 20-02Z.
LAWHORN/82
PRELIMINARY POINT TEMPS/POPS
PDT 45 75 47 80 / 0 0 0 0
ALW 48 76 50 80 / 0 0 0 0
PSC 50 80 50 85 / 0 0 0 0
YKM 49 80 52 84 / 0 0 0 0
HRI 48 79 49 83 / 0 0 0 0
ELN 44 74 47 79 / 0 0 0 0
RDM 39 77 41 81 / 0 0 0 0
LGD 41 72 43 77 / 0 0 0 0
GCD 39 75 40 80 / 0 0 0 0
DLS 50 82 54 85 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...82
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