027
FXUS66 KPDT 202314
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
414 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 /00Z TAFS THROUGH 00Z FRIDAY/
VFR CONDITIONS WILL PERSIST THROUGH THE FORECAST PERIOD. CIGS
REMAIN FEW/SCT TO SKC THROUGH THE PERIOD WITH MOSTLY LIGHT
WINDS UNDER 10 KTS. DLS/BDN IS GUSTING TO NEAR 15 KTS AND WILL
DECREASE AFTER 6Z AND 9Z RESPECTIVELY. 90
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 49 85 / 0 0 0 0
YKM 49 80 51 85 / 0 0 0 0
HRI 48 79 48 83 / 0 0 0 0
ELN 44 75 47 79 / 0 0 0 0
RDM 39 77 41 82 / 0 0 0 0
LGD 41 73 42 78 / 0 0 0 0
GCD 39 75 39 81 / 0 0 0 0
DLS 50 82 53 86 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...90
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