455
FXUS66 KPDT 140005
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
505 PM PDT FRI JUN 13 2025
.UPDATED AVIATION DISCUSSION.
AVIATION...00Z TAFS
VFR CONDITIONS CURRENTLY ACROSS ALL SITES,
WHICH WILL STAY THE COURSE THROUGH THE PERIOD. THERE ARE ACTIVE
WILDFIRES IN THE VICINITY OF KDLS/KPDT/KALW/KPSC, BUT CONFIDENCE IN
THE TIMING AND SEVERITY OF SMOKE RELATED VISIBILITY REDUCTIONS ARE
TOO LOW AT THIS TIME TO INCLUDE IN THE TAF. A WEAK SYSTEM WILL BRING
A SLIGHT CHANCE (30-50%) OF A PASSING SHOWER OVER MOST TERMINALS
EXCEPT KYKM/KDLS THROUGH THE EVENING. BREEZY WINDS WILL ALSO PERSIST
AT KDLS/KPDT/KRDM/KBDN WITH GUSTS OF 20-30KTS THIS EVENING BEFORE
DISSIPATING OVERNIGHT INTO SATURDAY MORNING. 75
PREV DISCUSSION
/ISSUED 125 PM PDT FRI JUN 13 2025/
SHORT TERM...
TONIGHT THROUGH SUNDAY NIGHT...SOUTHWESTERLY FLOW WILL PREVAIL
OVER THE REGION THROUGH THE SHORT TERM PERIOD. SEVERAL WEAK
DISTURBANCES WILL MOVE THROUGH THE FLOW OVER THE WEEKEND.
ANY LINGERING PRECIPITATION OVER THE EASTERN OREGON MOUNTAINS
SHOULD COME TO AN END THIS EVENING.
DRY CONDITIONS ARE EXPECTED THROUGH THE PERIOD. HOWEVER, SOME
GUIDANCE IS SUGGESTING SHOWERS OR EVEN A FEW THUNDERSTORMS OVER
THE EASTERN MOUNTAINS ON SUNDAY. AT THIS TIME, PROBABILITIES ARE
VERY LOW (15%) BUT WILL NEED TO SEE IF CHANCES INCREASE OVER THE
NEXT DAY OR TWO.
BREEZY WINDS THROUGH THIS EVENING WILL DECREASE THROUGH THE
WEEKEND, THOUGH THERE WILL STILL BE SOME BREEZY LOCATIONS
SATURDAY, ESPECIALLY ALONG THE CASCADE GAPS.
RH VALUES ARE EXPECTED TO REMAIN IN THE 15 TO 20 PERCENT RANGE IN
MANY OF THE LOWER ELEVATION AREAS THROUGH THE WEEKEND.
LONG TERM...
MONDAY THROUGH FRIDAY...ANOTHER WEAK DISTURBANCE/TROUGH MOVES
ACROSS THE AREA ON MONDAY. THIS SYSTEM WILL BRING SOME RAIN TO THE
CASCADES INTO TUESDAY WHILE THE REST OF THE REGION REMAINS DRY.
ZONAL FLOW THEN DEVELOPS INTO WEDNESDAY, FOLLOWED BY A RETURN TO
SOUTHWEST FLOW THURSDAY INTO FRIDAY. BY THE END OF THE EXTENDED
PERIOD, A LARGE LOW AND TROUGH IS APPROACHING THE PACIFIC
NORTHWEST.
GUSTY WINDS ARE EXPECTED TO REDEVELOP MONDAY AFTERNOON AND THEN
AGAIN WEDNESDAY AND BY THE END OF THE WEEK WITH THE APPROACH OF
THE UPPER LOW/TROUGH. WINDS WILL GENERALLY GUST IN THE 25 TO 35
MPH RANGE IN THE CASCADE GAPS, GORGE, PORTIONS OF THE BASIN,
KITTITAS VALLEY. ON MONDAY, THE NBM PROBABILITIES OF WIND GUSTS
>=39 MPH ARE GENERALLY 50 TO 70 PERCENT IN THESE AREAS AND A BIT
HIGHER IN THE KITTITAS VALLEY. ON WEDNESDAY, THE VALUES ARE
SLIGHTLY LOWER, ABOUT 40 TO 60 PERCENT.
HIGH TEMPERATURES LOOK TO BE NEAR NORMAL THROUGH WEDNESDAY THEN
ABOUT 5 DEGREES BELOW NORMAL TOWARD THE END OF THE WEEK.
PRELIMINARY POINT TEMPS/POPS
PDT 49 81 52 85 / 10 0 0 0
ALW 53 80 56 85 / 20 0 0 10
PSC 50 83 52 88 / 10 0 0 0
YKM 49 83 51 87 / 0 0 0 0
HRI 49 84 52 88 / 10 0 0 0
ELN 49 80 51 85 / 0 0 0 0
RDM 36 78 42 82 / 0 0 0 0
LGD 46 78 51 81 / 20 0 0 0
GCD 43 81 50 83 / 0 0 0 0
DLS 49 80 52 86 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
SHORT TERM...77
LONG TERM....77
AVIATION...75
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