414
FXUS66 KPDT 241304
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
504 AM PST WED DEC 24 2025
KEY MESSAGES
- MOUNTAIN PASS SNOW THROUGH CHRISTMAS EVE WITH A RETURN OF
MOUNTAIN PASS SNOWS THURSDAY NIGHT AND FRIDAY
- WIDESPREAD BREEZY TO WINDY CONDITIONS WITH HIGH WINDS
IMPACTING THE FOOTHILLS OF THE BLUE MOUNTAINS TODAY.
DISCUSSION
DEEP TROUGH OVER THE EASTERN PACIFIC, WITH A DEVELOPING SURFACE
LOW ALONG THE NRN CA COAST AS OF 10Z. THE SHORTWAVE/COASTAL LOW IS
FORECAST TO LIFT NORTHWARD THIS MORNING ALONG THE OREGON AND
WASHINGTON COAST BY LATE INN THE DAY LIFTING A WARM FRONT ACROSS
OREGON WITH RAIN SHOWERS AND STRONG GUSTY WINDS INTO CENTRAL
OREGON AND INTO THE SOUTHERN BLUE MOUNTAINS. HAVE HOISTED WIND
ADVISORIES FOR CENTRAL OREGON, NORTH-CENTRAL OREGON AND SIMCOE
HIGHLANDS , JOHN DAY BASIN AND OCHOCO-JOHN DAY HIGHLANDS ZONES.
THESE WILL NOT ALL START AT THE SAME TIME AS THE MOMENTUM TRANSFER
WORKS IT WAY NORTHWARD THROUGH THE MORNING AND COLD FRONT SWEEPS
IN FROM THE WEST BY THE AFTERNOON ASSOCIATED WITH THE COASTAL LOW
PRESSURE. EXPECTED SNOW AMOUNTS ARE IN THE 1 TO 2 INCH RANGE AT
THE PASS LEVELS FOR TODAY, AND WITH THE WINDY CONDITIONS THIS CAN
CAUSE SOME RESTRICTED VISIBILITY AND SLICK CONDITIONS IN THOSE
AREAS. MINIMAL SNOW IN THE MOUNTAINS IS ANTICIPATED ON CHRISTMAS
DAY, BUT AN UP TICK ON THURSDAY NIGHT AND FRIDAY IS POSSIBLE AS
THE EXPECTED NBM SNOWFALL UP IN THE WA CASCADE PASSES AS WELL AS
SANTIAM PASS RANGE FROM 2 TO 4 INCHES. DRY CONDITIONS DEVELOP
REGION WIDE FOR THE WEEKEND AND INTO EARLY NEXT WEEK AND THE NEXT
OPPORTUNITY FOR MOUNTAIN SHOWERS RETURNS BY ABOUT WEDNESDAY.
AVIATION
A WARM FRONT WAS LIFTING OVER THE REGION THIS MORNING DUE TO A
DEEPENING COASTAL LOW IS BRINGING A VARIETY OF CEILINGS AND FOG
ISSUES THIS MORNING AS WELL AS THE THREAT OF WINDY TO HIGH WIND
CONDITIONS THROUGH THE REST OF THE DAY. LOOK FOR WIND GUSTS AS
HIGH AS 45KTS AT PDT RDM BDN WITH STILL BREEZY SOUTH WINDS
ELSEWHERE. IFR TO LIFR CIGS WILL BE A CHALLENGE FOR MOST OF THE
DAY.
PRELIMINARY POINT TEMPS/POPS
PDT 54 34 50 34 / 20 10 30 30
ALW 55 38 49 36 / 30 20 50 50
PSC 51 32 45 33 / 30 10 30 30
YKM 46 29 44 30 / 70 10 40 30
HRI 51 33 47 33 / 20 10 30 40
ELN 41 26 39 26 / 80 10 60 40
RDM 53 28 50 28 / 30 30 10 20
LGD 51 38 49 36 / 40 30 50 50
GCD 53 36 50 35 / 50 40 60 60
DLS 48 36 45 36 / 70 20 60 40
PDT WATCHES/WARNINGS/ADVISORIES
OR...HIGH WIND WARNING UNTIL 2 PM PST THIS AFTERNOON FOR ORZ049-050-
507-508.
WIND ADVISORY UNTIL 4 PM PST THIS AFTERNOON FOR ORZ505-506-511.
WIND ADVISORY FROM 10 AM THIS MORNING TO 6 PM PST THIS EVENING
FOR ORZ510.
WA...HIGH WIND WARNING UNTIL 2 PM PST THIS AFTERNOON FOR WAZ029.
WIND ADVISORY FROM 10 AM THIS MORNING TO 6 PM PST THIS EVENING
FOR WAZ521.
DENSE FOG ADVISORY UNTIL 6 AM PST EARLY THIS MORNING FOR WAZ029.
SHORT TERM...99
LONG TERM....99
AVIATION...71
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