556
FXUS66 KPDT 120006
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
506 PM PDT WED MAR 11 2026
UPDATED AVIATION DISCUSSION
KEY MESSAGES
1. HEAVY SNOW TUESDAY NIGHT INTO FRIDAY MORNING
WINTER STORM WARNING IN EFFECT 5 PM TUESDAY NIGHT THROUGH 5 AM
FRIDAY MORNING
2. MODERATE SNOW CONTINUING THROUGH THIS EVENING
WINTER WEATHER ADVISORY FOR LOWER SLOPES OF THE E. WA CASCADES AND
THE NORTHERN BLUES OF WASHINGTON AM THIS MORNING TO 8 PM PDT THIS
EVENING ABOVE 3000 FEET AND WINTER WEATHER ADVISORY FOR THE LOWER
SLOPES OF THE OR CASCADES REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON ABOVE 4500 FEET
3. BREEZY WINDS WILL PERSIST THROUGH THE WEEK
HIGH WIND WARNING IN EFFECT 5 PM WEDNESDAY THROUGH 11 AM THURSDAY
DISCUSSION
CURRENT RADAR SHOWS RETURNS MOVING ACROSS THE CASCADES OVER
SNOQUALMIE PASS THROUGH HYAK AND INTO EASTON. CURRENT WEBCAMS SHOWS
MODERATE SNOWFALL OCCURRING THROUGH THE AFOREMENTIONED AREAS.GROUND
OBSERVATIONS AT BUMPING RIDGE SHOWS 9 INCHES OF SNOWFALL AND HYAK
HAS REPORTED 7.5 INCHES AND 12 INCHES JUST NORTH OF EASTON SINCE
THIS MORNING. A SHORT LULL IN MODERATE/HEAVY PRECIPITATION WILL
OCCUR BETWEEN NOW AND EARLY TUESDAY MORNING BEFORE THE COLD FRONT
MOVES ACROSS THE WA CASCADES CAUSING THE SNOW LEVELS TO DROP BACK
DOWN TO BELOW 2000 FEET. A RAIN/SNOW MIX WILL CONTINUE DURING THE
BRIEF LULL WITH 40-60% CONFIDENCE ONLY 2 INCHES WILL ACCUMULATE AHEAD
OF THE NEXT ROUND. THE NEXT SURGE FROM THIS SYSTEM WILL BRING
EXPECTED AMOUNTS OF 1-2 ADDITIONAL FEET WITH 60-80% OF THE NBM RAW
ENSEMBLES IN AGREEMENT.
WINTER WEATHER ADVISORIES ARE IN EFFECT THROUGH 5 PM FOR THE LOWER
EAST SLOPES OF THE OR CASCADES THROUGH 5 PM FOR AN ADDITIONAL SNOW
ACCUMULATION OF 2 TO 5 MORE INCHES ON TOP OF THE RECORDED 8 INCHES
SINCE 10 AM THIS MORNING (60-80% CONFIDENCE). A WINTER WEATHER
ADVISORY IS ALSO IN EFFECT FOR THE LOWER SLOPES OF THE EASTERN
WASHINGTON CASCADES CREST FOR AN ADDITIONAL 2-4 INCHES OF SNOW
ACCUMULATION THROUGH 8 PM THIS EVENING. NBM RAW ENSEMBLES SHOW 60-
80% CONFIDENCE IN ANOTHER 2-4 INCHES FOR BOTH THE OR CASCADES AND
40-60% CONFIDENCE IN 3-5 INCHES FOR THE NORTHERN BLUES.
A HIGH WINDS WARNING WILL GO INTO EFFECT AFTER 5 PM WEDNESDAY NIGHT
AND REMAIN THROUGH 11 AM THURSDAY FOR THE: LOWER COLUMBIA BASIN OF
OREGON-FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON-FOOTHILLS
OF THE SOUTHERN BLUE MOUNTAINS OF OREGON-NORTH CENTRAL OREGON-LOWER
COLUMBIA BASIN OF WASHINGTON-FOOTHILLS OF THE BLUE MOUNTAINS OF
WASHINGTON. SOUTHWEST WINDS OF 25 TO 35 MPH SUSTAINED WITH GUSTS UP
TO 60 MPH EXPECTED WITH 70-80% CONFIDENCE. 90
AVIATION /00Z TAFS THROUGH 00Z THURSDAY
VFR CONDITIONS PREVAIL
FOR ALL SITES. LIGHT RAIN SHOWERS ARE FORECASTED FOR MOST SITES THIS
EVENING AND DURING THE DAY THURSDAY. KRDM/KBDN MAY SEE LIGHT RAIN
WITH LOW CLOUDS (2.5 KFT OR LOWER) THURSDAY MORNING INTO AFTERNOON
(30% PROBABILITY).
BREEZY TO WINDY CONDITIONS (25-45 KTS) WILL CONTINUE FOR ALL SITES
THIS EVENING THROUGH THE DAY THURSDAY. CONFIDENCE IS MODERATE TO
HIGH (50-70%) FOR GUSTS EXCEEDING 40 KTS PAST 11 PM PDT, BUT WILL
MONITOR IT IN CASE FOR AN EXTENSION. LLWS MAY ALSO DEVELOP FOR
KPDT/KRDM/KBDN/KALW BETWEEN 03Z AND 08Z TONIGHT. FEASTER/97
PRELIMINARY POINT TEMPS/POPS
PDT 43 53 38 52 / 50 80 90 80
ALW 44 53 39 50 / 80 80 90 90
PSC 46 57 39 54 / 30 40 60 70
YKM 39 52 33 52 / 80 50 50 70
HRI 46 55 40 53 / 40 60 70 70
ELN 35 44 32 44 / 90 60 60 70
RDM 39 56 39 57 / 30 50 40 30
LGD 41 48 41 53 / 90 100 100 90
GCD 43 53 43 57 / 30 70 70 50
DLS 42 50 40 53 / 90 90 80 80
PDT WATCHES/WARNINGS/ADVISORIES
WA...HIGH WIND WARNING FROM 5 PM THIS AFTERNOON TO 11 AM PDT
THURSDAY FOR WAZ026-028-029-521.
WINTER WEATHER ADVISORY UNTIL 8 PM PDT THIS EVENING FOR WAZ030-
523.
WINTER STORM WARNING UNTIL 5 AM PDT FRIDAY FOR WAZ522.
OR...HIGH WIND WARNING FROM 5 PM THIS AFTERNOON TO 11 AM PDT
THURSDAY FOR ORZ044-507-508-510.
WINTER WEATHER ADVISORY UNTIL 5 PM PDT THIS AFTERNOON FOR
ORZ509.
DISCUSSION...90
AVIATION...97
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