698
FXUS66 KPDT 080453
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
853 PM PST SAT FEB 7 2026
KEY MESSAGES
- FOG LIFTS WITH THE FRONTAL SYSTEM MOVING INLAND OF THE PACNW TODAY.
- FRONTAL SYSTEM WILL CONTINUES ACROSS THE REGION THROUGH MONDAY
WITH LIGHT MOUNTAIN SNOW, LOW ELEVATION RAIN AND BREEZY WINDS.
- PLUME OF MOISTURE MAY DEVELOP TUESDAY THROUGH THURSDAY FOR
DESCHUTES COUNTY AND EASTERN OR MOUNTAIN.
DISCUSSION
CURRENT SATELLITE AND RADAR IMAGERY SHOW THE FRONTAL
SYSTEM MOVING ACROSS OUR FORECAST AREA WITH INCREASED CLOUD
COVERAGE. WITH THE HELP OF THIS SYSTEM, FOG HAS BEEN LIFTED FOR THE
FOOTHILLS-NORTHERN BLUE MOUNTAINS OF OR AND PORTIONS OF KITTITAS
VALLEY (RYEGRASS SUMMIT AND MANASTASH RIDGE). FOG WILL BE LESS
LIKELY (<20%) TO RETURN THROUGH OVERNIGHT HOURS FOR MOST LOCATIONS,
BUT COULD LAST THROUGH OVERNIGHT FOR THE UPPER PARTS OF THE WA
CASCADES.
PRECIP ACTIVITY WILL CONTINUE THROUGH MONDAY WITH TODAY'S RIDGE
BREAKDOWN AND SUNDAY'S SHORTWAVE. STORMTOTALQPF AMOUNTS WILL EXCEED
TO 0.60 INCHES FOR THE LOWER ELEVATION AND 1 INCH OR MORE FOR THE
MOUNTAIN AREAS. THE NBM PROBABILITY OF 24 HR PRECIPITATION SUGGESTED
A 20-40% PROB OF 0.60 INCH OR MORE, BUT 50-70% PROB FOR 1 INCH OR
MORE FOR OR CASCADES AND NORTHWEST BLUE MOUNTAINS. THE WA CASCADES
MAY SEE PRECIP OF 0.70 INCH (20-40% PROB), BUT CHANCES THEN
DECREASES PAST THAT. WITH NACHES RIVER ELEVATED TO ACTION STAGE,
THIS COULD ALSO POTENTIALLY RAISE OTHER RIVER LEVELS.
LIGHT MOUNTAIN SNOW MIGHT ACCUMULATE UP TO 1 INCH OR MORE OVER
THE WA/OR CASCADES AND SOUTHERN PARTS OF WALLOWA COUNTY SUNDAY
THROUGH EARLY MONDAY MORNING (30-70% PROB). SNOW LEVELS WILL
DROP FROM 5 KFT SUNDAY TO 2.9-3.7 KFT MONDAY. PORTIONS OF THE
EASTERN MOUNTAINS (GRANDE RONDE VALLEY, SOUTHERN BLUE MOUNTAINS-
OR, AND JOHN DAY HIGHLANDS) AND NORTHWEST BLUES WILL REMAIN
SEEING LESS THAN 0.5 INCH. IN ADDITION TO THE FRONTAL SYSTEM,
BREEZY TO WINDY WINDS (GUSTS OF 20-30 MPH) WILL DEVELOP LATE
SUNDAY MORNING INTO EARLY MONDAY MORNING ACROSS DESCHUTES COUNTY
THROUGH EASTERN OR MOUNTAINS (50% CONFIDENCE). NBM SUGGEST A
20-40% PROB FOR GUST EXCEEDING 25 MPH.
WITH THE TROUGH ARRIVING TO THE PACNW, DRY CONDITIONS WILL
RETURN FOR MOST OF OUR FORECAST AREA TUESDAY THROUGH THURSDAY.
HOWEVER, A PLUME OF MOISTURE MAY DEVELOP TUESDAY OVERNIGHT
THROUGH EARLY THURSDAY MORNING FOR THE DESCHUTES COUNTY AND
EASTERN OR MOUNTAINS. THIS COULD BRING LIGHT RAIN, BUT
CONFIDENCE IS LOW FOR RIGHT NOW (<30%). FEASTER/97
AVIATION /06Z TAFS THROUGH 06Z MONDAY/
RAIN CHANCES RAMP UP TO ABOVE 90% ACROSS THE BDN AND RDM AREAS
BEFORE 12Z WHILE RAIN CHANCES INCREASE TO 80% AT MOST OF THE
OTHER TERMINALS THROUGH EARLY AFTERNOON SUNDAY. AS FOR LOCAL
IMPACTS, THE CEILINGS WILL BE REDUCES, BUT THE GUIDANCE DOES NOT
POINT TO LIFR OR WORSE CONDITIONS. MODEL ENSEMBLE PROBABILISTIC
STATS SUGGEST CAPPING THE CHANCES FOR SUB 1,000 FT CEILINGS TO
AT 50% AND CHANCES FOR SUB 500 FT CIGS ARE EVEN LOWER. THE DLS
TERMINAL MIGHT BE THE OUTLIER WITH ABOUT A 40 TO 50 % CHANCE FOR
CEILINGS BELOW 500FT. LIKEWISE YKM MIGHT WILL BE IMPROVING OVER
THE COURSE OF THE NIGHT. RUSSELL/71
PRELIMINARY POINT TEMPS/POPS
PDT 42 52 36 49 / 70 90 80 20
ALW 45 51 38 49 / 80 90 90 40
PSC 41 49 36 55 / 60 90 60 10
YKM 37 46 31 49 / 50 70 30 0
HRI 42 50 37 53 / 60 90 70 20
ELN 34 41 30 44 / 60 60 40 10
RDM 38 49 27 47 / 60 90 40 0
LGD 41 48 35 45 / 80 100 90 50
GCD 42 50 33 44 / 60 90 80 20
DLS 43 49 38 52 / 90 90 60 20
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...97
AVIATION...71
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