988
FXUS66 KPDT 241744
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
944 AM PST SAT JAN 24 2026
UPDATE FOR AVIATION
AVIATION
18Z TAFS...VFR CONDITIONS ARE EXPECTED IN MOST AREAS TODAY, THOUGH
BDN AND RDM ARE STILL EXPERIENCING SOME REDUCED CIGS. IMPROVEMENT
AT THOSE TWO SITES IS POSSIBLE LATER IN THE DAY AS WELL.
PREV DISCUSSION
/ISSUED 313 AM PST SAT JAN 24 2026/
UPDATED AVIATION.
AVIATION...12Z TAFS...VFR CONDITIONS PREVAIL FOR ALL SITES
EXCEPT CENTRAL OR (BDN/RDM) WHERE STRATUS CONTINUES TO BRING <1500
FEET OF CIGS. CIGS ARE EXPECTED TO IMPROVE TO VFR BY 17Z. WINDS
OTHERWISE REMAIN LIGHT AND VARIABLE THROUGH THE PERIOD.
PREV DISCUSSION... /ISSUED 306 AM PST SAT JAN 24 2026/
KEY POINTS...
1. A HIGH PRESSURE RIDGE WILL DOMINATE THROUGH MID-WEEK
2. FOG/STRATUS WILL BE THE MAIN CONCERN
3. AN UPPER LEVEL SYSTEM MID-WEEK COULD CLEAR THE AREA OF STAGNANT
CONDITIONS TEMPORARILY.
DISCUSSION...CURRENT SATELLITE SHOWS THE STRATUS LAYER BEGINNING TO
ERODE FROM NORTH TO SOUTH WITH MANY BASIN AND ADJACENT VALLEY
LOCATIONS REPORTING CLEAR SKIES. THE DRY NORTHWEST FLOW ALOFT WILL
CONTINUE TO SLOWLY ERODE THE STRATUS DECK, HOWEVER, FOG WILL LIKELY
RETURN ACROSS MANY LOCATIONS EARLY THIS MORNING.
MODELS SHOW THE RIDGE TO CONTINUE TO BUILD IN OVER THE REGION WHICH
WILL BRING BACK THE STRATUS DECK AS WELL AS THE FOG. RAW ENSEMBLES
SHOW 10-20% CHANCES OF PATCHY FOG RETURNING TO MUCH F THE AREA BY
MORNING WITH AREAS ALONG THE I-84 CORRIDOR OF THE BLUES SEEING 30-
40% PROBABILITIES OF SEEING 5 MILE OR LESS IN VISIBILITY THROUGH THE
MORNING. HREF SHOWS THAT THE STRATUS DECK WILL AGAIN REFORM,
ESPECIALLY ALONG THE FOOTHILLS OF THE BLUES AND THROUGH PORTIONS OF
CENTRAL AND NORTH-CENTRAL OR AGAIN THROUGH TOMORROW. IN OTHER WORDS,
THE COLD POOL WILL CONTINUE TO PLAGUE THE REGION THROUGH AT LEAST
MID-WEEK.
MODELS SHOW THAT BY WEDNESDAY MORNING AN UPPER LEVEL TROUGH WILL
FORM OFF THE COAST OF THE PACNW WHICH WILL BRING IN SLIGHT CHANCES
(15-30%) OF LIGHT MOUNTAIN PRECIPITATION AND ASSIST WITH PUSHING THE
COLD POOL OUT OF THE REGION. HOWEVER, LOOKING AT THE 700 MB WIND
SPEEDS COUPLE WITH THE OMEGA FIELD, CONFIDENCE THAT THIS SYSTEM WILL
COMPLETELY ERODE THE COLD POOL IS LOW/MODERATE (30-50% CONFIDENCE).
THIS IN PART DUE TO THE MODELS SHOWING THE 700 MB WINDS SPEEDS TO BE
BELOW 25 KTS AND THE OMEGA FIELD ONLY SHOWING -7 UBAR, WHICH IMPLIES
THAT MIXING WILL NOT BE VERY STRONG. WITH THAT SAID, WE COULD SEE
SOME CLEARING OF THE STRATUS DECK ACROSS SOME AREAS, BUT IT WILL
LIKELY BE SHORT LIVED AS MODELS SHOW YET ANOTHER HIGH PRESSURE RIDGE
PUSHING INLAND BY FRIDAY. 90
PRELIMINARY POINT TEMPS/POPS
PDT 28 23 29 21 / 0 0 0 0
ALW 30 23 31 24 / 0 0 0 0
PSC 33 25 33 22 / 0 0 0 0
YKM 30 25 30 21 / 0 0 0 0
HRI 32 25 32 22 / 0 0 0 0
ELN 27 23 27 19 / 0 0 0 0
RDM 29 20 31 21 / 0 0 0 0
LGD 30 23 31 24 / 0 0 0 0
GCD 28 21 30 24 / 0 0 0 0
DLS 34 27 34 26 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
SHORT TERM...90
LONG TERM....90
AVIATION...77
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page