782
FXUS66 KPDT 191127
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
427 AM PDT SAT SEP 19 2026
KEY MESSAGES
- WARMING AND DRIER TREND CONTINUES THROUGH THE BEGINNING OF THE
WEEK, WITH HIGHS TRENDING UP TOWARDS THE LOW TO MID 80S.
- COOLER, WETTER PATTERN POSSIBLE THROUGH THE LATER PART OF THE
WEEK WITH SOME UNCERTAINTY WITH SPECIFICS.
- LIGHT TO SLIGHTLY ELEVATED DIURNAL WINDS THROUGH THE WEEK.
DISCUSSION
DRY AND MOSTLY CLEAR TO PARTLY CLOUDY CONDITIONS THROUGH THE
AREA ARE CONTINUED TO BE ADVERTISED THROUGH SATELLITE AND RADAR.
THE UPPER LEVEL LOW HAS PUSHED OFF TO THE EAST OVER THE
IDAHO/MONTANA REGION, ALLOWING THE UPPER LEVEL RIDGE TO
INFLUENCE THE PATTERN FOR THE NEXT SEVERAL DAYS. THIS WILL
BRING A WARMING TREND IN HIGH TEMPERATURES THROUGH
MONDAY/TUESDAY (80-90% CHANCE) UNTIL HIGHS REACH THE LOW TO MID
80S THROUGH MOST OF THE LOWER ELEVATION AREAS. WINDS WILL BE
GENERALLY DIURNALLY DRIVEN WITH A FEW AREAS (ESPECIALLY ALONG
THE CASCADE GAPS AND THE COLUMBIA BASIN) REACHING WIND GUSTS OF
15 TO 25 MPH AT TIMES (10-30% CHANCE).
THE UPPER LEVEL PATTERN BECOMES MORE ZONAL ON TUESDAY AS THE
RIDGE PUSHES OFF TO THE EAST AND A TROUGH/SHORTWAVE OFF BRITISH
COLUMBIA OVERTAKES THE PATTERN. CLUSTERS STRUGGLE AND DIVERGE
GREATLY HOW IT WANTS TO HANDLE THE UPPER LEVEL TROUGH AS WE
INCH CLOSE TO THE WEEKEND. HANDLING ON STRENGTH OF THE
SHORTWAVE, TIMING, OR IF IT EVER COMES ONSHORE IS ALL OVER THE
PLACE WITH NO ONE CLEAR SOLUTION. FOR EXAMPLE, BY FRIDAY
AFTERNOON, 19% OF MEMBERS BRINGS A STRONGER TROUGH THAT WILL
ENABLE A WIDESPREAD PRECIPITATION PATTERN OVER THE REGION. OF
THE 64% OF MEMBERS, GUIDANCE WANTS TO DELAY THE ONSHORE OF THE
TROUGH AND SECLUDE THE WETTER PATTERN OVER THE MOUNTAIN AREAS.
THE REMAINING 17% COMPLETELY TEARS THE SHORTWAVE WITH NO
PRECIP. WHILE IT DOES APPEAR THE VAST MAJORITY (81% OF MEMBERS)
OF CLUSTERS KEEPS THE PATTERN DRY ON FRIDAY, CONFIDENCE HOW THE
WEATHER PATTERN WILL PLAY OUT STILL REMAINS FAIRLY UNCERTAIN
GOING INTO NEXT WEEKEND. STILL PLENTY OF TIME TO MONITOR THIS
EVOLVING FORECAST, BUT NOT CURRENTLY FORETELLING ANY MAJOR
IMPACTS (30-50% CHANCE) ALTHOUGH THAT CAN CHANGE DEPENDING ON
NEW GUIDANCE.
AVIATION /12Z TAFS THROUGH 12Z SUNDAY/
VFR CONDITIONS PREVAIL THROUGH THE PERIOD WITH LIGHT AND
VARIABLE WINDS THROUGH THE PERIOD. MAY SEE SOME FEW TO SCT
CLOUDS PUSH THROUGH AT SOME SITES, BUT NO CIG OR VIS ISSUES
ANTICIPATED TO COME OUT OF THIS PERIOD.
PRELIMINARY POINT TEMPS/POPS
PDT 78 48 82 52 / 0 0 0 0
ALW 79 53 82 57 / 0 0 0 0
PSC 82 51 84 52 / 0 0 0 0
YKM 82 53 83 53 / 0 0 0 0
HRI 81 50 84 52 / 0 0 0 0
ELN 78 50 79 51 / 0 0 0 0
RDM 79 42 83 44 / 0 0 0 0
LGD 79 47 82 50 / 0 0 0 0
GCD 80 48 84 49 / 0 0 0 0
DLS 85 56 87 58 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...NONE.
OR...NONE.
DISCUSSION...95
AVIATION...95
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