114
FXUS66 KPDT 061716
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1016 AM PDT SAT SEP 6 2025
UPDATED AVIATION DISCUSSION
AVIATION...18Z TAFS
A COMPLEX WEATHER SETUP FOR TODAY WILL MAKE
FOR VARIABLE CONDITIONS, VARYING FROM LINGERING AREA SMOKE/HAZE,
TO ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ON TOP OF WHAT HAS
ALREADY OCCURRED THIS MORNING. THIS MORNING'S ROUND OF SHOWERS IS
STARTING TO PETER OUT BUT MAY STILL INFLICT BRIEF MVFR CONDITIONS
FOR MAINLY PSC, PDT, RDM, AND BDN. THEN, ONCE SOME CLEARING TAKES
PLACE THIS AFTERNOON, WEATHER MODELS SUGGEST ANOTHER ROUND OF
SHOWERS AND THUNDERSTORMS DEVELOPING ACROSS CENTRAL OREGON AND
SPREADING NORTHWARD.
DUE TO THE SCATTERED NATURE OF THESE SHOWERS AND STORMS,
CONFIDENCE IS ONLY MODERATE (40-50%) ON ANY ONE SITE RECEIVING
ANYTHING, BUT BEST ODDS LOOK TO BE IN DLS AND YKM FOR AT LEAST
THIS EVENING FOR THUNDERSTORMS IN PARTICULAR, WITH SHOWERS
ELSEWHERE. WINDS WILL REMAIN LIGHT AND MOSTLY TERRIAN-DRIVEN,
HOWEVER OUTFLOW WINDS FROM STORMS MAY MAKE FOR BRIEF GUSTY
CONDITIONS. EVANS/74
PREV DISCUSSION
/ISSUED 802 AM PDT SAT SEP 6 2025/
MORNING UPDATE...MADE A MENTION OF THUNDER ACROSS THE COLUMBIA
BASIN WITH THE SHOWERS THIS MORNING, AS HAVE HAD A FEW OBS OF
LIGHTNING, ALBEIT ISOLATED. ANOTHER ROUND OF SHOWERS AND STORMS IS
EXPECTED TO FORM LATER THIS AFTERNOON.
PREV DISCUSSION... /ISSUED 203 PM PDT FRI SEP 5 2025/
DISCUSSION...AN UPPER LOW OFF THE COAST WILL GRADUALLY MOVE
EASTWARD THROUGH MONDAY, WITH THE BROADER UPPER TROUGH IMPACTING
THE AREA OVER THE WEEKEND.
SHOWERS AND THUNDERSTORMS WILL AFFECT THE PACIFIC NORTHWEST OVER
THE NEXT FEW DAYS...MAINLY OVER CENTRAL OREGON TODAY, THEN CENTRAL
OREGON AND THE CASCADES ON SATURDAY. A RED FLAG WARNING REMAINS IN
EFFECT THROUGH THIS EVENING. THUNDERSTORMS LOOK TO BECOME MORE
WET THROUGH THE WEEKEND AND SOME AREAS, ESPECIALLY THE MOUNTAINS
AND CENTRAL OREGON COULD END UP GETTING SOME DECENT RAINFALL
AMOUNTS.
THE BIGGEST QUESTION REMAINS ABOUT CLOUD-TO-GROUND LIGHTNING
STRIKES, AND HOW MANY IN A GIVEN AREA AND WHAT THAT IMPACT WILL
BE ON ANY NEW FIRE STARTS, ESPECIALLY ON SATURDAY. OTHER QUESTIONS
ARE WHAT IMPACT SMOKE WILL HAVE ON THUNDERSTORM DEVELOPMENT AND IF
RAIN WILL ALLEVIATE CONCERNS FROM LIGHTNING, AT LEAST IN SOME
AREAS. WILL NEED TO KEEP WATCH ON THIS TO SEE IF ANY FIRE WEATHER
HEADLINES BECOME NECESSARY.
BY WEDNESDAY, MORE GENERALLY LOW (<=30%) PRECIPITATION CHANCES
ARE EXPECTED AS AN UPPER TROUGH REMAINS OVER THE WESTERN CONUS.
HIGH TEMPERATURES WILL COOL EACH DAY THROUGH THE WEEKEND AND INTO
EARLY NEXT WEEK AND WILL RETURN TO SEASONAL NORMALS BY EARLY NEXT
WEEK. HIGH TEMPERATURES ARE EXPECTED TO REMAIN NEAR NORMAL
THROUGH THE WEEK. THE COOLER TEMPERATURES WILL ALSO HELP INCREASE
RH VALUES.
PRELIMINARY POINT TEMPS/POPS
PDT 88 60 84 58 / 40 40 40 20
ALW 90 66 85 62 / 30 40 40 20
PSC 90 61 87 58 / 30 20 30 10
YKM 91 63 86 57 / 30 40 40 10
HRI 90 63 86 60 / 40 30 40 10
ELN 89 59 81 54 / 40 30 50 20
RDM 86 50 79 49 / 50 50 40 20
LGD 87 56 84 52 / 40 40 50 20
GCD 89 54 82 53 / 50 40 30 10
DLS 89 64 82 60 / 40 50 40 10
PDT WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...RED FLAG WARNING FROM 4 PM THIS AFTERNOON TO 3 AM PDT SUNDAY FOR
WAZ690-695.
SHORT TERM...74
LONG TERM....77
AVIATION...74
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