451
FXUS66 KPDT 102311
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
411 PM PDT WED SEP 10 2025
UPDATED AVIATION DISCUSSION
AVIATION...00Z TAFS
SITES IN WASHINGTON ARE GENERALLY EXPECTED
TO BE VFR THROUGH THE PERIOD, HOWEVER OUR OREGON SITES, NAMELY BDN
AND RDM, ARE EXPECTED TO RECEIVE YET ANOTHER ROUND OF SHOWERS,
NAMELY DURING THE EVENING AND OVERNIGHT PERIOD HEADING INTO
THURSDAY, ALTHOUGH ANOTHER ROUND COULD FIRE OFF DURING THE DAY
THURSDAY AS WELL. THUNDERSTORMS ARE NOT ANTICIPATED FOR THE TWO
SITES AS OF NOW. LESSER CHANCES EXIST FOR PDT AND ALW AS WELL
DURING THE OVERNIGHT PERIOD INTO THURSDAY, HOWEVER WEATHER MODELS
ARE STARTING TO PUSH THE BULK OF RAINFALL TO THE SOUTH AND EAST
OF PDT/ALW OVER THE PERIOD. OTHERWISE, EXPECTED GUSTY WINDS AT DLS
WITH LIGHT WINDS ELSEWHERE, AND SCT-BKN MID-LEVEL CIGS ACROSS
WASHINGTON SITES, WHILE OREGON SITES ARE GENERALLY BKN-OVC 5-10
KFT. EVANS/74
PREV DISCUSSION
/ISSUED 148 PM PDT WED SEP 10 2025/
DISCUSSION...AREAS OF SHOWERS AND THUNDERSTORMS EXPECTED TO
DEVELOP LATER IN THE AFTERNOON. CURRENT COVERAGE SHOWS A COUPLE
OF ISOLATED SHOWERS MOVING ACROSS THE MOUNTAINOUS AREAS WITH SOME
POCKETS OF THUNDER EMBEDDED. MAIN THREATS TODAY WILL BE LOCALLY
HEAVY RAIN, GUSTY WINDS, AND SMALL HAIL FROM THE STRONGEST STORMS. FLASH
FLOOD WATCHES (MAINLY FOR SCAR BURNS) ARE IN EFFECT THROUGH THE
NEXT DAY. WPC ISSUED MRGL (AT LEAST 5%) FOR EXCESSIVE RAINFALL
THROUGH FRIDAY MORNING IN PARTS OF THE SOUTHERN BLUES. AREAS
ACROSS THAT REGION IS EXPECTED TO RECEIVE ANYWHERE FROM A HALF
INCH TO AN INCH AND HALF (65-85% CHANCE). THIS WILL CAUSE SOME
CONCERNS FOR DEBRIS FLOW FLOODS GOING THROUGH THE NEXT DAY. PARTS
OF THE SOUTH- CENTRAL WASHINGTON WILL BE ON THE MUCH DRIER SIDE,
RECEIVING UP TO A TENTH OF AN INCH (50-70% CHANCE) GOING THROUGH
THE NEXT DAY. TEMPS WILL STAY COOLER GOING THROUGH THE WEEK,
CONTINUING THE RELIEF FROM THE HEAT WE SAW LAST WEEK.
AS THE TROUGH MOVES ON FROM THE AREA, RAIN COVERAGE WILL DECREASE
HEADING CLOSER TO THE WEEKEND. FRIDAY WILL BE MUCH DRIER, WITH
SHOWERS AND THUNDERSTORMS CONCENTRATED TOWARDS THE EAST MOUNTAINS
AND WALLOWA'S (65-75% CHANCE). WE'LL GET A BREAK FROM THE
CONVECTION ON SATURDAY AS THE TROUGH MOVES OUT AND A SHORT-STAYED
RIDGE MOVES OVER THE PACNW. THIS BREAK WILL PROVE TO BE SHORT
LIVED AS ANOTHER LOW FOLLOWS SHORTLY BEHIND IT. ANOTHER WAVE WILL
PUSH INTO THE REGION SUNDAY, BUT DOES NOT APPEAR TO BE AS ROBUST
AS THE SYSTEM FROM WHAT WE'LL SEE TODAY AND TOMORROW. CLUSTERS ARE
AGREEMENT THAT WE'LL RE-ENTER ANOTHER WET PATTERN DURING THE
BEGINNING OF NEXT WEEK, BUT TO WHAT EXTENT REMAINS TO BE
UNDETERMINED SINCE CONFIDENCE IN GUIDANCE PLUMMETS AFTER SUNDAY.
REGARDLESS, TEMPERATURES WILL REMAIN NEAR TO JUST BELOW NORMAL FOR
THE NEXT SEVERAL DAYS AND WE'LL HAVE TO PAY ATTENTION HOW NEXT
WEEK UNFOLDS.
PRELIMINARY POINT TEMPS/POPS
PDT 58 79 56 80 / 60 60 20 20
ALW 62 81 60 81 / 60 50 30 30
PSC 59 85 57 84 / 30 30 10 10
YKM 58 87 56 85 / 10 20 10 10
HRI 60 83 58 83 / 40 40 10 10
ELN 56 85 54 83 / 10 10 10 10
RDM 48 73 46 78 / 60 50 20 0
LGD 52 75 52 78 / 70 70 40 50
GCD 52 72 50 77 / 80 70 40 30
DLS 61 79 59 80 / 20 20 10 0
PDT WATCHES/WARNINGS/ADVISORIES
OR...FLASH FLOOD WATCH THROUGH THURSDAY EVENING FOR ORZ503-505-506.
FLASH FLOOD WATCH UNTIL 11 PM PDT THIS EVENING FOR ORZ509-511.
WA...NONE.
SHORT TERM...95
LONG TERM....95
AVIATION...74
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