536
FXUS66 KPDT 092319
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
419 PM PDT TUE SEP 9 2025
UPDATED AVIATION DISCUSSION
AVIATION...00Z TAFS
SCATTERED SHOWERS AND THUNDERSTORMS HAVE
ONCE AGAIN DEVELOPED ACROSS THE FORECAST AREA THIS EVENING. BDN
AND RDM ALREADY SEEING LIGHT SHOWERS IN THE AREA EARLY THIS
EVENING, WITH POCKETS OF THUNDERSTORMS DEVELOPING TO THE SOUTH OF
PDT AND ALW AS WELL. CURRENT FORECAST CALLS FOR THE SHOWER AND
STORM THREAT TO MOVE NORTH AS THE NIGHT PROGRESSES, BEFORE DRY
CONDITIONS PREVAIL BY THE EARLY MORNING HOURS OF WEDNESDAY.
ANOTHER ROUND OF SHOWERS AND ISOLATED STORMS IS EXPECTED TO
DEVELOP BY LATE WEDNESDAY AFTERNOON, HOWEVER, MAINLY FOR CENTRAL
AND EASTERN OREGON. DUE TO THE SCATTERED NATURE OF THE SHOWERS AND
STORMS, TSRA WAS LIMITED TO A TEMPO OR PROB30 MENTION. OTHERWISE,
EXPECT TERRAIN-DRIVEN WINDS LESS THAN 12 KTS (EXCEPT FOR IN THE
VICINITY OF STORMS) AND SCT-BKN CIGS AROUND 10 KFT. EVANS/74
PREV DISCUSSION
/ISSUED 201 PM PDT TUE SEP 9 2025/
DISCUSSION...RADAR SHOWS SHOWERS AND THUNDERSTORMS DEVELOPING
ACROSS THE REGION. UPPER LOW IS CREATING ENOUGH INSTABILITY WITH
ABUNDANT MOISTURE TO KEEP STORMS PULSING THROUGH THE REST OF THE
AFTERNOON. WILL SEE THE GREATEST CHANCE (25-35%) OF THUNDERSTORMS
NEAR THE BEND/CENTRAL OR REGION. HEAVY RAINFALL, CLOUD-TO-GROUND
LIGHTNING, AND LOCALLY GUSTY WINDS FROM STRONG STORMS WILL BE THE
PRIMARY THREAT GOING THROUGH TODAY AND THE NEXT COUPLE OF DAYS.
THE PATTERN WILL CONTINUE THROUGH THURSDAY AS THE LOW CONTINUES
TO PUSH THROUGH THE PACNW. SHOWERS AND THUNDERSTORMS EMBEDDED WITH
ABUNDANT LIGHTNING WILL CONTINUE TO BE THE MAIN STORY AS THE
WEATHER DISTURBANCE PROGRESSES AND BRINGS COOLER TEMPERATURES
ALONG THE PROCESS. HIGH TEMPS WILL TAPER DOWN TO SEASONAL NORMAL
TO AROUND 5 DEGREES BELOW NORMAL, WITH SOME PLACES IN THE AREA
ONLY REACHING THE HIGH 70S TO LOW 80S FOR THEIR HIGHS. TRAINING
STORMS ALONG WITH SLOW MOTION STORMS ACROSS THE REGION WILL CAUSE
FLOODING CONCERNS THROUGH MID WEEK. SCAR BURNED AREAS ARE MOSTLY
OF CONCERN, BUT OTHER AREAS WITH STEEP TERRAIN AND GENERAL FLOOD
PRONE AREAS WILL NEED TO MONITOR FOR POTENTIAL HAZARDS.
WE'LL GO THROUGH A MORE TRANSITIONAL WEATHER PHASE GOING INTO THE
WEEKEND, AS THE AREA WILL BE IN-BETWEEN TWO WEATHER SYSTEMS WHEN
THE CURRENT TROUGH EXITS THE REGION. SATURDAY WILL SEE US IN A
BIT OF A DRY BREAK THANKS TO THE TRANSITION WITH A TEMPORARY RIDGE
LIKE PATTERN. THIS WILL BE SHORT LIVED BEFORE THE NEXT WEATHER
SYSTEM ENTERS THE AREA AT THE BEGINNING OF NEXT WEEK WHEN THE NEXT
TROUGH QUICKLY MAKES ITS WAY IN. GUIDANCE HAS GOOD CONFIDENCE
(60-80% CHANCE) THAT WE WILL RE-ENTER ANOTHER WET PATTERN, BUT
CONFIDENCE IN CLUSTERS AND NBM FALLS RIGHT AFTER SUNDAY AND HOW
IT WANTS TO HANDLE THE STRENGTH OF THE SYSTEM THROUGHOUT NEXT
WEEK. REGARDLESS, EXPECT ANOTHER ROUND OF WIDESPREAD PRECIP
STARTING THE NEW WORK WEEK.
PRELIMINARY POINT TEMPS/POPS
PDT 57 81 58 77 / 40 30 70 70
ALW 61 82 62 77 / 40 20 60 70
PSC 57 85 59 79 / 30 20 40 50
YKM 58 86 58 84 / 30 30 20 20
HRI 57 84 60 79 / 40 20 50 60
ELN 53 84 56 81 / 20 30 10 20
RDM 47 74 49 72 / 50 70 60 50
LGD 52 79 53 74 / 30 40 80 80
GCD 49 75 52 69 / 40 70 80 80
DLS 60 81 62 76 / 30 40 30 30
PDT WATCHES/WARNINGS/ADVISORIES
OR...FLASH FLOOD WATCH FROM WEDNESDAY MORNING THROUGH THURSDAY
EVENING FOR ORZ503-505-506.
FLASH FLOOD WATCH THROUGH WEDNESDAY EVENING FOR ORZ509-511.
WA...NONE.
SHORT TERM...95
LONG TERM....95
AVIATION...74
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