FXUS66 KPDT 262335

AFDPDT



Area Forecast Discussion

National Weather Service Pendleton OR

435 PM PDT Thu Jun 26 2025



.Updated for Aviation...





SHORT TERM...today through Sunday morning...Satellite shows 

stratus entering from the WA Cascade and into the region. With a 

shortwave passing through the PacNW, chances of PoP across the WA 

Cascades increase through the afternoon and early evening hours. 

Precip may extend close to the Yakima/Ellensburg area during the 

late afternoon/early evening (>80% chance). Nothing to suggest any

thunder will be associated with these storms. Weather will clear 

by the early morning hours of Friday with a ridge starting to push

through the area. Temperatures will slow rise through the short 

term as the pattern begins to favor a warming trend from the short

term that will last through the long term. Winds will be breezy 

across the Basin with general diurnal winds through the next few 

days. Strongest winds will be today through Friday, with most 

places capping their gusts at 20-30 knots.



LONG TERM...Sunday morning through Thursday...The long term is

more animated than the short term, with a ridge setting up for a

potential heat wave during the holiday week coupled with 

potential of thunderstorms in Central OR.



Ridging will start moving through the region over the weekend,

setting up a pattern for temperatures to begin a warming trend

over the weekend. High temperatures will tapper off in the mid 90s

for much of the Basin plus Central OR/Kittitas Valleys. Monday

appears to be the hottest day with NBM delivering triple digits

for the Columbia Basin and creeping into the Kittitas. NBM

currently advertises 40-60% chances of temperatures exceeding 100

degrees in the Tri-Cities area, among other portions of the WA

Columbia Basin. Heat advisories might need to be considered for 

the Columbia Basin/Gorge as preliminary Heat Risk values are >3

for the Mon-Tues timeframe. Any advisories needed or added will be

assessed and decided through the next few days if they are still

warranted. 



A break in the ridge with a shortwave will push down through the

region Monday, allowing for some moisture advection (coupled with

the daytime heating) to bring chances of thunderstorms across 

Central OR and across large parts of the Blues. The highest chance

for thunderstorm development will be the early afternoon through 

evening hours of Monday. Chances decrease vastly as we head into

Tuesday, with remnant showers lingering across the southern part 

of the region. Things become a bit less confident heading into 

Wednesday, as things naturally become less clear this far out. 

Members are completely split Tuesday going into Wednesday onwards 

how strong it will make the trough behind the ridge. Looking at 

meteograms confirms that temperatures wildly fluctuate around 

this same time frame. 



AVIATION...

00Z TAFS...VFR conditions are expected through the TAF period.



Wind gusts around 20 to 25 kts are occurring at all sites, at

least periodically and 25 to 30 kts at DLS. These gusts will

decrease this evening or overnight to 10 kts or less.



Wind gusts will increase Friday afternoon generally in the 20 to

25 kt range.



.PRELIMINARY POINT TEMPS/POPS...

PDT  56  83  56  85 /  10   0   0   0 

ALW  60  82  59  84 /  10   0   0   0 

PSC  58  86  57  87 /  10   0   0   0 

YKM  54  81  54  86 /  10   0   0   0 

HRI  58  86  56  87 /  10   0   0   0 

ELN  54  78  54  81 /  20   0   0   0 

RDM  45  80  44  84 /   0   0   0   0 

LGD  51  78  50  80 /  10   0   0   0 

GCD  50  82  49  83 /  10   0   0   0 

DLS  58  80  57  86 /  10   0   0   0 



&&



.PDT WATCHES/WARNINGS/ADVISORIES...

OR...None.

WA...None.

&&



$$



SHORT TERM...95

LONG TERM....95

AVIATION...77

