FXUS66 KPDT 261725

AFDPDT



Area Forecast Discussion

National Weather Service Pendleton OR

1025 AM PDT Thu Jun 26 2025



.UPDATED AVIATION.



.AVIATION...18Z TAFs...VFR conditions persist as clear to mostly

clear conditions prevail over the region. Winds are a bit on the

breezy side today, as DLS, PDT, ALW initialize with gusts around 

20 mph. Winds will stay between 10-15 mph throughout the period 

for these sites. BDN/RDM will see higher gusts around 20-25 mph 

starting at 19Z for RDM and 22Z for BDN. No VIS and CIG issues 

expected as winds drive to mix and keep conditions fairly visible.





PREV DISCUSSION... /issued 156 PM PDT Wed Jun 25 2025/ 



SHORT TERM...Today through Friday...Current satellite and 

radar imagery show clear skies across the forecast area with few 

clouds forming over portions of Kittitas and Yakima Valley including 

John Day Highlands. Thanks to the southwest flow, isolated 

thunderstorms will develop over the eastern mountains this afternoon 

through evening. Abundant lightning may be main threat with a 30-50% 

probability, suggested from HREF 4-hr prob of thunder. CAMs show 

CAPE values to be about 500-800 J/Kg with the raw ensembles favoring 

a 30-50% prob for very light showers. That said, it is doubtful for 

these storms to be severe due to weak instability and lack of 

moisture support. Showers may linger over the Wallowas tonight 

before gradually decreasing Thursday. Dry conditions will return

Friday.



Breezy to locally windy conditions will continue for this period 

across the Cascade Gaps, influenced from the strong pressure 

gradients. The raw ensembles suggest a >50% prob for gusts exceeding 

to 30 mph over the Columbia River Gorge and Kittitas Valley today 

and tomorrow in the afternoons, but mainly the Gorge for Friday 

afternoon also. There is a 30-40% chance of gusts at 35 mph as well. 

Otherwise, winds will remain breezy for the remaining forecast area. 



Temperatures will remain mainly in the 70s and 80s across majority 

of the forecast area through this term. However, the Columbia Basin 

will be in the high 80s and low 90s before slightly cooling by few 

degrees tomorrow into Friday. RH values continue in recovery through 

Friday as this weak system passes. Feaster/97



LONG TERM...Saturday through Wednesday...Warm, dry conditions 

prevail through the weekend before the system arrives Monday and 

Tuesday. Showers will develop across the Southern Blues and eastern 

mountains with a slight chance (<30%) of thunderstorms over the high 

terrains of central OR Monday evening. Severity is less likely due 

to weak instability and low moisture level, though CG lightning 

could be threatening. 



Temperatures remain trending upward into next week with RHs 

gradually decreasing to the teens and 20s. Sunday onwards, temps 

will reach into the 90s or higher with Monday and Tuesday being our 

warmest and driest days of this period with temperatures reaching 

to the low 100s across the Columbia Basin (>60% confidence). That 

said, this could potentially raise concerns for critical fire 

conditions. Heat Risk will remain moderate across most of the 

forecast area Sunday and beyond, but with portions of the Columbia

Basin remaining in pockets of Major Heat Risk Monday and Tuesday.



Winds will be light with occasional breezes for this long term 

period. Feaster/97 



&&



.PRELIMINARY POINT TEMPS/POPS...

PDT  83  56  83  55 /   0  10   0   0 

ALW  83  59  81  58 /   0  10   0   0 

PSC  86  57  85  55 /   0  10   0   0 

YKM  82  54  81  54 /  10  10   0   0 

HRI  85  57  85  56 /   0  10   0   0 

ELN  78  54  76  54 /  10  10   0   0 

RDM  80  44  80  44 /   0   0   0   0 

LGD  80  52  78  50 /  10  10   0   0 

GCD  83  50  81  49 /   0  10   0   0 

DLS  78  58  79  57 /   0  10   0   0 



&&



.PDT WATCHES/WARNINGS/ADVISORIES...

OR...None.

WA...None.

&&



$$



SHORT TERM...97

LONG TERM....97

AVIATION...95

