Bend, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

545
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