Bend, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

606
FXUS66 KPDT 060535
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1035 PM PDT Thu Jun 5 2025

Updated Aviation Discussion...

.AVIATION...06Z TAFs...VFR conditions to prevail through the
period. SCT CIGs AOA 25kft AGL will increase across all sites
overnight, then becoming few or skc tomorrow afternoon. Winds will
be light, 12kts or less, at most sites through the period...except
site DLS where winds will become 12-20kts with gusts around 25kts
developing around 18Z. A periodic gust to around 20kts will also
be possible at sites RDM/BDN after 20Z. Lawhorn/82


PREV DISCUSSION... /issued 127 PM PDT Thu Jun 5 2025/

.SHORT TERM...Today through Saturday...Another quiet day is upon
us as dry northerly flow prevails over the PacNW, leading to
mostly clear skies and seasonable temperatures. A building high
pressure system over the north Pacific will lead to an amplified
NW flow pattern that in turn will make for gusty conditions
through the Cascade Gaps during the day Friday. Guidance suggests
gusts through the Columbia River Gorge and Kittitas Valley could
eclipse 30 mph. As this high pressure system moves onshore,
attention will shift toward that of our first heat wave of the
summer.

Not much else to speak of weather-wise until the heat really starts
to build in on Sunday. Temps will be noticeably warmer on Saturday
with highs in the lowlands reaching well into the 90s, but we will
see some overnight relief, as we`re early enough in the warm season
that low temps are expected to bottom out into the 50s and low 60s,
lessening the severity of this upcoming heat spell. Evans/74

.LONG TERM...Sunday through Thursday...Sunday and Monday continue
to be the warmest days of the period according to guidance as
strong high pressure persists over the region. NBM has nudged
temps upward a degree or two on Monday, with widespread highs
above 100 across the lower Basin, potentially spreading into the
Yakima and Walla Walla Valleys as well. NBM probabilistic
currently suggests about a 50-70% chance for highs to exceed 100
degrees on Monday for the lower Basin, and 40-50% for the other
areas mentioned. Elsewhere across the lowlands, highs look to
easily reach the mid to upper 90s. A bit too early for headlines
on this brief heat wave for now, but it`s looking increasingly
likely that Heat Advisories will be needed Sunday and Monday,
especially given the fact that it`s only early June.

Both the deterministic GFS and ECMWF depict ridge breakdown
occurring during the latter half of Monday, with a pair of weak
shortwaves circulating through the region Tuesday into Wednesday.
This pattern is prime for dry thunderstorms across our eastern
mountains, so did make sure to include mention of it in the forecast
for at least Monday and Tuesday afternoon (PoPs 15-20%), which the
NBM does seem to pick up on in some isolated spots this far out,
further increasing confidence. Fuels at the higher elevations are
not quite at critical levels, but isolated storms spilling out into
the nearby foothills could potentially lead to critical conditions,
depending on whether or not such zones are declared ready for
wildfire season. Will be something to keep an eye on in the coming
days.

Afterwards, Wednesday onward, ensemble clustering broadly suggests a
cool, troughing pattern, reversing the heat expected this weekend.
The overall synoptic pattern is progressive enough to hinder
confidence (only around 40% at this time), but models do suggest
cooler temperatures by the end of next week, with lowland highs
closer to low 80s and even 70s. Evans/74

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  55  90  58  91 /   0   0   0   0
ALW  59  88  62  89 /   0   0   0   0
PSC  56  93  59  94 /   0   0   0   0
YKM  59  92  59  93 /   0   0   0   0
HRI  55  93  59  95 /   0   0   0   0
ELN  58  87  58  92 /   0   0   0   0
RDM  45  86  49  92 /   0   0   0   0
LGD  50  83  54  87 /   0   0   0   0
GCD  48  85  53  91 /   0   0   0   0
DLS  61  90  60  93 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
&&

$$

SHORT TERM...74
LONG TERM....74
AVIATION...82