804
FXUS66 KPDT 071025
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
325 AM PDT Sun Jun 7 2026

.KEY MESSAGES...

- Widespread rain shower chances and isolated thunderstorms
  across the forecast area Monday into Tuesday

- Breezy lower elevations winds develop Tuesday through
  Wednesday


&&

.DISCUSSION...

Dry conditions areawide are anticipated Today as a shortwave
mid level, between systems ridging pattern influences the
sensible weather. Initially, dry low level air as seen in the
10-7 micrometer water vapor channel is contributing to tanking
temperatures this morning, where several observations are
reporting mid 30s F observations between RDM and BDN, where a
freeze warning is in place for this morning. As another upper
system prepared to track across the area by Tonight and Monday,
clouds will overspread central Oregon early Today and the
remainder of the forecast area by late afternoon as highs climb
into the upper 60s and low 70s in the lower elevation zones.
High confidence exists in overspreading rains (70-90%) for the
Cascade mountain zones Monday, and for all of the mountain zones
by Monday night while the lower elevations are more moderate
confidence of 50 to 70% confidence. The upper forcing will
weaken Tuesday relegating rain chances to the Mountain zones
only Tuesday into Tuesday night. Isolated thunderstorms are also
possible with instability enhanced diurnally. As this strong
compact shortwave is forecast to swing southeast across the
area, promoting possibly advisory level gap winds, namely the
Columbia River Gorge and Kittitas Valley where NBM members
projects 50 to 80% chances for sustained winds of 30 mph Tuesday
Afternoon. Russell/71

&&

.AVIATION /12Z TAFS THROUGH 12Z MONDAY/...

Ceilings are not expected to impact the lower elevation
terminals during this period, in fact Today will bring
relatively light winds at RDM and BDN, with more breezy
westerly winds YKM/DLS/ALW/PDT/PSC. Russell/71

&&

.FIRE WEATHER...

Breezy gap winds today will not coincide with critically low RH
This Afternoon in the only red flag ready zone (WA691). Combined
probabilities for RH 20% or less and winds 20 mph or less are
not even getting into the lowest 10% of probability. Overall
fire weather risk is low for the remaining 6 days of the
forecast as well, where Tuesday will bring the strongest winds
but Rh values up in the 40s during the afternoon. Lighting is an
isolated low confidence risk on Monday afternoon across the
eastern Mountain (10-15%) but upticks to around 25% chances by
Tuesday Afternoon. Russell/71

&&

.Preliminary Point Temps/PoPs...
PDT  70  45  69  47 /   0   0  30  80
ALW  70  49  71  51 /   0   0  20  80
PSC  74  47  73  47 /   0   0  30  60
YKM  73  47  70  46 /   0   0  40  50
HRI  73  46  71  46 /   0   0  30  70
ELN  66  41  65  43 /   0   0  40  60
RDM  68  41  63  41 /   0  10  60  80
LGD  66  42  69  46 /   0   0  30  90
GCD  67  41  67  43 /   0   0  50 100
DLS  71  51  67  51 /   0  10  60  80

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
WA...None.
OR...Freeze Warning until 8 AM PDT this morning for ORZ050-511.

&&

$$

DISCUSSION...71
AVIATION...71
FIRE WEATHER...71