525
FXUS66 KPDT 301724
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1024 AM PDT Sat May 30 2026

.KEY MESSAGES...
- Drier conditions return into the middle of next week, with
  winds becoming light by early next week

- Near to below normal temperatures this weekend warming to
  above normal into the middle of next week

&&

.DISCUSSION...
Today through Tuesday: Satellite imagery tonight
shows cloudy conditions across central OR and eastern half of
the forecast area, while light showers continue to move across
Wallowa and Union counties. Breezy winds remain through the
Cascade gaps and across portions of the Columbia Basin tonight.

Shower activity will diminish into the morning hours today as an
upper trough continues to swing northeast across the Northern
Rockies. While conditions dry out across the forecast area,
breezy winds (15-25mph with gusts up to 40mph) will continue
through the Cascade gaps, with locally breezy winds across the
Columbia Basin and Blue mountain foothills.

By Sunday, weak ridging will develop just offshore while the
trough transitions into a broad low over western MT and northern
ID. By Tuesday afternoon, the upper low will kick east with
upper ridge sliding over the PacNW. Winds will become weak and
diurnally driven through Tuesday, while a weak warming trend
will see afternoon temperatures in the 80s return Monday and
Tuesday.

Wednesday through Friday: Ensemble guidance is in good agreement
of an upper shortwave trough sliding across the PacNW Wednesday,
though there is some uncertainty in timing and strength of this
feature. While the main consensus is for a return of mountain
showers and breezy lowland winds, some solutions (28% of
members) favor a stronger shortwave that will bring area wide
showers that will persist through Thursday morning. Otherwise,
this pattern would also favor a return of afternoon/evening
isolated thunderstorms over the mountain areas Wednesday.

Dry conditions will return to the area after the shortwave exit
Thursday, but ensemble guidance is in agreement that showers
will return to the Cascades and breezy Cascade gap winds will
develop sometime Friday as an upper low sets up offshore the
PacNW (confidence 40-60%). Lawhorn/82

&&

.AVIATION /18Z TAFS THROUGH 18Z SUNDAY/...
VFR conditions will persist through the forecast period for all
sites except BDN. BDN will see a few hours of MVFR due to low
clouds lingering over the site, these should dissipate after
22Z. DLS/PDT/RDM/BDN/YKM will all see breezy winds through the
period of 10-15 kts with gusts between 20-30 kts. Winds at these
locations will settles after 06-07Z. All other sites will be
below 10 kts. 90

&&

.Preliminary Point Temps/PoPs...
PDT  67  42  71  44 /   0   0   0   0
ALW  69  47  72  49 /  10   0   0   0
PSC  74  43  77  47 /   0   0   0   0
YKM  73  42  77  47 /   0   0   0   0
HRI  71  43  74  46 /   0   0   0   0
ELN  64  39  71  44 /   0   0   0   0
RDM  62  29  66  34 /   0   0   0   0
LGD  65  37  68  39 /   0   0   0   0
GCD  65  34  69  37 /   0   0   0   0
DLS  69  45  76  49 /   0   0   0   0

&&

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

&&

$$

DISCUSSION...82
AVIATION...90