Redmond, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

807
FXUS66 KPDT 171021
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
321 AM PDT Thu Apr 17 2025

.SHORT TERM...Today through Saturday...Nighttime satellite imagery
shows mostly clear skies across the PacNW tonight, except for
stratus decks developing over the Wallowas and Elkhorns in
northeast OR. Breezy conditions have also come down tonight across
the area, with light winds across most of the forecast area at
this hour.

Today, developing in the wake of upper low that is currently
centered just east of Baker County, northerly flow aloft will
allow a cool and dry airmass to filter into the intermountain
PacNW. This flow regime will continue into early Friday keeping
conditions cool this and tomorrow morning with lows in the 30s,
while temperatures this afternoon will struggle to warm into the
lower to mid 60s across much of the lower elevations. Friday, a
transient ridge will swing through the PacNW, and allow for some
warming into the mid 60s to lower 70s in the afternoon. The dry
conditions with mostly clear skies will continue through Friday
under the upper ridge passage.

Overnight Friday, an approaching shortwave trough and attendant
cold front will push the upper ridge east of the region, with the
coupled system arriving to the forecast area early Saturday
morning. Ahead of the trough/front approach, pressure gradients
along the Cascade crest will tighten, resulting in strengthening
winds through the Cascade gaps Friday night into Saturday
morning. With the cold front passage at the surface, winds will
further increase through the Cascade gaps and into the Columbia
Basin, Blue Mountain foothills, and north central OR with the
strongest wind gusts of 35-45mph through the Kittitas valley and
the eastern Columbia River Gorge (confidence 70-80%). Otherwise,
the trough/frontal passage will result in light rain/snow showers
along the Cascade crest and northern Blues, with QPF accumulations
generally less than 0.05 inches in these areas (confidence
60-80%). Light showers will continue across the WA Cascade crest
through Saturday night as the region sits on the far southern end
of a broad upper trough developing across western Canada.
Lawhorn/82

.LONG TERM...Sunday through Thursday...

1. Mountain precipitation

2. Warmer and dry temperatures return midweek

3. Breezy westerly winds through the mountain gaps Sunday

The long term will be characterized by an upper level trough to end
the weekend followed by an upper level ridging pattern beginning
midweek. The upper level trough will bring cooler temperatures,
mountain precipitation as well as bring snow levels down to where
there will be light mountain snow.

Models begin the long term in relatively good agreement with an
upper level trough swinging into the region on Sunday. This will
bring northwest flow across the region as well as some cold air
advection. Not only will this system bring about cooler
temperatures, but also some light mountain precipitation. NBM
shows snow levels to drop to near 2600 feet Sunday night into
Monday morning. This will allow precipitation to fall as snow with
a 30-50% probability of 1 to 2 inches falling over Snoqualmie
Pass. However, due to daytime temperatures reaching at or above 40
degrees, and overnight lows at or near freezing, snow
accumulation will not linger on the roadways for very long. Models
show the precipitation to tapper off Monday morning bringing dry
conditions back over the area although still cooler in
temperatures as the trough continues to bring in cooler air. The
comparison to climatological records of the area, temperatures
will be at or below seasonal normal with areas seeing up to 10
degrees cooler than the standard. EFI does show temperatures to be
at or slightly below normal for this time of year. 80-100% of the
raw ensembles show temperatures will average between the upper to
mid 60s Sunday through the Basin and adjacent valleys, the lower
Columbia Basin and the foothills of the Blues while central/north
central OR and the John Day Basin will see upper 50s to low 60s.
Monday, temperatures will be slightly cooler with only the Basin,
Yakima Valley and a very isolated region along the lower Columbia
Basin will see temperatures above 60 while the remaining locations
will see mid to upper 50s with upper 40s to low 50s elsewhere.

By Wednesday models become a bit more skewed on the timing of the
next incoming upper level pattern. Clusters show mainly a timing
difference with the pattern. However, no precipitation is being
shown between Monday afternoon and the remainder of the period.
Models as well as ensembles show a steady increase in temperatures
through Thursday with temperatures along the lower and mid
elevations reaching back into the 70s. With the variances in the
clusters and the models, confidence in the temperatures this far
out is moderate at best (40-60%).

Lastly, strong westerly flow at the surface and a surface pressure
gradient tightening will enhance the winds through the Cascade Gaps
Sunday as the upper level system pushes in from the northwest into
the area. Much of the wind will be focused along the eastern slopes
of the Cascades as well as Goldendale, along the Simcoe Highlands as
well as the Gorge and the foothills of the southern Blues. Eastern
slopes and Simcoe Highlands through Goldendale will see a 40-60% of
wind gusts to 40 mph. The Gorge and along the foothills of the
southern Blues have 30-60% probabilities of 35-40 mph
gusts. Elsewhere will be calm with gusts below 15 mph. Bennese/90


&&

.AVIATION...12Z TAFs...VFR conditions will persist through the
forecast period. CIGs through the period will be mostly FEW250 or
SKC. The main highlight will be with the winds through RDM/BDN with
winds of 10G20KT beginning 18-20Z with 20-40% probabilities.
Elsewhere winds will remain below 8 kts.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  60  35  68  40 /   0   0   0   0
ALW  62  39  68  43 /   0   0   0   0
PSC  66  37  72  43 /   0   0   0   0
YKM  66  38  72  45 /   0   0   0   0
HRI  65  36  71  42 /   0   0   0   0
ELN  64  36  69  43 /   0   0   0   0
RDM  60  30  68  36 /   0   0   0   0
LGD  57  32  63  34 /   0   0   0   0
GCD  57  31  63  35 /   0   0   0   0
DLS  68  42  74  47 /   0   0   0   0

&&

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

$$

SHORT TERM...82
LONG TERM....90
AVIATION...90