Richland, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

104
FXUS66 KPDT 301708
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1008 AM PDT Fri May 30 2025

Updated Aviation Discussion

.SHORT TERM...Today through Sunday...Overnight satellite imagery
shows clear skies across the forecast area as ridging slowly builds
overhead today. Expect dry and warm conditions today, before active
weather returns Saturday afternoon with the arrival of a broad
trough based in the north Pacific. While this system looks to keep
most of its moisture to our north, pressure gradients will tighten
quite a bit as this system is pretty deep in nature, making for a
gusty day across the forecast area. Based on NAM pressure gradient
guidance, would not be surprised if much of the low-lying forecast
area sees gusts over 30 mph, with gusts 50 mph or more across the
Cascade Gaps, where the NAM depicts cross-Cascade pressure gradients
in the 9-11 mb range late Saturday afternoon and evening.

High Wind Watches are in effect for our Cascade Gaps zones as a
result, with Wind Advisories looking more and more likely across the
Basin as models better key in on these tight pressure gradients
associated with this oncoming system. Could see some light precip
over the WA Cascade crests (30-40% chance), but otherwise models
keep most of the moisture advection associated with this system to
our north and west. Quite the reversal from what models were
suggesting earlier in the week.

A cutoff low will split from this parent trough on Sunday, diving
down toward SoCal, causing the region to fall under a dry NW flow
pattern heading into the start of next work week. What looked to be
a wet week now looks to be mild and dry, as the trough progresses to
our east and a dry pattern takes hold starting on Sunday. Temps will
peak on Saturday due to ongoing ridging and warm air advection, with
highs in the upper 80s and low 90s across the lowlands, before
settling back down toward more seasonable readings (70s and low 80s)
by Sunday. Evans/74

.LONG TERM...Monday through Friday...A dry troughing pattern will
prevail through this long term period. Although there could be
slight chances (<20%) of light rain along the crest of the WA/OR
Cascades Wednesday night through Friday, the forecast area will
remain too dry for lowland rain. That being said, this dry period
may also increase temperatures by a few degrees mainly in the 70s
across majority of the forecast area (>90% confidence) with the
Columbia Basin reaching to low-mid 80s as well (60-90% chance). In
addition, RHs around the Columbia Basin, central OR and portions
of the John Day Highlands will be 15-20% through Tuesday night
before increasing Wednesday into Friday.

The cross-Cascade pressure difference and the northwesterly flow
aloft will induce breezy to locally windy conditions over the
Cascade gaps through the extended period during the afternoon and
evening hours. The probability of wind gusts >=30 mph is 60-90%.
Other than that, winds at the remaining locations are expected to
be around 20 mph or less. Feaster/97


AVIATION...18Z TAFs...VFR conditions to prevail through the
period. Periodic CIGs will be few-sct AOA 15kft to 25kft AGL
through tomorrow morning. Winds will be light, less than 12kts,
through the period. Lawhorn/82

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  86  53  89  50 /   0   0   0   0
ALW  85  56  89  52 /   0   0   0   0
PSC  87  55  94  50 /   0   0   0   0
YKM  86  57  91  49 /   0   0   0   0
HRI  88  57  92  51 /   0   0   0   0
ELN  85  52  84  47 /   0   0   0   0
RDM  90  52  84  40 /   0   0   0   0
LGD  84  55  90  48 /   0   0   0   0
GCD  89  55  93  48 /   0   0   0   0
DLS  89  61  83  51 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...High Wind Watch from Saturday afternoon through Saturday evening
     for ORZ041.

WA...High Wind Watch from Saturday afternoon through Saturday evening
     for WAZ024-026.

&&

$$

SHORT TERM...74
LONG TERM....97
AVIATION...82