Pasco, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

332
FXUS66 KPDT 122353
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
453 PM PDT Sat Apr 12 2025

.UPDATED AVIATION...

.AVIATION...00Z TAFs...VFR conditions prevail for the period.
Winds gusty Winds continue to gust 20-30 knots at
DLS/PDT/YKM/ALW/PSC. Winds will lighten up heading into the later
evening hours to 10-15 knots until eventually to less than 10
knots before the period ends. Clear to few skies, visibilites
remaining P6SM, with no precip anticipated for the 00Z period.


&&

.PREV DISCUSSION... /issued 205 PM PDT Sat Apr 12 2025/

SHORT TERM...Today through Monday...Windy day today for the
forecast area as an upper-level trough sweeps through the PacNW. The
NW flow on the back end of this system has also provided for some
light precip across the central WA Cascades, however this will cease
this evening as drier air moves behind the trough. Winds are
expected to diminish tonight as well, becoming light by daybreak
Sunday.

Gusts have approached 40 kts across the Cascade Gaps and have
wavered in the 25-35 mph range elsewhere across the Basin, but thus
far all sites have stayed below advisory criteria, with Ellensburg
coming the closest. Ridging then starts to move in for Sunday and
Monday, making for quiet, calm, and clear weather. Temps will start
to rise through the period, especially on Monday as thermal
troughing begins to develop over Oregon. This looks to be especially
prominent across the southern portions of our forecast area. NBM
probabilistic guidance isn`t too promising as far as the likelihood
of highs reaching 80 for central Oregon Monday afternoon, but under
these types of patterns, models tend to underestimate daytime
warming. Expect low to mid 70s elsewhere across the lowlands on
Monday. Evans/74

LONG TERM...Tuesday through Saturday...An approaching trough will
result in the flattening of the ridge that impacted the region
through Monday. The trough axis is expected to move into the western
portion of the forecast area by late Tuesday night/early Wednesday
morning. Precipitation is not expected with this system, though
gusty afternoon winds will remain possible. The strongest winds are
favored across the Columbia River Gorge and across the Kittitas
Valley, where winds of 15 to 20 mph will be experienced, with gusts
of 25 to 30 mph (40-60% chance for 30 mph or greater).

The first trough axis will move through the area Wednesday morning,
with another trough dropping quickly into the forecast area from the
north by Wednesday afternoon. In addition to another round of gusty
afternoon wind, this system does have additional moisture associated
with it.  Current analysis supports a 20-30% chance of precipitation
over the Blue Mountains Wednesday night through Thursday morning,
with showers diminishing by late Thursday afternoon. Cluster
analysis is generally supportive of another trough coming from the
north, though have limited agreement on how far east the system will
drop. Two of the four clusters supports precipitation over eastern
Oregon with the trough developing into a low pressure system. The
other two have the tough further east, closer to the Northern
Plains. These differences have an impact on precipitation presence.

The late week system is favored to move south through early Friday,
taking associated moisture with it. Ridging will move over the area
on Friday with dry conditions then expected through Saturday.

Temperatures will start off the period with values 10 to 15 degrees
above normal. The approaching troughs will lower temperatures 10 to
15 degrees by Thursday, putting values a few degrees below normals.
The return of the ridge Friday and Saturday will permit temperatures
to warm. By Saturday, values will rebound to 5 to 10 degrees above
normal for much of the forecast area. Branham/76


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  32  61  35  71 /   0   0   0   0
ALW  34  60  38  71 /   0   0   0   0
PSC  33  65  35  73 /   0   0   0   0
YKM  32  62  37  70 /   0   0   0   0
HRI  32  65  35  73 /   0   0   0   0
ELN  32  60  35  67 /   0   0   0   0
RDM  26  63  30  77 /   0   0   0   0
LGD  29  59  32  68 /   0   0   0   0
GCD  28  61  35  73 /   0   0   0   0
DLS  35  66  39  73 /   0   0   0   0

&&

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

$$

SHORT TERM...74
LONG TERM....76
AVIATION...95