Richland, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

116
FXUS66 KPDT 122341
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
441 PM PDT Tue Aug 12 2025

.Updated Aviation Discussion.


.AVIATION...00Z TAFS...VFR conditions currently across all sites,
which will stay the course through the period. Gusty winds of 20-25
kts across KDLS/KRDM/KBDN this afternoon, slowly dissipating by late
evening. Elsewhere, winds will stay below 10 kts this evening.
Breezy conditions return by late Wednesday morning for all sites as
gusts of 20-30 kts will be possible, with highest values at
KDLS/KPDT.


&&

.PREV DISCUSSION... /issued 258 PM PDT Tue Aug 12 2025/

DISCUSSION...All is calm in the region currently. Satellite shows
some cumulus forming near the John Day Basin through the Eastern
Mountains. Slight chance (10-20% chance) that a stray dry thunder
storm could develop going through the later afternoon/early evening
hours. Some CAM guidance has trended downward for T-Storm potential,
but some confidence is left to put them in the grids for the
southern parts of Wallowa and Union County. This will be our only
precip/convection chances until late Thursday/early Friday morning
as the ridge continues to push westward out of the region and a
shortwave moves into the PacNW region. This will allow for
temperatures to cool going forward the next couple of days,
relieving us of the triple digit temperatures of today and
yesterday. High temps will be about 10-15 degrees cooler by the time
we start the weekend. Pressure gradients will get tighter as the
shortwave drops further south/southeast, enabling potential Wind
Advisory criteria gusts around the Kittitas Valley for Wednesday
afternoon.

Continued dryness with wind and low RH into Thursday will allow for
many Fire Weather Zones across Central OR/John Day Basin to continue
through tomorrow afternoon. Additionally, conditions across the WA
Basin through Kittitas Valley, along parts of Wallowa County will be
upgraded to Red Flag Warnings. Fire weather conditions will be less
elevated as we head into the weekend as the shortwave will bring
widespread precip into the region Friday and going through the rest
of the weekend. Chances for some wetting rain across the Cascade
Crests and portions of the Blue Mountains is possible (40-60%
chance). Highest QPF`s in the Blues will be up to 0.25", while
portions of the Basin will see 0.05 to 0.15 inches.

Heading into the weekend, the trough will bring a sharp SW flow a
loft into the region, allowing for more moisture advection, along
with increased thunderstorm chances across large portions of the
region Saturday. Some of the stronger storms will develop between
2PM-7PM with daytime heating adding instability, with an accompanied
cold front providing lifting Saturday. Thunderstorm coverage shifts
to Central OR, Southern Blues, and Eastern Mountains going into
Sunday as the cold front pushes to the east.
Upper level troughing will push back north-westward at the beginning
of the week, decreasing chances for showers and thunderstorms as the
pattern shifts to a more zonal and more westward trajection.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  94  59  83 /   0   0   0   0
ALW  73  95  63  84 /   0   0   0   0
PSC  68  98  59  87 /   0   0   0   0
YKM  67  93  58  86 /   0   0   0   0
HRI  71  96  61  86 /   0   0   0   0
ELN  66  87  57  79 /   0   0   0   0
RDM  55  92  50  83 /   0   0   0   0
LGD  62  92  56  84 /   0   0   0   0
GCD  60  93  55  86 /   0   0   0   0
DLS  71  89  63  81 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Extreme Heat Warning until 10 PM PDT this evening for ORZ041-044-
     505-507-508-510-511.

     Red Flag Warning from noon to 9 PM PDT Wednesday for ORZ691-693-
     701-702.

     Red Flag Warning until 11 PM PDT Wednesday for ORZ696-698-700-
     703>705.

WA...Extreme Heat Warning until 10 PM PDT this evening for WAZ024-
     026>029-521.

     Red Flag Warning from noon to 9 PM PDT Wednesday for WAZ690>694.

     Wind Advisory from 2 PM to 8 PM PDT Wednesday for WAZ026.

&&

$$

DISCUSSION....95
AVIATION...75