735
FXUS66 KPDT 250527
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1027 PM PDT Thu Jul 24 2025

.UPDATED AVIATION...06Z TAFs...VFR conditions will persist through
the forecast period. Winds will remain breezy at DLS near 19 kts
and gusts near 25 kts. All other sites will remain below 10 kts
through the much of the night before winds increase beginning at
12-15Z for PSC and ALW, 15-17Z for YKM/PDT and 20-22Z for RDM/BDN
respectively. Winds will range (9-15)G(15-22)kts at PSC/ALW,
(14-17)G(21-25)kts at YKM/PDT and (7-12)G(15-19)kts RDM/BDN. CIGs
will remain mostly SKC with a few patchy FEW250 at YKM and PSC.
Bennese/90


&&

.PREV DISCUSSION... /issued 414 PM PDT Thu Jul 24 2025/

DISCUSSION...
Today through Saturday...Warm dry, breezy to locally windy
conditions will persist for the next couple of days. No expected
thunderstorms through Friday, but there is a general risk along
the edge of Grant and Wallowa counties Saturday based on SPC
Outlook. High temperatures will exceed into the mid/upper 90s
today. However, temps may cool by a few degrees tomorrow through
Saturday due to the approaching shortwave trough from the British
Columbia area. Daytime RHs will be in the upper teens and low 20s
through Friday over the eastern mountains and Columbia Basin.
There may be locally low RHs in the upper teens around Crook
county and portions of Grant county Saturday, but will slightly
improve for most locations. Breezy to locally windy conditions may
develop across The Gorge and Kittitas Valley through this period,
though with the remaining forecast area having light to breezy
winds. Feaster/97

Sunday through Thursday...Dry southwesterly flow will start the
extended period on Sunday.  Heights will rise into midweek as the
region is on the western periphery of a large ridge over the
midsection of the country.  As the heights rise, the flow will also
turn more southerly, which will also allow for more moisture to move
into the area by the middle or end of the week.  There are low
chances(10-20 percent) of mainly mountain thunderstorms across
central Oregon and the Ochoco-John Day Highlands on Monday and
Tuesday.  There is potentially a petter chance toward the middle and
latter part of the week, depending on how how much moisture moves in
to the area.

High temperatures will rise each day through midweek, then peak
around Tuesday/Wednesday before decreasing on Thursday.  High
temperatures will reach around the triple digits in the Columbia
Basin, Foothills of the Blue Mountains, Yakima and Kittas Valley.
These temperatures will be about 10 degrees above normal. The ECMWF
EFI does start to focus in on these temperatures, with values in the
0.6 to 0.7 range.  NBM probabilities of high temperatures >=100
degrees across the Basin and nearby locations on Tuesday and
Wednesday are 50-70 percent.



&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  61  90  57  87 /   0   0   0   0
ALW  65  90  62  87 /   0   0   0   0
PSC  61  93  57  90 /   0   0   0   0
YKM  60  90  57  87 /   0   0   0   0
HRI  63  92  59  89 /   0   0   0   0
ELN  60  83  55  82 /   0   0   0   0
RDM  49  87  47  84 /   0   0   0   0
LGD  56  88  54  85 /   0   0   0   0
GCD  55  89  54  88 /   0   0   0  10
DLS  63  84  60  83 /   0   0   0   0

&&

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

$$

SHORT TERM...97
LONG TERM....77
AVIATION...90