707
FXUS66 KPDT 251735
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1035 AM PDT Sat Jul 25 2026

.KEY MESSAGES...
- Dry and Windy conditions today, have brought critical fire
  weather conditions.

- Quiet weather with diurnal breezes for much of the upcoming
  week, with Sunday and Tuesday being the breeziest days.

&&

.DISCUSSION...
An area of low pressure off the coast will continue to weaken as
it moves into northwest Washington later today. The region sits
in strong southwesterly flow between high pressure over the
Rockies and low pressure in the Gulf of Alaska. The dry
southwest flow is expected to remain over the region for much of
the upcoming week.

With the weak system moving by today, there will be a tight
pressure gradient and winds are expected to be quite gusty, in
the 25 to 35 mph range, and some locations as high as 40 mph,
especially the Cascade Gaps, Columbia Basin and Gorge, Simcoe
Highlands and Kittitas Valley. These winds, coupled with very
low RH have brought red flag conditions.

NBM probabilities of wind gusts >= 39 mph today are 50 to 90
percent in across the Cascade Gaps, Basin, Gorge and Kittitas
Valleys. However, percentages drop to 30 to 50 percent for wind
gusts >=47 mph. For Sunday, wind gust probabilities >=39 mph are
isolated 30 to 70 percent and 20 percent or less for >=47 mph.
On Tuesday, wind gust probabilities >=39 mph are 40 to 80
percent in these same areas.

Diurnal breezes will continue for much of the upcoming week, but
they will be less than today. Sunday and Tuesday look to be the
breeziest days after today with winds in the normally windier
locations in the 20 to 25 mph range. At this point, it looks as
though criteria for red flag warnings will not be met, but will
have to keep an eye on this.

Otherwise, overall, it looks like a fairly quiet week, with dry
weather and temperatures slightly above normal.

&&

.AVIATION /18Z TAFS THROUGH 18Z SUNDAY/...VFR conditions to
prevail through the period. Low chances (<15%) that smoke
impacts will be seen at sites through the period. Breezy winds
12-20kts with gusts up to 30kts will be possible across all
sites this afternoon into the evening, with light winds
developing overnight. Site DLS will see slightly stronger winds,
20-25kt sustained with gusts to around 35kts. Lawhorn/82


&&

.FIRE WEATHER...
Red flag warnings have been issued as the combination of low RH
and winds which are expected to gust upwards of 30 mph this
afternoon will create critical conditions. Diurnal breeziness
is expected for much of the upcoming week, with Sunday and
Tuesday looking to be the windier days. At this point, wind
gusts look to be in the 20 to 25 mph range, possibly as high as
30 mph. Conditions look to be elevated but not reaching red flag
criteria but will need to monitor this as time progresses.

&&

.Preliminary Point Temps/PoPs...
PDT  89  54  88  55 /   0   0   0   0
ALW  92  60  90  61 /   0   0   0   0
PSC  94  59  92  59 /   0   0   0   0
YKM  89  57  90  58 /   0   0   0   0
HRI  91  58  90  59 /   0   0   0   0
ELN  86  53  84  54 /   0   0   0   0
RDM  89  49  88  50 /   0   0   0   0
LGD  96  55  92  56 /   0   0   0   0
GCD  95  54  93  54 /   0   0   0   0
DLS  84  60  86  60 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
WA...Red Flag Warning until 8 PM PDT this evening for WAZ690-691.
     Air Quality Alert until 11 AM PDT Monday for WAZ028>030.
OR...Red Flag Warning until 8 PM PDT this evening for ORZ691-697-
     698-700-704.
     Air Quality Alert until noon PDT Monday for ORZ049-050-502-503-
     505-506-508-509-511.

&&

$$

DISCUSSION...77
AVIATION...82
FIRE WEATHER...90