Mitchell, Oregon Weather Forecast Discussion

589
FXUS66 KPDT 251104
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
404 AM PDT Thu Sep 25 2025
Updated Aviation Discussion
.AVIATION...12z TAFs...VFR conditions expected. The morning will
start off clear with light, terrain-driven winds less than 10 kts,
before a dry cold front sweeps through the region this afternoon and
causes an increase in winds out of the W and NW. Gusts could reach
over 30 kts at times across some sites, especially DLS and PDT.
Winds will back off heading into the evening and overnight hours,
pulling more W and SW less than 12 kts, with cigs becoming sct-bkn
around 15 kft. Evans/74
&&
.PREV DISCUSSION... /issued 335 AM PDT Thu Sep 25 2025/
DISCUSSION...
A weak dry cold front will pass over the region Today, creating
conditions for locally driven downslope mountain gap winds and
resultant impacts to fire weather.
Noon to roughly midnight will be the timeframe to expect breezy
to windy conditions through the Cascade Gaps and areas downstream.
West winds developing from The Dalles to Hermiston could gust to
around 35 mph commonly while farther north in the Kittitas valley,
gusts in the 45 to 50 mph range look possible based on NBM 75th
percentile members.
Not counting the cooler air on Friday behind the cold front, the
downsloping winds will contribute to warmer temperatures in the
80s across most of the lower elevations through Sunday. As a
surface trough/dry cold front exits the region Tonight, the
relaxing pressure gradients allow the winds to weaken in the windy
areas and temperatures Friday become capped in the 70s across the
lowers elevation and even 60s and upper 50s in some of the
Eastern Mountains.
Large Fire Potential (weather component) is enhanced across the
Kittitas valley and Columbia Gorge/Basin areas beginning by around
noon Today, and tapering off this evening. The Kittitas valley
hangs onto the enhanced fire weather conditions a bit longer and
winds are slower to subside in these areas as also pointed to by
the wind advisory for the valley which is in effect beyond
midnight. The Red Flag Warnings continue for the same areas; Fire
Zones WA690 WA695 WA691 OR691 OR701 OR703.
Winds and fire weather impacts will subside on Friday as high
pressure develops across the region behind the exiting front. By
the middle of the weekend, more cloud cover, a bump in moisture
small (under 10%) chances for thunder but a more robust 40-60 %
chance for showers across the eastern mountains and a 20-40%
chance everywhere else in the Monday, Monday night and early
Tuesday timeframe. 71/RUSSELL
&&
.PRELIMINARY POINT TEMPS/POPS...
PDT  82  46  72  46 /   0   0   0   0
ALW  82  50  72  51 /   0   0   0   0
PSC  83  46  74  45 /   0   0   0   0
YKM  82  45  75  48 /   0   0   0   0
HRI  83  47  74  46 /   0   0   0   0
ELN  73  43  71  45 /   0   0   0   0
RDM  82  35  73  38 /   0   0   0   0
LGD  84  42  71  43 /   0   0   0   0
GCD  85  40  73  44 /   0   0   0   0
DLS  78  49  78  51 /   0   0   0   0
&&
.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Red Flag Warning from 1 PM this afternoon to 11 PM PDT this
     evening for ORZ691-701-703.
WA...Red Flag Warning from 1 PM this afternoon to 11 PM PDT this
     evening for WAZ691.
Red Flag Warning from 11 AM this morning to 11 PM PDT this
     evening for WAZ690-695.
Wind Advisory from 11 AM this morning to 2 AM PDT Friday for
     WAZ026.
&&
$$
SHORT TERM...71
LONG TERM....71
AVIATION...74

NWS PDT Office Area Forecast Discussion