textproduct: Pendleton

AVIATION

18Z TAFS...Generally MVFR and IFR conditions were occurring across the region. Expect much of the same through the day, with some areas possibly improving a bit during the afternoon, then decreasing ceilings overnight. Winds are expected to be light.

PREV DISCUSSION

/issued 155 AM PST Wed Jan 21 2026/

DISCUSSION...The forecast is more or less status quo. A low cloud deck remains situated across pretty much the entirety of the forecast area below 4000 feet. Patchy fog can be observed in the Wallowa and John Day Valley, as well as portions of central and north central Oregon. Freezing Fog Advisories are in effect for north central Oregon and the Wallowa Valley through around late morning Wednesday. With a dry NW flow pattern over the PacNW, don't expect this cloud deck to change much (outside of the fringes) until perhaps Friday, which will at the very least initiate a pattern change that in due time will eventually scourge out this gloom.

Precip threats are pretty minimal in the near future, however global models do hint at an upper-level jet overhead during the day Friday. While moisture advection with this jet looks to be limited due to its more Arctic origin, this pattern could still bring in enough instability and surface winds to at least partially mix out the low cloud deck. Confidence in this occurring is only low-moderate (40- 50%), as guidance still overall suggests a dry forecast with only light winds generally less than 15 mph, but any kind of mechanical mixing would be welcomed just so we can see the sun again.

Consensus across ensembles, however, is to introduce a more active, progressive pattern for the region starting late weekend and lasting around midweek. While nothing in the synoptic pattern suggests an impactful precip or wind threat, our primary issue with regards to this low cloud deck has been the presence of a stagnant, stable pattern, so this at the very least looks to be a brief break from that. Emphasis is on brief, however, as ensembles generally agree that ridging will return to the region midweek onward. 74

AVIATION...12z TAFs...Variable conditions currently across all sites, with MVFR at KDLS/KPDT/KYKM/KALW/KPSC and LIFR at KRDM/KBDN due to reduced ceilings of 200-300 feet. These conditions are expected persist, with dropping ceilings at KPDT/KALW leading to IFR ceilings of 800-900 feet this morning. Elsewhere, conditions will stay constant through the morning before improving to MVFR briefly for all terminals through the afternoon, with the exception of KRDM/KBDN only improving to IFR due to ceilings staying below 1kft. Upper level ridging and surface high pressure extends through the period, keeping conditions dry and winds light (below 10 kts). 75

PRELIMINARY POINT TEMPS/POPS

PDT 31 21 34 21 / 0 0 0 0 ALW 32 24 33 23 / 0 0 0 0 PSC 35 24 35 23 / 0 0 0 0 YKM 35 22 35 20 / 0 0 0 0 HRI 33 24 35 22 / 0 0 0 0 ELN 33 21 33 20 / 0 0 0 0 RDM 38 17 41 17 / 0 0 0 0 LGD 39 21 39 20 / 0 0 0 0 GCD 47 21 44 21 / 0 0 0 0 DLS 37 26 38 26 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

OR...Freezing Fog Advisory until noon PST today for ORZ510.

WA...None.