FXUS66 KPDT 251123 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 423 AM PDT Sat Oct 25 2025 .UPDATED AVIATION... .PREV DISCUSSION... /issued 214 AM PDT Sat Oct 25 2025/ DISCUSSION... The next few days look to bring fairly active weather across the region. An upper level low will move northeast towards southern British Columbia and a broad trough will move into the Pacific Northwest through the weekend. Several short waves will move through the trough. Precipitation is expected to increase this afternoon area-wide. Highest liquid equivalent QPF today will be in the Oregon Cascades where over an inch is expected with much less elsewhere and only a few hundredths in the lower elevations. There will be a lull in precipitation tonight before another round develops on Sunday. Liquid equivalent QPF will be highest on the Cascade Crest where over 1 inch is forecast with up to 0.50 inches in the Blues and 0.05 to 0.10 in the lower elevations. Snow levels will initially start off fairly high, between 4000-4500 feet in the Washington Cascades and between 6500-7500 feet elsewhere. However, they will drop during the day and into tonight as the trough moves onshore and will be around 4500-5000 feet in most areas late today and generally between 3000-3500 feet by Sunday morning. Snow levels will then rise a bit to between 3500-4500 feet by Sunday afternoon. Previously issued winter weather advisories will remain unchanged but will need to keep an eye on things as precipitation develops for any possible upgrades, especially over the Oregon Cascades. As the trough moves onshore, there will be a strong low level jet and there is high (70-90 percent probabilities) of winds reaching at least 45 mph or greater of much of the region, especially across the Columbia Basin, Simcoe Highlands and portions of central Oregon. The NBM shows probabilities of wind gusts >=39 mph of 90 percent or greater of much of the region. Them NBM probabilities of winds >= 47 mph range from 40 percent to 80 percent across the same areas. A wind advisory will be issued from late this afternoon to early Sunday morning. Also as the low level jet moves through, coupled with cool air aloft due to the trough, there is the possibility of a rumble of thunder, especially over far eastern Oregon this afternoon. Precipitation decreases Sunday night, though there will still be some low chances Monday. Tuesday looks mainly dry outside of the mountains as a ridge build in. A weak system could bring mainly mountain precipitation for Wednesday followed by drying Thursday and perhaps another weak system by the end of the week. AVIATION...125Z TAFs...VFR conditions will persist the forecast period. Winds overall will calm down to 10 kts and below for most sites, before revamping back up to 15-25 knots, with gusts up to 35 knots at all site except DLS by the early afternoon. LLWS of 25045kts at BDN around 00Z and 23045kts at ALW around 03Z. Precipitation will begin early to late morning seeping south to northwest and linger through 21-00Z. Possible isolated thunderstorms could develop (5-15%) at PDT/PSC between 21z-00z but confidence is low so did not add them into forecast as of now. 90 && .PRELIMINARY POINT TEMPS/POPS... PDT 63 38 55 35 / 90 30 70 40 ALW 61 41 55 38 / 100 40 70 60 PSC 62 39 56 34 / 90 20 60 30 YKM 54 34 52 29 / 100 40 60 20 HRI 62 39 56 35 / 90 20 60 30 ELN 50 29 47 27 / 100 50 60 30 RDM 55 29 49 25 / 90 50 90 30 LGD 58 31 51 31 / 90 50 80 60 GCD 59 33 49 30 / 90 30 80 40 DLS 58 41 54 39 / 90 70 90 40 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...Wind Advisory from 5 PM this afternoon to 7 AM PDT Sunday for ORZ041-044-507-508-510-511. Winter Weather Advisory from 8 AM Sunday to 8 AM PDT Monday for ORZ502. Winter Weather Advisory from 8 PM this evening to 2 AM PDT Monday for ORZ509. WA...Wind Advisory from 5 PM this afternoon to 7 AM PDT Sunday for WAZ024-027>029-521. Winter Weather Advisory from 8 AM Sunday to 8 AM PDT Monday for WAZ030. Winter Weather Advisory from 11 PM this evening to 11 PM PDT Sunday for WAZ522. && $$ SHORT TERM...77 LONG TERM....77 AVIATION...90