Area Forecast Discussion
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
450 FXUS66 KPDT 110600 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 1100 PM PDT Thu Jul 10 2025 Updated Aviation Discussion .AVIATION...06Z TAFs...VFR conditions are forecast through the valid period for all sites. Skies will be mostly clear, and winds will be diurnally and terrain-driven. Plunkett/86 && .PREV DISCUSSION... /issued 126 PM PDT Thu Jul 10 2025/ SHORT TERM...Today through Saturday...Breezy conditions prevail through the Cascade Gaps and into the Basin this afternoon in the wake of an upper-level trough that brought stronger winds to the forecast area last night. Once this system is out of our area of influence, a dry and hot pattern will take hold through at least the midweek next week. Until then, expect relatively seasonable temperature readings, with the heat initially starting to ramp up on Saturday. RHs will drop off over the weekend as a result of this building heat, stemming from a broad ridge building over the PacNW, but this ridge will help even out pressure gradients, keeping winds primarily thermally-induced through the Cascade Gaps. The expectation, however, is that winds will not be strong enough to cause critical fire weather conditions, at least in the short term. Evans/74 LONG TERM...Sunday through Thursday...Heat continues through the first half of next work week, with temps expecting to peak on Sunday with highs over 100 across much of the Basin, before deterministic guidance depicts a shortwave clipping us to our northeast on Tuesday. While this system is not anticipated to bring us any rain, it will remain significant for firefighting efforts in the sense that it will bring about a distinct wind change to the north and northeast after days of more typical westerly flow. Models as of now are not projecting particularly strong winds, but any distinct wind shift, especially toward the east, can greatly hinder firefighting coordination. Ensembles are a bit divided over what occurs synoptically Wednesday onward, but the general consensus appears to lean toward that of a progressive and relatively zonal pattern. Clustering, however, does not provide enough detail to go too much into detail on how the forecast is expected to evolve beyond the midweek next week, other than to at the very least expect a continuation of above-normal temperatures, breeziness through the Cascade Gaps, and little to no rain threats for the time being. Evans/74 && .PRELIMINARY POINT TEMPS/POPS... PDT 59 91 62 97 / 0 0 0 0 ALW 63 91 66 95 / 0 0 0 0 PSC 59 94 63 98 / 0 0 0 0 YKM 59 93 65 98 / 0 0 0 0 HRI 60 94 63 99 / 0 0 0 0 ELN 58 93 65 93 / 0 0 0 0 RDM 48 88 51 95 / 0 0 0 0 LGD 56 87 57 92 / 0 0 0 0 GCD 53 89 54 93 / 0 0 0 0 DLS 62 93 65 95 / 0 0 0 0 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. && $$ SHORT TERM...74 LONG TERM....74 AVIATION...86