Area Forecast Discussion
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
089 FXUS66 KPDT 190533 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 1033 PM PDT Wed Jun 18 2025 .Updated Aviation Discussion. .AVIATION...06Z TAFS...VFR conditions currently across all sites, which will stay the course through the period. Winds will continue to subside overnight before picking up again through the afternoon for KDLS/KRDM/KBDN with gusts of 20-25 kts, increasing to 25-30 kts into the evening. Clear skies overnight, but 20-25kft sct-bkn clouds will build across all sites over the late morning/early afternoon hours. 75 && PREV DISCUSSION... /issued 142 PM PDT Wed Jun 18 2025/ SHORT TERM...today through Saturday morning...Radar depicts clear skies across our CWA, however its a different story with stratus covering most of the area west of the Cascades. This has caused some temperature gradient between the regions, and as a result has enhanced the winds near the gap in the Cascades. Nothing to suggest Wind Advisory at this time since intensity and/or area coverage doesn`t suffice to issue a highlight. The rest of the short term will be characterized as the trough system moving from the Pacific into our region. Moisture advection and increased vorticity values in the mid-levels will result in some slight chance of thunderstorms across the Eastern Mountains Friday morning. Area coverage of light precip becomes widespread by Friday afternoon into Friday evening as that system moves closer to the region. Most areas will experience <.10" of precip (>85% chance) with higher values located in the higher peaks Snow levels will drop to around 5500-6000 feet, resulting in some light mountain snow for portions of the mountain regions. Not expected to reach a critical amount of QPF regarding mountain snow (<.10") and any is expected to last no more than a few hours. A brief break in precip (especially across portions of the BAsin) is expected in the early moorings Saturday as the mid-level system passes through the region. LONG TERM...Saturday morning through Wednesday...Following the system from Saturday morning, it will pass to the east heading into the later part of the weekend. As the system moves east, wrap-around precip will again bring light rain chances. Chances for some light mountain snow returns late Saturday morning/afternoon with snow levels dropping to 5000-5500 feet (65-75% chance), reserving the chances to the higher peaks in the mountain regions. Precip chances decrease significantly region wide heading from Sunday evening onwards as the trough continues to push east and have less influence on the overall weather pattern. This is thanks to the mid-level pattern becoming more zonal orientated, cutting off moisture advection. Temperatures will start a warming trend Monday onwards thanks to clearing skies and lack of precipitation. Will need to monitor how intense temperatures will become moving forward, but NBM currently advertises highs in the 90s across much of the Basin by Wednesday. Confidence is currently low to medium if temperatures reach this high. && .PRELIMINARY POINT TEMPS/POPS... PDT 49 78 53 69 / 0 0 10 10 ALW 52 78 56 67 / 0 0 10 20 PSC 52 81 54 74 / 0 0 0 10 YKM 49 80 54 72 / 0 0 0 20 HRI 51 80 55 71 / 0 0 0 10 ELN 48 76 51 66 / 0 0 0 20 RDM 40 74 40 60 / 0 0 0 30 LGD 48 77 50 62 / 0 0 20 30 GCD 47 82 48 63 / 0 0 20 20 DLS 53 76 54 66 / 0 0 0 20 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. && $$ SHORT TERM...95 LONG TERM....95 AVIATION...75