FXUS66 KPDT 072142 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 242 PM PDT Sun Apr 7 2019 .SHORT TERM...Tonight through Wednesday. Deep plume of moisture will continue to move across the region with a strong southwest flow aloft. Satellite and models indicate several weak lows moving along the boundary which overlays the forecast area tonight into Monday. Each of these will enhance the rainfall. Still expect the heaviest rain to be over the Cascades and across central and northeast Oregon. River forecasts continue to show rises on most rivers and streams into early next week. Several will reach bankfull Mon-Tue. FLS and RVS products detail the hydrologic impacts. An upper level trough will then move across the region Mon night and Tuesday. Steady rain Mon night will change to showers Tue. Fairly strong surface high building in with breezy to windy conditions during the day. A brief break Tue night then the next upper trough moves through Wednesday with additional rain. 94 .LONG TERM...Wednesday Night through Sunday...An active and unsettled weather pattern will continue through much of the long term period. Initially there will be a ridge offshore and a large trough over the Rockies and Midwestern states. Our area will be on the boundary between the ridge and the trough under a northwest flow. Wednesday night models bring an upper low or wave into the area late Wednesday night and Thursday though there are differences in strength, timing and path. This will bring a chance of rain and mountain snow to the area before tapering off Thursday night. The Columbia Basin will be mostly dry. Snow levels will drop to 3500- 4000 feet. Friday and Friday night will be a break between systems though a northwest flow will keep a slight chance of rain and snow showers in the mountains and central Oregon during the day on Friday. Another low is expected on either Saturday or Saturday night and continuing through Sunday with a slight chance of lower elevation rain and a chance of mountain rain and snow with snow levels around 5000 feet. Temperatures will be in the mid 50s to mid 60s with upper 40s to mid 50s in the mountains. Lows will be in the mid 30s to mid 40s with mid 20s to mid 30s in the mountains. Perry && .AVIATION...18Z TAFs...Scattered to widespread rain, moderate at times, expected at TAF sites through the period, though it will be limited to after 00Z at KYKM and KPSC. Though ceilings are mainly VFR, MVFR and brief IFR conditions are possible, especially with the heavier showers. Mountain obscuration possible as well. Southwest to northwest winds generally around 10-20 kts through this afternoon before tapering off this evening. Gusts up around 25 kts possible today at KBDN and KRDM. Perry && .PRELIMINARY POINT TEMPS/POPS... PDT 45 59 41 55 / 80 80 60 40 ALW 47 61 44 57 / 80 70 60 50 PSC 47 64 44 63 / 80 60 40 30 YKM 41 62 40 61 / 80 70 40 20 HRI 46 64 43 61 / 80 70 50 30 ELN 39 57 37 55 / 70 70 40 20 RDM 44 56 36 50 / 80 80 70 40 LGD 43 55 38 48 / 80 90 80 70 GCD 44 56 38 48 / 80 100 80 60 DLS 45 61 43 58 / 90 80 50 20 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. && $$ 94/83/83