Cascade Head to Florence OR from 10 to 60 NM Marine Forecast
| Rest Of Today...S Wind To 5 Kt. Wind Waves S 1 Ft At 4 Seconds. Nw Swell 3 Ft At 9 Seconds. Widespread Dense Fog In The Morning. Areas Of Dense Fog In The Afternoon. |
| Tonight...N Wind To 5 Kt. Wind Waves N 1 Ft At 4 Seconds. Nw Swell 3 Ft At 9 Seconds. Areas Of Dense Fog In The Evening. Patchy Dense Fog After Midnight. |
| Wed...Ne Wind 5 Kt, Backing To Nw To 5 Kt In The Afternoon. Wind Waves Ne 1 Ft At 4 Seconds, Shifting To The Nw At 4 Seconds In The Afternoon. Nw Swell 3 Ft At 9 Seconds. Patchy Dense Fog In The Morning. |
| Wed Night...Nw Wind 5 Kt, Backing To Se After Midnight. Wind Waves Nw 1 Ft At 4 Seconds, Shifting To The Se At 4 Seconds After Midnight. Nw Swell 3 Ft At 9 Seconds. |
| Thu...S Wind 5 Kt. Wind Waves S 1 Ft At 4 Seconds. Nw Swell 3 Ft At 10 Seconds. |
| Thu Night...N Wind 5 To 10 Kt. Wind Waves N 2 Ft At 4 Seconds. Nw Swell 3 Ft At 10 Seconds. |
| Fri...N Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 4 Ft. |
| Sat...Nw Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 4 Ft. |
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Area Forecast Discussion National Weather Service Portland OR 413am PST Sat Feb 15 2025 Synopsis A frontal system arrives late this afternoon, returning widespread rain and snow in the Cascades through Sunday. The Upper Hood River Valley will continue to see winter weather impacts Saturday night into Sunday morning, mainly from snow and/or freezing rain. Expect more milder temperatures early next week, with another weather system arriving mid-week. .SHORT TERM...Now through Monday Night...A low pressure system over the NE Pacific will support lowland rain and mountain snow across the Pacific Northwest this weekend. As of 3am PST, radar and satellite imagery depicts the associated warm front approaching SW Washington and far NW Oregon. High clouds are beginning to filter in from this system, which will help keep temperatures above freezing (32F) across the lowlands as well as prevent additional fog development. Fog already formed within the Tualatin Valley and parts of the west Central Willamette Valley earlier in the night, which will likely stick around through mid-morning. As the aforementioned warm front lifts this morning over far NW Oregon and SW Washington, we'll see light rain and light mountain snow, mainly north of Tillamook/Yamhill/Clackamas counties. Areas southward remain mostly dry through the early afternoon. By 3-5pm Saturday, the trailing cold front will push through, bringing more widespread rain and mountain snow to the area through Sunday. Precipitation will begin along the coast and gradually spread inland through the evening. 24 hour rainfall amounts ending 4pm Sunday are forecast around 0.70-1 inch along the coast and 0.40-0.60 inch for interior lowland valleys. Between Saturday afternoon and Monday morning, the Cascades could receive up to 20-22 inches of total snow from this system, with a 5-15% chance of 2 feet or more at pass- level. Forecast snow amounts have increased from the previous forecast package as forecast Quantitative Precipitation Forecast amounts are now higher. Therefore, the previous Winter Weather Advisories in the Cascades have been upgraded to Winter Storm Warnings. Those traveling through the Cascades should prepare for winter weather and refer to ODOT/WSDOT for the latest road conditions and restrictions. Another area of concern during this system will be central Columbia River Gorge (east of Cascade Locks) and the Upper Hood River Valley. Surface temperatures tonight into Sunday in the Upper Hood River Valley are forecast to fall below freezing, which would support another round of wintry precipitation. Confidence is high in the occurrence of winter precipitation, but only moderate on precipitation type. Latest guidance suggests periods of both snow and/or freezing rain for the Upper Hood River Valley as temperatures aloft fluctuate between freezing and just above freezing. The latest HREF indicates a 60-70% chance of at least 1 inch of snow by then and a 50-70% chance of at least a glaze of freezing rain (mainly above 1000 ft in the Upper Hood River Valley). The Winter Weather Advisory for the Upper Hood River Valley remains in effect from 4pm Saturday to 1 PM, with the bulk of the winter precipitation falling between 10pm Saturday and 10am Sunday. There is a little more uncertainty in winter precipitation for the central Columbia River Gorge as model guidance indicates low temperatures will hover more or less around 32F. Decided to trend slightly below freezing for Sunday morning lows in the Gorge as a light easterly wind could keep things cooler. For now, the forecast calls for around a trace to 0.5 inch of snow in the Gorge. Showers continue into Monday, all rain except for over the Cascades as temperatures moderate even more. Low temperatures Monday morning are forecast to be firmly above freezing for most locations west of the Cascades and even most of the Upper Hood River Valley. Daytime temperatures Monday are slated to peak around 50 degrees for the lowlands as well. -Alviz/HEC Long Term Tuesday through Friday...By Tuesday, ensemble guidance is in high agreement in a quick ridge breezing over the PacNW in between weather systems. Mostly dry weather is expected except for a few showers over the Cascades and Coast Range. Temperatures also continue to warm with lowland high temperatures in the low to mid 50s and overnight temperatures only dropping to the 40s. Ensemble guidance suggests a quick-hitting weather system will bring additional widespread precipitation to the region late Tuesday through Wednesday. Once again rain is expected for most locations west of the Cascades, including the lowlands, but snow is possible once again in the Upper Hood River Valley and central Columbia River Gorge. There is lower confidence in specifics at this time on snow probabilities and amounts, but a rain/snow mix is possible during the warmer daytime hours with better chances of snow in the colder overnight and early morning hours. Snow is also likely to return over the Cascades. No significant impacts are expected with this system at this time, but keep an eye on the forecast as details change. -HEC/Alviz Marine Low pressure moves inland today which will continue the small craft seas and wind gusts over the next 24 hours. There will be a brief lull in conditions this morning through around 10 AM, but then winds will ramp up once again as they become southerly. Speeds of 20-25 kt with gusts up to 30 kt are expected. However, period of Gale Force Winds (gusts around 34 kt) are possible in the far outer waters of PZZ272-273. Because they are not widespread and will generally last for 6 hours or so, have not issued a Gale Force Wind Warning at this time. If the low pressure system intensifies or moves further south, winds will increase and the hazard may be upgraded. Will continue to watch the low track through the morning. Seas will build from 8-9 ft at 15 seconds, to near 10 ft by Sunday afternoon. Behind the front associated with the low, seas will build further to 14 ft at 15 seconds. Hazardous seas are likely during this time. Winds will be less than 25 kt. -Muessle .BEACH HAZARDS...A long period westerly swell is entering our coastal waters today at around 9 ft at 14 to 15 seconds and building towards 12 ft at 15 seconds by Sunday. This will result in an increased threat for sneaker waves across all our beaches. Beachgoers should remain vigilant for waves occasionally running up much farther onto the beach than background wave conditions. Stay off of rocks, jetties and logs. Never turn your back on the ocean. -42 NOAA Portland OR Office: Watches - Warnings - Advisories OR...Winter Weather Advisory from 4pm this afternoon to 1pm PST Sunday for ORZ121. Winter Storm Warning from 10pm this evening to 10am PST Monday for ORZ126>128. WA...Winter Storm Warning from 10am this morning to 10am PST Monday for WAZ211. PZ...Small Craft Advisory until 7pm PST Sunday for PZZ210-251>253- 271>273. |
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