Coastal Flood Advisory issued December 18 at 12:14AM PST until December 18 at 4:00PM PST by NWS Portland OR
Issue date: 2025-12-18T08:14+00:00
* WHAT...Tidal overflow flooding expected due to a combination of high tides and increased flow along coastal rivers. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...From 8 AM to 4 PM PST Thursday. * IMPACTS...Minor flooding, up to one above ground level, during high tides is expected in the low lying areas near bays, sloughs, and the lower reaches of the coastal rivers. * ADDITIONAL DETAILS...The tidal gauge in Toke Point, Astoria, and Garibaldi are all forecast to see tides of 9.5 ft or higher. When combined with high flow rates from heavy rain, tidal overflow concerns increase.
Wind Advisory issued December 17 at 8:37PM PST until December 18 at 7:00PM PST by NWS Portland OR
Issue date: 2025-12-18T04:37+00:00
* WHAT...South winds 15 to 20 mph with gusts up to 45 mph expected. * WHERE...Greater Portland/Vancouver Metro, Willapa Hills and Adjacent River Valleys of Pacific and Wahkiakum Counties, Lower Columbia River and Cowlitz River Valleys, North Oregon Coast Range Lowlands, North Oregon Coast Range, and South Washington Cascade Foothills. * WHEN...From 8 AM to 7 PM PST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.
High Wind Warning issued December 17 at 8:37PM PST until December 18 at 7:00PM PST by NWS Portland OR
Issue date: 2025-12-18T04:37+00:00
* WHAT...Southwest winds 20 to 30 mph with gusts up to 60 mph possible. * WHERE...Central Coast of Oregon and Central Oregon Coast Range. * WHEN...From 8 AM to 7 PM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.
Flood Warning issued December 17 at 4:53PM PST until December 19 at 12:00PM PST by NWS Portland OR
Issue date: 2025-12-18T00:53+00:00
...The National Weather Service in Portland OR has issued a Flood Warning for the following rivers in Oregon... Clackamas River near Oregon City affecting Clackamas County. ...Forecast flooding changed from Minor to Moderate severity and increased in duration for the following rivers in Oregon... Siletz River at Siletz affecting Lincoln County. * WHAT...Moderate flooding is forecast. * WHERE...Siletz River at Siletz. * WHEN...From Thursday afternoon to early Friday afternoon. * IMPACTS...Above 20.0 feet, expect widespread flooding downstream. Increased flooding can be expected in the housing development downstream from Mack Landing. Numerous private roads and a trailer park between mile post 2.5 and mile post 5 near Sunset Landing to Coyote Rock are flooded. Flooding may be exacerbated during high tide. * ADDITIONAL DETAILS... - At 3:30 PM PST Wednesday the stage was 8.6 feet. - Bankfull stage is 12.0 feet. - Forecast...The river is expected to rise above flood stage Thursday afternoon and crest around 22.6 feet late Thursday evening. The river will fall below flood stage Friday morning. - Flood stage is 16.0 feet. - http://www.weather.gov/safety/flood
Flood Watch issued December 17 at 2:50PM PST until December 20 at 4:00AM PST by NWS Portland OR
Issue date: 2025-12-17T22:50+00:00
* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Oregon, including the following areas, Benton County Lowlands, Cascade Foothills of Marion and Linn Counties, Cascades of Lane County, Cascades of Marion and Linn Counties, Central Coast of Oregon, Central Columbia River Gorge I-84 Corridor, Central Oregon Coast Range, Central Oregon Coast Range Lowlands, Clackamas County Cascade Foothills, Clatsop County Coast, East Central Willamette Valley, East Portland Metro, Inner Portland Metro, Lane County Cascade Foothills, Lane County Lowlands, Linn County Lowlands, Lower Columbia River, North Oregon Cascades, North Oregon Coast Range, North Oregon Coast Range Lowlands, Outer Southeast Portland Metro, Portland West Hills and Chehalem Mountain, Tillamook County Coast, Tualatin Valley, Upper Hood River Valley, West Central Willamette Valley, West Columbia River Gorge I-84 Corridor and West Columbia River Gorge of Oregon above 500 ft and southwest Washington, including the following areas, Central Columbia River Gorge SR 14 Corridor, Cowlitz County Lowlands, East Clark County Lowlands, Inner Vancouver Metro, North Clark County Lowlands, South Washington Cascade Foothills, South Washington Cascades, South Washington Coast, West Columbia River Gorge SR 14 Corridor, Willapa Hills and Willapa and Wahkiakum Lowlands. * WHEN...From late tonight through late Friday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Storm drains and ditches may become clogged with debris. Area creeks and streams are running high and could flood with more heavy rain. Landslides and debris flows are possible during this flood event. People, structures, and roads located below steep slopes, in canyons, and near the mouths of canyons may be at serious risk from rapidly moving landslides. * ADDITIONAL DETAILS... - An atmospheric river is forecast to bring periods of heavy rain to northwestern Oregon and southwestern Washington at a time when area rivers continue to run high and soils remain saturated following heavy rain earlier in the month. During initial heavy rainfall on Thursday, the urban and small stream flooding threat will be most urgent, although the details of precise timing and location of the highest risk remains uncertain at this time. As runoff works its way downstream, the river flooding threat will increase Thursday night into Friday, with numerous area rivers now forecast to reach at least Minor flood stage. - http://www.weather.gov/safety/flood
High Wind Watch issued December 17 at 2:46PM PST until December 18 at 7:00PM PST by NWS Portland OR
Issue date: 2025-12-17T22:46+00:00
* WHAT...Southwest winds 20 to 30 mph with gusts up to 60 mph possible. * WHERE...Central Coast of Oregon and Central Oregon Coast Range. * WHEN...From Thursday morning through Thursday evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles.
