Coastal Flood Advisory issued December 18 at 6:28PM PST until December 19 at 4:00PM PST by NWS Portland OR
Issue date: 2025-12-19T02:28+00:00
* WHAT...Tidal overflow flooding expected. * WHERE...North and Central Coast of Oregon. * WHEN...From 10 AM to 4 PM PST Friday. The highest threat for minor flooding is during the high tides from 11 AM to 1 PM PST. * IMPACTS...Minor flooding and erosion, up to one foot 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 overflow concerns are due to the combination of high river levels and high tides.
Flood Warning issued December 18 at 5:35PM PST until December 19 at 1:20PM PST by NWS Portland OR
Issue date: 2025-12-19T01:35+00:00
...The Flood Warning continues for the following rivers in Washington...Oregon... Grays River at Covered Bridge near Rosburg affecting Wahkiakum County. Hood River Near Hood River affecting Hood River County. Siuslaw River near Mapleton affecting Lane County. ...The Flood Warning is extended for the following rivers in Oregon...Washington... Nehalem River near Foss affecting Tillamook and Clatsop Counties. Siletz River at Siletz affecting Lincoln County. Wilson River near Tillamook affecting Tillamook County. Cowlitz River at Kelso affecting Cowlitz County. Clackamas River at Estacada affecting Clackamas County. Trask River near Tillamook affecting Tillamook County. Marys River near Philomath affecting Benton County. Luckiamute River near Suver affecting Polk and Benton Counties. * WHAT...Moderate flooding is forecast. * WHERE...Nehalem River near Foss. * WHEN...Until early Friday afternoon. * IMPACTS...Above 20.0 feet, flooding of some buildings in the town of Nehalem begins, with the situation worsening during the high tide. Also expect widespread low land flooding and numerous flooded rural roads from the Foss gauging station downstream to Nehalem. * ADDITIONAL DETAILS... - At 4:15 PM PST Thursday the stage was 14.1 feet. - Bankfull stage is 13.0 feet. - Forecast...The river is expected to rise above flood stage this evening and crest around 21.1 feet tonight. It will then fall below flood stage Friday afternoon. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
Flood Watch issued December 18 at 4:24PM PST until December 20 at 4:00PM PST by NWS Portland OR
Issue date: 2025-12-19T00:24+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...Through Saturday afternoon. * 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 today. This system occurs 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 today, 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 tonight into Friday, with numerous area rivers now forecast to reach at least Minor flood stage. Slower reacting rivers may stay in flood stage into Saturday afternoon. - http://www.weather.gov/safety/flood
