Flood Warning issued December 18 at 10:30AM PST until December 19 at 1:09PM PST by NWS Portland OR
Issue date: 2025-12-18T18:30+00:00
...The National Weather Service in Portland OR has issued a Flood Warning for the following rivers in Oregon...Washington... Nehalem River near Foss affecting Tillamook and Clatsop Counties. Grays River at Covered Bridge near Rosburg affecting Wahkiakum County. ...Forecast flooding changed from Minor to Moderate severity and increased in duration for the following rivers in Oregon... Wilson River near Tillamook affecting Tillamook County. * 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 9:15 AM PST Thursday the stage was 11.4 feet. - Bankfull stage is 13.0 feet. - Forecast...The river will rise above flood stage this afternoon and crest around 21.0 feet late this evening. It will then fall below flood stage Friday morning. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
Flood Watch issued December 18 at 2:42AM PST until December 20 at 4:00PM PST by NWS Portland OR
Issue date: 2025-12-18T10:42+00:00
* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Northwest Oregon and southwest Washington including the following counties. In Oregon: Benton, Clackamas, Clatsop, Columbia, Hood River, Lane, Linn, Lincoln, Marion, Multnomah, Polk, Tillamook, Washington, and Yamhill. In Washington: Clark, Cowlitz, Pacific, Skamania, and Wahkiakum. * 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
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.
