Flood Watch
Status
Event Extended (Time) Active alertStart Time
Mon 12/08/2025 01:00 PM ESTEnd Time
Fri 12/12/2025 07:00 AM ESTSignificance
WatchImpacts
Moderate impact
Locations Affected
Portland, OR ∙ Eugene, OR ∙ Salem, OR ∙ Vancouver, WA ∙ Gresham, OR ∙ Hillsboro, OR ∙ Beaverton, OR ∙ Springfield, OR ∙ Corvallis, OR ∙ Albany, ORFull Alert Message
URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Portland OR 312 AM PST Mon Dec 8 2025 ...FLOOD WATCH NOW IN EFFECT FROM 10 AM PST THIS MORNING THROUGH LATE THURSDAY NIGHT... * WHAT...River and urban flooding caused by excessive rainfall is possible. Landslides possible in areas of steep terrain, and debris flows possible over recently burned areas. * WHERE...Counties in Oregon: Benton, Clackamas, Clatsop, Columbia, Hood River, Lane, Lincoln, Linn, Marion, Multnomah, Polk, Tillamook, Washington, and Yamhill. Counties in Washington: Clark, Cowlitz, Pacific, Skamania, and Wahkiakum. * WHEN...From 10 AM PST this morning through late Thursday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. 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... - A prolonged atmospheric river is expected to bring periods of heavy rain to northwest Oregon and southwest Washington Monday through Wednesday, with periods of lighter rain continuing Thursday into Friday. This weather system will result in an increased risk for flooding. Forecast rain amounts from 4 AM Monday through 4 AM Thursday range from 4 to 6 inches in the Cowlitz Valley, lower Columbia, Portland/Vancouver metro and northern Willamette Valley, 2 to 4 inches in the central Willamette Valley, and 1.5-2.5 inches in the southern Willamette Valley. Forecast rain amounts reach 6 to 12 inches in the Cascades, Cascade foothills, Coast Range and the coast, except 2-4 inches from Florence to Newport and in areas of higher terrain in Lane County. Rivers draining the coastal mountains and several Willamette Tributaries have a 30 to 60% chance of reaching minor flood stage or higher. The Pudding River at Aurora and Johnson Creek at Sycamore have an 80% chance of reaching minor flood stage or higher. Chances for flooding along the Willamette mainstem remains low at 5-15%. Urban flooding is possible and water on roadways will increase the risk of hydroplaning and car accidents. Landslides in areas of steep terrain will be possible, as well as debris flows over recently burned areas. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Technical Header
ORZ101>128-WAZ201>211-090030- /O.EXT.KPQR.FA.A.0003.251208T1800Z-251212T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Clatsop County Coast-Tillamook County Coast-Central Coast of Oregon-North Oregon Coast Range Lowlands-Central Oregon Coast Range Lowlands-North Oregon Coast Range-Central Oregon Coast Range-Lower Columbia River-Tualatin Valley-Portland West Hills and Chehalem Mountain-Inner Portland Metro-East Portland Metro- Outer Southeast Portland Metro-West Central Willamette Valley- East Central Willamette Valley-Benton County Lowlands-Linn County Lowlands-Lane County Lowlands-West Columbia River Gorge of Oregon above 500 ft-West Columbia River Gorge I-84 Corridor-Upper Hood River Valley-Central Columbia River Gorge I-84 Corridor-Clackamas County Cascade Foothills-Cascade Foothills of Marion and Linn Counties-Lane County Cascade Foothills-North Oregon Cascades- Cascades of Marion and Linn Counties-Cascades of Lane County- South Washington Coast-Willapa and Wahkiakum Lowlands-Willapa Hills-Cowlitz County Lowlands-North Clark County Lowlands-Inner Vancouver Metro-East Clark County Lowlands-South Washington Cascade Foothills-West Columbia River Gorge SR 14 Corridor- Central Columbia River Gorge SR 14 Corridor-South Washington Cascades- Including the cities of Skyline Drive, Corvallis, Newberg, Pacific City, Rhododendron, Ridgefield, Tokeland, Keizer, Valsetz, Harrisburg, Waldo Lake, Toutle, Vancouver, Santiam Junction, Glenwood, Battle Ground, Waldport, Boring, Breitenbush Springs, Vernonia, Salem, Corbett, Springfield, McKenzie Pass, Sheridan, Brightwood, Sylvan Hill, Kelso, Brownsville, Alma, Willapa, Sunset Summit, Salmon Creek, Kalama, Tillamook, Raymond, Longview, Woodburn, Seaside, Bennett Pass, Silver Falls, Yacolt, Happy Valley, Parkdale, Knappa, Multnomah Falls, Cathlamet, Amboy, Silverton, Philomath, Tigard, Odell, Wyeth, Stayton, Alsea, Tombstone Summit, Stevenson, Scappoose, Evergreen, Beacon Rock SP, Manzanita, Astoria, Albany, Naselle, Eagle Creek, Sandy, Government Camp, Woodland, North Bonneville, Lebanon, Lebam, Carson, Bonneville, Horton, Indian Heaven Wilderness, Mary's Peak, Dallas, Fairview, Hillsboro, Mill City, Forest Grove, Lincoln City, Molalla, Lake Merwin, Eugene, La Center, Rainier, Rosburg, McMinnville, Clatskanie, Warrenton, Brush Prairie, Mapleton, Cherryville, Oregon City, Grand Ronde Indian Reservation, Lake Oswego, Sherwood, Grand Ronde, Chehalem Mountain, Willamette Pass, Neskowin, Wilsonville, Welches, Wilson River Summit, Vida, Oakridge, Rockaway Beach, Junction City, Cascade Locks, Gresham, Troutdale, Estacada, Monmouth, McKenzie Bridge, Washougal, Newport, Florence, Castle Rock, Creswell, Brooklyn, Underwood, Jewell, Mt. St. Helens, Necanicum, Camas, Cape Horn, Hood River, Hockinson, Long Beach, Larch Mountain, St. Helens, Hoskins, Cannon Beach, Rockcreek, Ocean Park, Lost Lake, Rooster Rock, Portland, Sellwood, Timothy Lake, Santiam Pass, Cottage Grove, Monroe, and Detroit 312 AM PST Mon Dec 8 2025
