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URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Portland OR
312 AM PST Mon Dec 8 2025

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

...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.

&&

$$

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