Lead
The Pacific Northwest is facing a second, more intense surge of subtropical moisture arriving Tuesday night into early Wednesday, after an initial atmospheric river soaked Western Washington overnight Monday into Tuesday. Soils are saturated and many rivers are already swollen; forecasts show record or near‑record crests for several river gauges, prompting flood watches and emergency activations across the region. Local officials and emergency managers are warning residents in low‑lying and flood‑prone areas to prepare for possible evacuations, power outages and infrastructure impacts. Authorities urge everyone to give extra time for travel, avoid flooded roads and monitor official alerts as conditions evolve.
Key Takeaways
- The State Emergency Operations Center moved to Level 1 activation on December 10, 2025, signaling a statewide, multiagency response if needed.
- The Skagit River is forecast to reach major flood stage Wednesday afternoon at Concrete and is expected to peak around 4 a.m. Thursday—about 15 feet above the major‑flood indicator and more than 5 feet above the previous record at that gauge.
- Snoqualmie Falls reached 17.8 feet early Tuesday and is forecast to climb to about 18.6 feet Wednesday night; prior comparable crests include 18.62 feet on Jan. 1, 2015 and much larger events in 1990 and 2009.
- Multiple counties, including Snohomish, have declared emergencies; road closures and rescues have already occurred (e.g., 11 people rescued in Lewis County, I‑5 exit closures near Napavine).
- Rainfall records were broken on Monday: Olympia 3.03 in, Quillayute 2.52 in and Hoquiam 2.92 in; mountains have seen 4–7 inches with more to come.
- The U.S. Army Corps of Engineers will increase releases from Mud Mountain Dam (White River) and Howard Hanson Dam (Green River) to manage reservoirs, which will raise downstream flows for days.
- Emergency shelters and sandbag distribution points have been opened in affected communities; the Red Cross established a shelter at the Evergreen State Fairgrounds in Monroe.
Background
Atmospheric rivers are narrow corridors of concentrated moisture that routinely affect the U.S. West Coast in fall and winter. This event is notable for its persistence and the volume of subtropical moisture it is transporting across the Pacific, producing prolonged heavy rain over lowlands and very heavy accumulations in the Cascades and Olympics. Rivers and reservoirs that absorbed the first pulse of rain are starting the second surge already near high flows, reducing their capacity to accommodate additional runoff.
Western Washington’s river system responds quickly when soils are saturated and tributaries deliver coincident flows; levees, bridges and low‑lying infrastructure that survived earlier storms are more vulnerable now. Local governments, county emergency managers and the National Weather Service have coordinated warnings, declared flood watches and activated response centers to coordinate resources such as sandbags, evacuations and sheltering. Historical floods in the region—particularly large events in 1990, 2009 and 2015—inform planning but each river basin reacts differently depending on snowpack, reservoir operations and where the heaviest rain falls.
Main Event
The initial pulse of the atmospheric river moved through Monday night into Tuesday, producing widespread urban and river flooding, road closures and emergency rescues. By Tuesday afternoon and evening, the forecast updated to show a stronger second surge arriving overnight Tuesday into Wednesday, with the greatest impacts expected through Thursday and lingering into Friday for some basins. Forecasters emphasize that the second surge will likely produce the highest crests on many rivers because antecedent conditions are wet.
Concrete, on the Skagit River, is among the communities most at risk; local officials reported the Skagit could crest roughly 15 feet above the major‑flood threshold and exceed the old record by several feet. Mount Vernon’s gauge is also expected to surpass major flood stage and crest at levels far above prior seasonal norms. County and state teams are staging sandbags and are ready to support local evacuations if ordered.
Elsewhere, the Snoqualmie River already reached major flood levels at Snoqualmie Falls, with a forecasted secondary peak Wednesday night. The White and Green rivers will see elevated flows as Corps dam releases increase to protect upstream facilities, intentionally routing water downstream to maintain reservoir safety. Transportation disruptions continue: Interstate exits, local highways and bridges have been closed or restricted after water overtopped roadways or agencies detected possible structural stress.
Analysis & Implications
The second, stronger surge matters because saturated soils and already‑high river levels greatly reduce the landscape’s ability to absorb additional rain, so a given inch of precipitation produces a larger runoff response than it would under drier conditions. That amplifies peak river stages and increases the chance that levees, roadways and low‑lying infrastructure will be overtopped or undermined. Economically, cascading disruptions—closed freight routes, delayed transit, localized power outages and damage to homes or businesses—could cost millions in immediate response and recovery.
Reservoir operations are central to outcomes. The U.S. Army Corps’ decision to raise releases from Mud Mountain and Howard Hanson dams is intended to protect upstream communities and dam infrastructure, but that choice knowingly increases downstream flows for multiple days. Residents and local officials must weigh the tradeoff between reservoir safety and short‑term river impacts; clear communication about timing and expected stages will be key to reducing surprise and enabling orderly evacuations where necessary.
On the emergency‑management side, Level 1 activation of the State Emergency Operations Center signals that state agencies anticipate multi‑jurisdictional resource needs (shelters, sandbags, National Guard aid). That posture accelerates resource deployment but does not, by itself, mandate evacuations; those remain local decisions. For insurers and utilities, prolonged high flows raise the likelihood of claims for flood and landslide damage and of distribution outages where lines are flooded or trees fall.
Comparison & Data
| Location | Recent/Forecast Crest | Context |
|---|---|---|
| Skagit River (Concrete) | ~15 ft above major flood stage; >5 ft above prior record | Major flood expected Wed afternoon; peak ~4 a.m. Thu |
| Skagit River (Mount Vernon) | ~9 ft above major flood stage | Major flooding expected late Wed into Thu/ Fri crest |
| Snoqualmie Falls | 17.8 ft (Tue); forecast ~18.6 ft (Wed night) | Highest in a decade; record comparable events in 2015, 1990, 2009 |
| Olympia Airport (rain, Mon) | 3.03 in (daily record) | Broken 2015 daily record |
These gauges and rain totals show how the first pulse elevated baselines before the incoming second surge. In many basins, forecast crests exceed thresholds that trigger major‑flood responses, and in several cases projections exceed historical records by multiple feet—an indicator of potentially severe damage across floodplains.
Reactions & Quotes
Local officials and emergency managers urged vigilance and preparation as river forecasts deteriorated.
“We’re just watching the river.”
Marla Reed, Mayor of Concrete (brief phone interview)
Mayor Reed described crews monitoring dams and river gauges closely and confirmed sandbag availability; she stressed residents should follow local directions as conditions change.
“Our state emergency management personnel remain ready to support our local communities if they request help, and the Washington National Guard has resources ready if necessary.”
Gov. Bob Ferguson (social media post, Dec. 10, 2025)
The governor announced a Level 1 activation of the State Emergency Operations Center to coordinate a statewide response and resource staging for counties requesting assistance.
“This is a lot of water that can come down, but the current forecast is correct, and so people should… follow any direction from their local officials.”
Matthew Cullen, National Weather Service meteorologist
Cullen emphasized that forecasts project significant crests and that residents in low‑lying areas should plan for potential evacuations and disruptions.
Unconfirmed
- Reports that any of the stressed dams (e.g., near Lake Sylvia in Grays Harbor County) have failed are unconfirmed; officials say the structure is showing increasing stress but has not failed.
- Some social media claims about widespread bridge collapses or community evacuations beyond those publicly announced lack official confirmation at this time.
- Specific estimates of insured loss totals and long‑term infrastructure damage remain unknown until assessments after waters recede.
Bottom Line
The region faces a multi‑day flood threat driven by a second, stronger atmospheric river arriving after saturated conditions were already established by the first pulse. Forecasts show record or near‑record crests on key rivers—most notably the Skagit and Snoqualmie systems—meaning that communities in floodplains should prepare for serious inundation, roadway closures and potential evacuations.
Residents should follow official instructions, avoid driving into floodwater, and prepare for utility disruptions and debris hazards. Emergency managers have activated resources and opened shelters where needed; continued monitoring of official channels (county alerts, the National Weather Service and local emergency operations centers) is the best way to stay informed as forecasts and operations evolve.
Sources
- The Seattle Times (regional news reporting)
- National Weather Service (federal weather forecasts and river gauge data)
- Governor Bob Ferguson post (official state social media announcement)
- Skagit County flood information (local government flood updates)
- U.S. Army Corps of Engineers (official reservoir and dam operations)