Major flooding expected for Snohomish River communities has placed thousands of western Washington residents on urgent alert this weekend, as a powerful atmospheric river continues to saturate the region and drive water levels to dangerous heights not seen since December’s historic disaster.
Stay informed and stay safe — scroll down for everything you need to know about what is happening right now and how it could affect your home, your commute, and your community.
What Is Driving the Flooding
An atmospheric river has been parked over the Pacific Northwest for days, delivering prolonged, steady rainfall across the region. On its own, the rainfall would have been manageable. But the timing made things far worse. Just days before the storm arrived, significant snowfall blanketed the Cascade Mountains. When rain began falling directly onto that heavy snowpack, the rapid melt sent enormous volumes of water rushing into rivers all across western Washington simultaneously.
The result is a dangerous and fast-moving situation that forecasters have been tracking closely throughout the week. River levels climbed steadily from Wednesday onward, and by Friday morning, the situation had escalated dramatically across multiple waterways in Snohomish, King, and Skagit counties.
The Snohomish River Reaches Major Flood Stage
The Snohomish River is the center of the most serious concern this weekend. Near Monroe, the river climbed to flood stage in the early hours of Thursday morning, reaching 15 feet at approximately 2:15 a.m. and pushing water into low-lying pastureland and rural roads almost immediately.
By Friday evening, conditions had grown significantly worse. The river surged to 29.2 feet near the city of Snohomish, well above the 25-foot flood stage threshold. A Flood Warning has been extended through Sunday afternoon, with major flooding both occurring and forecast to continue throughout the weekend. At 29 feet, the river triggers Phase 3 of Snohomish County’s flood warning program — a designation that signals serious, widespread impact across the valley.
Near Monroe, the river was forecast to crest at approximately 18.3 feet Friday night, with major flood stage in that area defined at 17 feet and above. The Snohomish Riverfront Trail was closed Friday afternoon as water levels made it impassable.
Roads, Farmland, and Neighborhoods Under Water
The flooding is not staying inside the riverbanks. Low-lying farmland throughout the Snohomish Valley has taken on water, and several key roads are either flooded or at serious risk. Riverview Road and the Snohomish-Monroe Highway are among those affected when the river reaches 29 feet. Old Snohomish Monroe Road has also been impacted during the earlier stages of the event.
Residential areas near Monroe are not out of danger either. Low-lying properties outside the protection of levees are vulnerable, and conditions can change with very little warning as upstream tributaries continue to drain into an already swollen river system.
Emergency crews and public works teams have been out throughout the week, monitoring gauges, checking road conditions, and responding to calls across the flooded valley.
A Rescue Already Happened — and It Was Preventable
On Thursday, Snohomish fire crews responded to a rescue after a driver went around closed road signs and drove directly into floodwaters. The driver survived without injury, but the incident underscored a warning that emergency officials have been repeating all week: never attempt to drive through a flooded road, no matter how shallow it looks.
Just six inches of fast-moving water is enough to knock an adult off their feet. One foot of moving water can sweep a car away entirely. The most common cause of flood-related deaths in the United States is driving into floodwaters, and road barriers exist specifically to prevent those tragedies. Residents are urged to treat every closed road as if their life depends on it — because it very well might.
Landslides Adding to the Danger
The flooding is only part of the picture. The same rain event has destabilized hillsides and mountain terrain throughout western Washington. Several landslides have already occurred, with the most disruptive blocking all northbound lanes of Interstate 5 near Bellingham. State transportation crews worked to clear the highway, but the closures created chaos on one of the region’s most critical travel corridors.
In the Cascades, avalanche danger has also spiked. The Northwest Avalanche Center issued warnings for areas including Mountain Loop Highway and mountains south of Highway 2 on the western side of the range. Anyone planning to travel into the mountains this weekend faces significant risk and should check current conditions before heading out.
When Will the Water Begin to Drop
There is some relief in sight. Rain is expected to taper across the lowlands later this weekend as a colder air mass moves in behind the atmospheric river. Snow levels will drop to between 3,000 and 3,500 feet, shifting precipitation in the Cascades back to snow rather than rain. That change in pattern should help reduce the runoff that has been hammering rivers throughout the week.
Most rivers affected by this event are expected to begin receding Saturday, though the Skagit River at Mount Vernon is an exception and is expected to crest Saturday afternoon. For the Snohomish River at Snohomish, the flood warning remains in effect through Sunday afternoon, and river levels are expected to remain elevated well into the weekend before any meaningful drop.
A Community Still Healing From December
This flooding event is hitting Snohomish County at a particularly difficult moment. In December 2025, a historic string of atmospheric rivers triggered record flooding throughout the county, forcing hundreds of people from their homes and claiming the life of a person who drove into floodwaters. Recovery from that event is still ongoing.
County emergency management is tracking conditions closely while acknowledging that resources are still being deployed for December recovery efforts. Residents and businesses that suffered damage from December’s flooding and have not yet received assistance are still able to access support through in-person meetings at the Snohomish Library and Sultan City Hall.
What Residents Should Do Right Now
If you live near the Snohomish River or any other affected waterway, now is the time to act — not wait. Move vehicles and valuables to higher ground. Check your property for drainage issues. Stay updated through Snohomish County’s emergency alert system and sign up for notifications if you have not already done so.
Avoid any road that has water on it, regardless of how passable it appears. Report dangerous conditions or visible landslide warning signs like cracked roads immediately by calling 911. And keep a close eye on conditions through the night Saturday, as some rivers will not reach their peak until Saturday afternoon.
The combination of snowmelt, heavy rainfall, and saturated ground has created one of the more serious flood events western Washington has seen this year. Staying informed and making smart decisions in the next 48 hours could make all the difference.
If you are in the Snohomish Valley or watching conditions from nearby, drop a comment below and tell us what you are seeing on the ground — your real-time updates could help your neighbors stay safe this weekend.