Deluge in Marysville a ‘100-year event’

MARYSVILLE — The unseasonable rainstorm that struck the Marysville area late Sunday was “a 100-­year event,” a city official said. The sudden downpour backed up storm drains, flooding streets, and water rose to two feet deep in some areas.

According to the Marysville Public Works Department, the city received 2.61 inches of rain in the first 65 minutes. At its peak, the storm cell produced rainfall of 2.48 inches per hour. The total from the storm was 3.40 inches.

Public Works Director Kevin Nielsen called the storm “extremely unique.” The rainfall in those two hours was equivalent to a so-called 100-­year event, which is defined by the amount of rain that falls in 24 hours, Nielsen said. A 100-­year event has an estimated 1 percent chance of happening in a given year, or is expected to occur once every 100 years.

A 100-­year rain event for Marysville, as calculated by the state Department of Ecology, would be 3.36 inches — in 24 hours.

The National Weather Service agrees that the Marysville deluge was particularly unique in Western Washington.

“Very few rainfalls during this time of year are above an inch,” said meteorologist Johnny Burg of weather service’s Seattle office. “Usually rainfalls in May are between one-quarter to three-quarters of an inch.”

The storm sewers in Marysville are designed to accommodate a 25­-year, 24-­hour event, which the state estimates would be 2.75 inches of rain in 24 hours.

Evidence suggests that the trend in Western Washington is for more high-­intensity, shorter-duration rains in spring and fall in recent years, Nielsen said.

Talk to us

More in Local News

King County map logo
Tribal members dance to start an assemble on the National Day for Truth and Reconciliation and Orange Shirt Day Friday evening at Tulalip Gathering Hall in Tulalip, Washington on September 30, 2022.  (Kevin Clark / The Herald)
‘Still here’: Tulalip boarding school descendants celebrate resilience

On Orange Shirt Day, a national day of remembrance, the Tulalip Tribes honored those who suffered due to violent cultural suppression.

Councilmember Megan Dunn, left, stands next to County Executive Dave Somers as he presents his 2023 budget proposal to her, Councilmember Nate Nehring and Councilmember Sam Low. (Snohomish County)
As County Council begins budget talks, here’s how you can weigh in.

Department heads will make their pitches in the next few days. Residents will get a say at a forum and two hearings this month

Representative Rick Larsen speaks at the March For Our Lives rally on Saturday, June 11, 2022 in Everett, Washington. (Olivia Vanni / The Herald)
Larsen to hold community meeting in Everett on Monday

The veteran Democratic lawmaker will address recent legislation passed by Congress and other topics.

Everett
Everett gets state Auditor’s Office stewardship award

State Auditor Pat McCarthy presented the award during the most recent Everett City Council meeting.

Food forum
Cookie bars fit for hungry fishermen

Laurie Olsen makes these decadent bars for her fisherman husband and crew aboard the St. John II.

Dan Stucki grabs a free coffee from Espresso Chalet before heading out on his first day to assess the Bolt Creek Fire on Tuesday, Sept. 27, 2022. Stucki served as a division supervisor and traveled from Utah to help contain the fire. He's been a firefighter for 21 years. (Taylor Goebel / The Herald)
Gold Bar coffee shop fuels hundreds of firefighters amid Bolt Creek blaze

The massive blaze threatened Espresso Chalet. That didn’t stop owners Mark and Sandy Klein from giving firefighters free cups of coffee.

NO CAPTION. Logo to accompany news of Washington state.
$500M-plus from opioid deal starts heading to Washington

The first settlement payments will begin reaching Washington communities in December.

Former television food personality Graham Kerr meets with residents of Windsor Square Senior Living before giving a presentation on Thursday, Sep. 15, 2022, in Marysville, Washington. (Ryan Berry / The Herald)
At 88, TV chef ‘Galloping Gourmet’ still sizzles with the ladies

Graham Kerr, the granddad of cooking entertainment shows in the 1960s, calls Snohomish County home.

Most Read