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.

More in Local News

Everett district relents on eminent domain moving expenses

Homeowners near Bothell still must be out by April to make way for a planned new high school.

Their grown children died, but state law won’t let them sue

Families are seeking a change in the state’s limiting wrongful-death law.

Officials rule train-pedestrian death an accident

The 37-year-old man was trying to move off the tracks when the train hit him, police say.

Ex-Monroe cop re-arrested after losing sex crime case appeal

He was sentenced to 14 months in prison but was free while trying to get his conviction overturned.

Marysville hit-and-run leaves man with broken bones

The state patrol has asked for help solving an increasing number of hit-and-run cases in the state.

Everett man killed at bar had criminal history, gang ties

A bar employee reportedly shot Matalepuna Malu, 29, whose street name was “June Bug.”

There’s plenty to cheer in overdue capital budget

In Snohomish County, there’s money for a number of projects.

Parking a constant problem at Wallace Falls State Park

There’s a study under way on how to tackle that issue and others.

Front Porch

EVENTS Autoharpist in Everett Folksinger, storyteller and autoharp virtuoso Adam Miller returns… Continue reading

Most Read