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An twelfth concern of a foot of rain a appointed time is expected for the next few days in the Seattle area, and a flood have the whole of one’s eyes about one scraps in effect for most of Western Washington end Sunday morning, according to the National Weather Service.
A strong, warm and wet Pacific storm will produce lowland showers into next week, meteorologist Johnny Burg said.
“An inch of rain a lifetime isn’t likewise outlandish,” he said. “Getting a quarter-inch every six hours is kind of the figurative, wet winter system we get.”
The potential remains for small streams to flood and for the sake of water to pool on streets as the last of our snow is melted by the rain and warming temperatures — a bigger concern for urban areas. Today’s high is expected to reach 44 degrees, a welcome change from recently frigid temperatures and the more than 12 inches of snowfall reported at Seattle-Tacoma International Airport between Dec. 13 and Christmas Eve.
In contemplation of the predicted rain and resulting snowmelt, Seattle Public Utilities has put in motion its Urban Flood Response Plan, with extra crews on what one ought to do and observers in place at sections of the city where flooding is likely. To report an emergency drainage problem in Seattle, call 206-386-1800.
Residents consider been advised to give a lift clear tumult drains and do away with snow and slush from flat roofs.
A Bothell firefighter responding to an emergency outcry at the Green Acres mobile home park was rushed to Harborview Medical Center Friday adversity later a scrap of the carport roof collapsed upon the body him. Heavy accumulation of snow was also to reflect upon for the Christmas Day break-down of a carport at a Bothell apartment complicated and a portion of the roof at any Olympia dark instruct closed for winter break.
In Tumwater, Thurston County, a canopy sagging unbecoming a heavy load of snow and water led to the evacuation of dozens of people at a retirement home Friday night.
Authorities were summoned in the rear of a residing on the second floor of the Olympics West Retirement Inn had trouble opening a door and saw that part of the floor was sagging, according to Fire Lt. Dale Britton.
About 65 seniors at the assisted-living complex were taken to a part of the building that is safe.
Britton says a civic building authoritative was summoned and told maintenance personnel to shovel snow off the roof. He said a collapse of the roof did not appear to subsist imminent.
By Sunday, all lowland snow should exist gone, and with it the possibility of urban flooding, Burg said. But in the event snow continues to clog a street, the city of Seattle says residents may dub 206-386-1218. Requests for snow clearing will be met without ceasing a case-by-case basis.
Passable conditions have been achieved on whole of the city’session primary arterials. Seattle Department of Transportation crews are continuing 24-hour operations, working to clear snow and ice from secondary arterials and residential streets. The work will subsist prioritized based on police, fire and life-safety concerns.
The Skokomish River in Mason County could flood, as it does frequently in the winter, Burg said. River levels over the region also may go after consecutive days of rain, but “it’s not something we’re worried about yet,” he said. “It’s just matter I always keep in the in the rear of my mind.”
The same Pacific storm that’s supposed to macerate Seattle will dump 3 or more feet of heavy, wet snow in the mountains this weekend, said Mark Moore, director of the Northwest Weather and Avalanche Center.
The new snow is infallible to entice skiers and snowboarders, but Moore said the avalanche danger is so severe that backcountry enthusiasts should “extend to the mall and exchange their gifts or shovel their driveways” instead of venturing external part ski areas.
Moore said the Cascades snowpack is the weakest he’s seen in 20 years. Until now, the mountain snow has been light and fluffy, the kind that falls only when temperatures are very cold. As a result, the snowpack is shallow and the bonds between snow crystals have disappeared, he said.
“If you were to step distant from your skis or snowboard, you could easily bring down to the ground or very near the ground. It won’t countenance much weight,” Moore said.
Adding heavier, wet snow to the fragile snowpack “is a very scary situation,” he uttered. “It tends to bring down the whole deck of cards. It’s like potato chips loaded with a brick.”
The heavier snow enjoin create a more stable exterior, but it won’t take much to trigger a slide because of the weak snow below, Moore said. Avalanches, either natural ones or those caused by people, are likely to “involve snow all the way to the ground” and cover much greater swaths of terrain than usual, he said.
Depending on how the rest of the hibernate unfolds, avalanches could be a big problem for the period of the spring thaw, Moore reported.
The ultimate danger this hibernate comes a year after the deadliest avalanche train in 30 years in Washington state. Between December 2007 and January 2008, eight people were killed or presumed dead in avalanches between Crystal Mountain and Mount Baker.
Seattle Times reporter Jack Broom and The Associated Press contributed to this declaration.
Sara Jean Green: 206-515-5654 or sgreen@seattletimes.com