A vicious mix of wind, rain and snow that has deluged the Pacific Northwest since Tuesday isn't letting up, and it's spurring the National Weather Service to issue an array of cautionary guidance.
(CNN) -- A vicious mix of wind, rain and snow that has deluged the Pacific Northwest since Tuesday isn't letting up, and it's spurring the National Weather Service to issue an array of cautionary guidance.
Forecasters from the National Weather Service's Hydrometeorological Prediction Center expect that moderate to heavy precipitation will pummel the region through at least Sunday, with some areas getting 10 to 12 inches of rainfall, others accumulating one to three feet of snow, and strong winds will whip the precipitation around.
In addition, the government has issued a hazardous seas warning for coastal areas in Oregon and northern California.
Portions of coastal Washington, Oregon and California all face some sort of flood watch, warning, or advisory. The National Weather Service's Hydrometeorological Prediction Center says from 4 p.m. Tuesday through 4 a.m. Friday, dozens of places across the region received more than an inch of rain, with St. Helena, California, with 8.82 inches, atop that list.
The Truckee River in the Sierra Nevada was causing concern, according to chief meteorologist Mark Finan, at CNN affiliate KCRA in Sacramento, California. Water levels in the river were up to 2.66 feet and rising Friday morning. KCRA forecasts that the Truckee will reach major flood stage by Sunday morning.
High wind watches warnings, or advisories are in effect for portions of Oregon, California, Nevada and Montana. Powerful gusts have been blowing through large swaths of northern California and Nevada, with top wind speeds around 80 mph in each state, according to the weather service.
And parts of California, Idaho, Montana and Wyoming are dealing with winter storm watches and warnings. Some parts of California already had as many as eight inches of snow by 4 a.m. Friday, while some Oregon locations had accumulated 10 inches.