Rain, wind, snow won't let go of Pacific Northwest

(CNN) -- A vicious mix of wind, rain and snow that has deluged the Pacific Northwest since Tuesday isn't letting up, 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 more than 15 inches of rain and other getting socked with between 1 and 3 feet of snow.

The weather service 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 threats won't necessarily go away once this wave of rain abates. Many rivers and creeks already are at, near or above flood stage, a situation that the added precipitation forecast through Sunday and perhaps beyond won't help.