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AVWSEW The following message is transmitted at the request of the Northwest Avalanche Center. ...The Northwest Avalanche Center in Seattle has issued an Avalanche Warning... * WHAT...High avalanche danger is forecast Wednesday night and Thursday. * WHERE...Stevens and Snoqualmie Passes, the west slopes of the Washington Cascades, and Mt Hood. * WHEN...In effect from 18:00 PST Wed Dec 25th through 18:00 PST Thu Dec 26th. * IMPACTS...Heavy snow, strong winds, and a low-elevation transition from snow to rain will lead to very dangerous avalanche conditions through Thursday. High avalanche danger creates risk at all elevations. * PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche conditions exist over the next 24 hours. Travel in avalanche terrain is not recommended. Consult https://www.nwac.us/ or www.avalanche.org for more detailed information. Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.

* WHAT...Southwest winds 35 to 50 mph with gusts up to 65 mph expected. * WHERE...This includes the Summer Lake area and Highway 31, the mountains across Lake County and eastern Klamath County, and Modoc County. * WHEN...From 10 PM this evening to 10 AM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

* WHAT...South winds 40 to 55 mph with gusts up to 70 mph expected. * WHERE...Curry County Coast and South Central Oregon Coast, including all beaches, capes and headlands from Reedsport to Brookings, and exposed portions of Highway 101. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

* WHAT...South winds 25 to 35 mph with gusts up to 65 mph. * WHERE...This includes higher terrain in eastern Curry and southern and southwestern Josephine counties. In Jackson County this includes the southern Rogue Valley from southern portions of Medford southward, including Phoenix, Talent and Ashland. * WHEN...Until 4 AM PST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Winds will be strongest over the coastal mountains in eastern Curry and Josephine Counties. Winds will be strongest south of Medford late this evening and tonight.

* WHAT...Heavy snow at or above elevations greater than 3500 ft. Additional snow accumulations between 10 and 30 inches. Winds gusting as high as 50 mph. * WHERE...West Slopes North Cascades and Passes, West Slopes North Central Cascades and Passes, and West Slopes South Central Cascades and Passes. * WHEN...Until 10 PM PST Thursday. * IMPACTS...Travel could be very difficult to impossible. Strong winds could cause extensive damage to trees and power lines. * ADDITIONAL DETAILS...Additional snow accumulations of 6 to 14 inches will be possible for elevations between 3000 to 3500 feet, including Snoqualmie Pass.

* WHAT...Heavy snow at or above elevations greater than 4000 ft. Additional snow accumulations between 5 and 15 inches. Winds gusting as high as 45 mph. * WHERE...Olympics. * WHEN...Until 4 PM PST Thursday. * IMPACTS...Travel could be very difficult to impossible. Very strong winds could cause extensive damage to trees and power lines.

ESFSEW An atmospheric river will bring significant rainfall to the Olympic Mountains this evening into Thursday. Widespread rainfall totals of 3 to 5 inches are expected, with locally over 6 inches on the the highest peaks. Snow levels will increase from around 3,500 feet up to as high as 4,500 feet tonight before lowering once again Thursday. While precipitation will be much less with the systems beginning Friday the lack of much of a break will keep rivers over the Southwest Interior rising into the weekend. It is possible the lower reaches of the Chehalis could flood late Friday into Saturday. The Skookumchuck near Bucoda, Newaukum near Chehalis and the Satsop near Satsop could reach action stage Friday. Please monitor the latest river forecasts from the National Weather Service for additional information.

An atmospheric river into Thursday is expected to produce heavy rainfall across parts of the region. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest Washington, including the following county, Clallam. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Rainfall accumulations of 3 to 5 inches over the Olympics expected. Expect rises on rivers and streams due to the heavy precipitation, and the Bogachiel River may rise above flood stage Thursday. - http://www.weather.gov/safety/flood

...The Flood Warning continues for the following rivers in Washington... Skokomish River At Potlatch affecting Mason County. .The river will remain near flood stage today then rise tonight into Thursday cresting in moderate flood stage Thursday morning. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Skokomish River at Potlatch. * WHEN...Until further notice. * IMPACTS...At 17.5 feet, the Skokomish River will cause moderate flooding, with deep and quick flood waters inundating some residential areas, many roads, and much of the farm land in the Skokomish Valley. Inundated roads include the Skokomish Valley road, Bourgault Road West, Purdy Cutoff Road, and Highway 106. * ADDITIONAL DETAILS... - At 3:30 PM PST Wednesday the stage was 16.5 feet. - Flood stage is 16.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:30 PM PST Wednesday was 16.5 feet. - Forecast...The river is expected to rise above flood stage late this afternoon and continue rising to 17.6 feet late tomorrow morning. Additional rises are possible thereafter. - Flood History...This crest compares to a previous crest of 17.6 feet on 10/20/2003. - http://www.weather.gov/safety/flood

* WHAT...Heavy snow expected. Total snow accumulations between 12 and 24 inches. Winds gusting as high as 45 mph. * WHERE...Stehekin, Stevens Pass, and Holden Village. * WHEN...Until 10 PM PST Thursday. * IMPACTS...Travel could be very difficult leading up to and over Stevens Pass. Heavy wet snow falling at one inch per hour or more at times could lead to isolated tree damage and power outages. Areas of blowing snow could significantly reduce visibility. * ADDITIONAL DETAILS...Lighter snow amounts will be possible at Stehekin due to marginal temperatures near or above freezing.

* WHAT...Snow expected. Total snow accumulations between 2 and 6 inches in the valleys and 5 to 8 inches in the mountains. * WHERE...Tiger, Springdale-Hunters Road, Colville, Fruitland, Orin-Rice Road, Kettle Falls, Chewelah, Metaline Falls, Newport, Northport, Ione, Deer Park, Flowery Trail Road, and Metaline. * WHEN...Until 1 PM PST Thursday. * IMPACTS...Lowest confidence in snow amounts is along the Columbia and Pend Oreille Rivers where warmer temperatures could limit accumulations. * ADDITIONAL DETAILS...Lowest confidence in snow amounts is along the Columbia and Pend Oreille Rivers where warmer temperatures could limit accumulations.

* WHAT...Heavy snow expected. Total snow accumulations between 9 and 16 inches. * WHERE...Leavenworth and Plain. * WHEN...Until 1 PM PST Thursday. * IMPACTS...Travel could be very difficult. Heavy wet snow falling at one inch per hour or more at times could lead to isolated tree damage and power outages. * ADDITIONAL DETAILS...The heaviest snow is expected to fall between 10PM and 4AM Thursday.

* WHAT...Heavy snow expected. Total snow accumulations between 8 and 15 inches. Winds gusting as high as 35 mph. * WHERE...Mazama, Loup Loup Pass, Twisp, Winthrop, Methow, and Conconully. * WHEN...Until 1 PM PST Thursday. * IMPACTS...Travel could be very difficult. Heavy wet snow falling at one inch per hour or more at times could lead to isolated tree damage and power outages.

* WHAT...Heavy snow expected. Total snow accumulations between 4 and 10 inches. * WHERE...Boulder Creek Road, Sherman Pass, Republic, Wauconda, Chesaw Road, Inchelium, and Highway 20 Wauconda Summit. * WHEN...Until 1 PM PST Thursday. * IMPACTS...Travel could be very difficult. Heavy wet snow falling at one inch per hour or more at times could lead to isolated tree damage and power outages.

* WHAT...Heavy snow expected. Total snow accumulations between 2 and 6 inches below 2500 feet and 6 to 10 inches on higher benches above 2500 feet. * WHERE...Omak, Tonasket, Oroville, Okanogan, Bridgeport, Brewster, Waterville, Badger Mountain Road, Nespelem, Disautel Pass, and Mansfield. * WHEN...Until 7 AM PST Thursday. * IMPACTS...Travel could be very difficult. Snowfall rates of one inch per hour are expected at times Christmas night into early Thursday morning. * ADDITIONAL DETAILS...Lowest confidence in snow amounts is along the Columbia and Okanogan Rivers where warmer temperatures could limit accumulations.

* WHAT...Snow expected for the Highway 2 Corridor Across the Upper Columbia Basin. Total snow accumulations between 2 and 5 inches. Winds gusting as high as 35 mph. * WHERE...Grand Coulee, Wilbur, Creston, and Coulee City. * WHEN...Until 7 AM PST Thursday. * IMPACTS...Plan on slippery road conditions.

* WHAT...Heavy snow. Snow accumulations between 4 and 8 inches. * WHERE...Number 2 Canyon, Entiat, Cashmere, Number 1 Canyon, Wenatchee, Chelan, and Pangborn Airport. * WHEN...Until 7 AM PST Thursday. * IMPACTS...Travel could be very difficult. Snowfall rates of one inch per hour are expected at times Christmas night into early Thursday morning. * ADDITIONAL DETAILS...Total snow accumulations between 1 and 4 inches at lower elevations near the Columbia River.

* WHAT...For the Coastal Flood Warning, significant coastal flooding expected. Inundation of between 2 and 2.5 feet above ground level is possible along shorelines and low-lying coastal areas. For the High Surf Advisory, large breaking waves of 18 to 23 feet in the surf zone. * WHERE...Central Coast zone. * WHEN...For the Coastal Flood Warning, from 5 AM to 2 PM PST Thursday. For the High Surf Advisory, until 10 AM PST Friday. * IMPACTS...Significant coastal flooding due to high tides and storm surge is expected. This could lead to road closures. Low lying property including homes, businesses, and some critical infrastructure may be inundated. Shoreline erosion or damage may occur. For the high surf advisory, large waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties, and drown while observing high surf. * ADDITIONAL DETAILS...The combination of very large waves, a large high tide occuring around 9 AM, and low pressure will yield the potential for significant coastal flooding and may maintain some overflow longer than normal after the peak of the high tide.

* WHAT...For the Coastal Flood Advisory, minor coastal flooding expected. Inundation of around 2.5 to 2.75 feet above ground level is possible along shorelines and low-lying coastal areas. For the High Surf Advisory, large breaking waves of 18 to 23 feet in the surf zone. * WHERE...North Coast zone. * WHEN...For the Coastal Flood Advisory, from 5 AM to 2 PM PST Thursday. For the High Surf Advisory, until 10 AM PST Friday. * IMPACTS...Significant coastal flooding due to high tides and storm surge is expected. This could lead to road closures. Low lying property including homes, businesses, and some critical infrastructure may be inundated. Shoreline erosion or damage may occur. For the high surf advisory, large waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties, and drown while observing high surf. * ADDITIONAL DETAILS...The combination of very large waves, a large high tide occuring around 9 AM, and low pressure will yield the potential for significant coastal flooding and may maintain some overflow longer than normal after the peak of the high tide.

* WHAT...For the Coastal Flood Advisory, minor coastal flooding expected. Inundation of around 2.5 to 2.75 feet above ground level is possible along shorelines and low-lying coastal areas. For the High Surf Advisory, large breaking waves of 18 to 23 feet in the surf zone. * WHERE...North Coast zone. * WHEN...For the Coastal Flood Advisory, from 5 AM to 2 PM PST Thursday. For the High Surf Advisory, until 10 AM PST Friday. * IMPACTS...Significant coastal flooding due to high tides and storm surge is expected. This could lead to road closures. Low lying property including homes, businesses, and some critical infrastructure may be inundated. Shoreline erosion or damage may occur. For the high surf advisory, large waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties, and drown while observing high surf. * ADDITIONAL DETAILS...The combination of very large waves, a large high tide occuring around 9 AM, and low pressure will yield the potential for significant coastal flooding and may maintain some overflow longer than normal after the peak of the high tide.