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...MIXED WINTRY PRECIPITATION LATE THIS AFTERNOON AND TONIGHT... ...MODERATE TO HEAVY SNOW TONIGHT THROUGH SUNDAY MORNING IN THE NORTHERN BLUE MOUNTAINS... .A moist warm front will arrive to the Washington and Oregon Cascades this afternoon and will spread east of the Cascades tonight. Precipitation will primarily fall as snow, but there will also be areas of light freezing rain. The northern Blue Mountains above 4500 feet will also observe moderate to heavy snow with this front. * WHAT...Snow expected for elevations above 4500 feet. Total snow accumulations 7 to 10 inches. Winds gusting as high as 35 mph will cause blowing and drifting of snow. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...From 8 PM this evening to 7 AM PST Sunday. * IMPACTS...Travel could be difficult due to periods of moderate to heavy snow.

...MIXED WINTRY PRECIPITATION LATE THIS AFTERNOON AND TONIGHT... ...MODERATE TO HEAVY SNOW TONIGHT THROUGH SUNDAY MORNING IN THE NORTHERN BLUE MOUNTAINS... .A moist warm front will arrive to the Washington and Oregon Cascades this afternoon and will spread east of the Cascades tonight. Precipitation will primarily fall as snow, but there will also be areas of light freezing rain. The northern Blue Mountains above 4500 feet will also observe moderate to heavy snow with this front. * WHAT...Mixed precipitation expected. Total snow accumulations up to one inch and ice accumulations around a light glaze. * WHERE...In Oregon, Foothills of the Southern Blue Mountains of Oregon and North Central Oregon. In Washington, Kittitas Valley, Simcoe Highlands, and Yakima Valley. * WHEN...From 4 PM this afternoon to 10 AM PST Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute.

...MIXED WINTRY PRECIPITATION LATE THIS AFTERNOON AND TONIGHT... ...MODERATE TO HEAVY SNOW TONIGHT THROUGH SUNDAY MORNING IN THE NORTHERN BLUE MOUNTAINS... .A moist warm front will arrive to the Washington and Oregon Cascades this afternoon and will spread east of the Cascades tonight. Precipitation will primarily fall as snow, but there will also be areas of light freezing rain. The northern Blue Mountains above 4500 feet will also observe moderate to heavy snow with this front. * WHAT...Mixed precipitation expected. Total snow accumulations up to 4 inches and ice accumulations around a light glaze. * WHERE...East Slopes of the Oregon Cascades. * WHEN...From 4 PM this afternoon to 10 AM PST Saturday. * IMPACTS...Plan on slippery road conditions.

* WHAT...South winds 25 to 35 mph with gusts 50 to 55 mph expected for the base of the northern Blue Mountains of Oregon. * WHERE...Foothills of the Northern Blue Mountains of Oregon. * WHEN...From 4 PM this afternoon to 10 AM PST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...South winds 25 to 35 mph with gusts up to 50 mph expected for Ladd and Pyles Canyons. * WHERE...Grande Ronde Valley. * WHEN...From 4 PM this afternoon to 10 AM PST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...Significant coastal flooding possible. Inundation of 2 to 3 feet above ground level is likely along shorelines and low-lying coastal areas. Large waves of 17 to 19 feet are expected along the coast. * WHERE...North Coast zone. * WHEN...From Saturday morning through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. * ADDITIONAL DETAILS...Highest impacts will occur around the 11 AM high tide on Saturday. Forecast confidence is currently moderate in 2 to 3 feet of inundation. However, there is a 10 percent chance of water levels up to 3.5 feet above ground level. In addition to the expected flooding on Saturday, flooding may continue through Monday during the late morning to mid-day high tides.

* WHAT...For the Coastal Flood Advisory, minor coastal flooding with inundation of around 2 feet above ground level is expected. For the Coastal Flood Watch, significant coastal flooding possible. Inundation of 2 to 3 feet above ground level is likely along shorelines and low-lying coastal areas. Large waves of 17 to 19 feet are expected along the coast. * WHERE...Central Coast zone. * WHEN...For the Coastal Flood Advisory, from 7 AM to 1 PM PST Friday. For the Coastal Flood Watch, from Saturday morning through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. * ADDITIONAL DETAILS...Highest impacts will occur around the late morning high tide on Friday and Saturday. Additional flooding may continue through Monday during the late morning to mid-day high tides.

* WHAT...For the Coastal Flood Advisory, minor coastal flooding with inundation of around 2 feet above ground level is expected. For the Coastal Flood Watch, significant coastal flooding possible. Inundation of 2 to 3 feet above ground level is likely along shorelines and low-lying coastal areas. Large waves of 17 to 19 feet are expected along the coast. * WHERE...Central Coast zone. * WHEN...For the Coastal Flood Advisory, from 7 AM to 1 PM PST Friday. For the Coastal Flood Watch, from Saturday morning through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. * ADDITIONAL DETAILS...Highest impacts will occur around the late morning high tide on Friday and Saturday. Additional flooding may continue through Monday during the late morning to mid-day high tides.

...FREEZING RAIN ACCUMULATIONS AROUND ONE TENTH OF AN INCH IN THE UPPER HOOD RIVER VALLEY TODAY... * WHAT...Freezing rain expected. Total ice accumulations around one tenth of an inch. * WHERE...Upper Hood River Valley. * WHEN...From 10 AM this morning to 2 AM PST Saturday. * IMPACTS...Difficult travel conditions are possible. The hazardous conditions could impact the Friday evening commute. * ADDITIONAL DETAILS...Precipitation will start off falling as snow before transitioning to freezing rain. There is around a 10% chance of two tenths of an inch of ice near Parkdale and higher elevations near Blowdown Ridge.

* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...Until 2 PM MST this afternoon. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...Light snow with additional accumulations up to one inch. * WHERE...North Central Oregon. * WHEN...Until 2 AM PST Friday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Even light snowfall amounts can accumulate on roads and cause dangerous driving conditions due to slippery and snow-covered roads.

* WHAT...Light snow with additional accumulations up to one inch. * WHERE...Foothills of the Blue Mountains of Oregon. * WHEN...Until 2 AM PST Friday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Even light snowfall amounts can accumulate on roads and cause dangerous driving conditions due to slippery and snow-covered roads.

Light snow with additional accumulation less than 1 inch is expected across central Oregon for the next several hours. Be careful when traveling this evening and prepare for winter weather conditions.

* WHAT...Wet snow. Additional snow accumulations up to one inch. * WHERE...Foothills of the Blue Mountains of Oregon. * WHEN...Until 7 PM PST this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Even light snowfall amounts can accumulate on roads and cause dangerous driving conditions due to slippery and snow-covered roads.

* WHAT...Wet snow. Additional snow accumulations up to one inch. * WHERE...North Central Oregon. * WHEN...Until 7 PM PST this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Even light snowfall amounts can accumulate on roads and cause dangerous driving conditions due to slippery and snow-covered roads.

ESFSEW A stronger storm will set up along the coast over the weekend with the potential to bring more significant precipitation to the region. Heaviest amounts over the southwestern slopes of the Olympic Mountains may result in potential for the Skokomish River to rise above flood stage Saturday afternoon. Snow levels around 4500 feet Saturday are expected to lower to around 3000 feet early Sunday morning. Ongoing precipitation through early next week could help keep the river levels elevated into Monday. Please monitor the latest river forecasts from the National Weather Service for additional information.

* WHAT...Snow expected at or above elevations greater than 3500 ft. Total snow accumulations at Stevens Pass between 8 and 12 inches expected. Significantly higher amounts will be possible at Mount Baker Ski Area. * WHERE...Cascades of Whatcom, Skagit, Snohomish, and King Counties, including Stevens Pass. * WHEN...From 1 PM Friday to 10 AM PST Sunday. * IMPACTS...Snow-covered roads and minor travel delays possible across Stevens Pass. * ADDITIONAL DETAILS...Lower amounts are expected at Snoqualmie Pass.

* WHAT...Snow expected. Total snow accumulations 1 to 4 inches across the valleys and lowlands. Above 3500 feet snow accumulations of 4 to 8 inches. * WHERE...Portions of Central and North Central Washington including but not limited to the higher benches around Wenatchee, Leavenworth, Plain, Waterville, Winthrop, Omak, Republic. Passes impacted are Sherman, Loup Loup, Blewett, Stevens, Disautel and Wauconda. * WHEN...From 4 PM Friday to 10 AM PST Saturday. * IMPACTS...Winter driving conditions. Drive with caution. * ADDITIONAL DETAILS...Snow will begin Friday morning or early afternoon, but accumulations will be little to none. The exception is west of Wenatchee along Highway 2 up towards Stevens Pass, where the lower elevations could see an inch. Locations along the Columbia River will see little if any snow through this event.

* WHAT...Significant coastal flooding possible. Inundation of 2 to 3 feet above ground level is likely along shorelines and low-lying coastal areas. Large waves of 17 to 19 feet are expected along the coast. * WHERE...North Coast zone. * WHEN...From Saturday morning through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. * ADDITIONAL DETAILS...Highest impacts will occur around the 11 AM high tide on Saturday. Forecast confidence is currently moderate in 2 to 3 feet of inundation. However, there is a 10 percent chance of water levels up to 3.5 feet above ground level. In addition to the expected flooding on Saturday, flooding may continue through Monday during the late morning to mid-day high tides.

* WHAT...For the Coastal Flood Advisory, minor coastal flooding with inundation of around 2 feet above ground level is expected. For the Coastal Flood Watch, significant coastal flooding possible. Inundation of 2 to 3 feet above ground level is likely along shorelines and low-lying coastal areas. Large waves of 17 to 19 feet are expected along the coast. * WHERE...Central Coast zone. * WHEN...For the Coastal Flood Advisory, from 7 AM to 1 PM PST Friday. For the Coastal Flood Watch, from Saturday morning through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. * ADDITIONAL DETAILS...Highest impacts will occur around the late morning high tide on Friday and Saturday. Additional flooding may continue through Monday during the late morning to mid-day high tides.