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* WHAT...Heavy snow possible. Total snow accumulations of 12 to 24 inches possible. Winds could gust as high as 45 mph. * WHERE...Upper Slopes of the Eastern Washington Cascades Crest. * WHEN...From Sunday morning through Monday afternoon. * IMPACTS...Travel could be very difficult to impossible. Widespread blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning commute.

* WHAT...Heavy snow possible. Total snow accumulations of 8 to 16 inches possible. Winds could gust as high as 45 mph. * WHERE...East Slopes of the Oregon Cascades. * WHEN...From Sunday afternoon through Monday afternoon. * IMPACTS...Travel could be very difficult to impossible. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning commute.

* WHAT...Heavy snow possible. Total snow accumulations between 3 and 30 inches possible. Winds could gust as high as 55 mph. * WHERE...Stehekin, Holden Village, and Stevens Pass. * WHEN...From late Saturday night through Monday afternoon. * IMPACTS...Travel could be very difficult to impossible especially over Stevens Pass on State Highway 2. The hazardous conditions could impact travel Sunday evening and Monday. Strong winds could cause damage to trees and isolated power outages. * ADDITIONAL DETAILS...Heavy snowfall rates of one inch per hour Sunday evening for up to 12 hours.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of 10 to 23 inches possible. Winds could gust as high as 50 mph. * WHERE...Cascade mountains and valleys of Pierce and Lewis Counties, including the Crystal Mountain Ski Area and Paradise on Mount Rainier. * WHEN...From Sunday morning through Monday afternoon. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of 12 to 30 inches possible. Winds could gust as high as 45 mph. * WHERE...Cascade mountains of Whatcom and Skagit Counties, including the Mount Baker Ski Area, and Cascade mountains of Snohomish and King Counties, including Stevens Pass and Snoqualmie Pass. * WHEN...From late Saturday night through Monday afternoon. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...A rain and snow mix is likely at Snoqualmie Pass on Sunday becoming snow Sunday evening through Monday.

* WHAT...Heavy snow possible above 2000 feet. Total snow accumulations of 8 to 12 inches, except 12 to 22 inches above 2500 feet possible. Winds could gust as high as 50 mph. * WHERE...South Washington Cascades and South Washington Cascade Foothills. * WHEN...From Sunday morning through Monday afternoon. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches.

* WHAT...Heavy snow possible above 2000 feet. Total snow accumulations of 4 to 8 inches possible. Winds could gust as high as 50 mph. * WHERE...Upper Hood River Valley. * WHEN...From Sunday afternoon through Monday afternoon. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. Gusty winds could bring down tree branches.

* WHAT...Heavy snow possible above 2000 feet. Total snow accumulations of 5 to 12 inches, except 10 to 19 inches above 2500 feet possible. Winds could gust as high as 50 mph. * WHERE...Northern Oregon Cascade Foothills, Northern Oregon Cascades, Cascade Foothills in Lane County and Cascades in Lane County. * WHEN...From Sunday afternoon through Monday afternoon. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches.

There will still be patches of dense fog for the next couple of hours but widespread dense fog is no longer anticipated. If you encounter dense fog, slow down and allow for extra space between your vehicle and those around you.

There will still be patches of dense fog for the next couple of hours but widespread dense fog is no longer anticipated. If you encounter dense fog, slow down and allow for extra space between your vehicle and those around you.

Patchy fog and freezing fog has developed this morning which has reduced visibilities to 1/2 mile or less in spots. Additionally, any freezing fog could cause slick spots on roadways. If you encounter fog or freezing fog slow down and allow for extra space between your vehicle and those around you. The fog is expected to dissipate by 11 AM.

Areas of fog are found around the western Columbia Basin and Waterville Plateau and it is locally dense in spots, with visibilities to one-half mile or less. This includes I-90 near Moses Lake west toward George. Use caution when traveling this morning and when encountering fog slow down and increase following distance.

* WHAT...Visibility a quarter of a mile or less at times in dense fog. * WHERE...In Oregon, Eastern Columbia River Gorge of Oregon. In Washington, Eastern Columbia River Gorge of Washington and Kittitas Valley. * WHEN...Until 11 AM PST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Conditions will begin to improve in the late morning.

* WHAT...Visibility a quarter of a mile or less at times in dense fog. * WHERE...In Oregon, Eastern Columbia River Gorge of Oregon. In Washington, Eastern Columbia River Gorge of Washington and Kittitas Valley. * WHEN...Until 11 AM PST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Conditions will begin to improve in the late morning.

Areas of fog are found around the Columbia Basin and it is locally dense in spots, with visibilities to one-half mile or less. This includes I-90 from near Ritzville to Moses Lake and westward toward George. Use caution when traveling tonight and when encountering fog slow down and increase following distance.

Steadier rainfall over the southern Olympics has led to a steady rise on the Skokomish River, which could push the river above flood stage by early Thursday morning. Rain will taper off late tonight into Thursday morning. * WHAT...Flooding caused by excessive rainfall is possible. * WHERE...A portion of northwest Washington, including the following county, Mason. * WHEN...Through Thursday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Fairfield, Downtown Spokane, Uniontown, Grand Coulee, Tekoa, Ritzville, Pullman, Creston, Worley, La Crosse, Harrington, Post Falls, Davenport, Spokane Valley, Colfax, Airway Heights, Rosalia, Wilbur, Hayden, Oakesdale, Coulee City, Rockford, Odessa, Coeur d'Alene, and Cheney. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility of a quarter of a mile or less in dense fog. * WHERE...In Oregon, Foothills of the Northern Blue Mountains of Oregon and Foothills of the Southern Blue Mountains of Oregon. In Washington, Foothills of the Blue Mountains of Washington. * WHEN...Until 11 AM PST Wednesday. * IMPACTS...Hazardous driving conditions due to low visibility.

* WHAT...Visibility of a quarter of a mile or less in dense fog. * WHERE...In Oregon, Foothills of the Northern Blue Mountains of Oregon and Foothills of the Southern Blue Mountains of Oregon. In Washington, Foothills of the Blue Mountains of Washington. * WHEN...Until 11 AM PST Wednesday. * IMPACTS...Hazardous driving conditions due to low visibility.

Areas of fog are found around Spokane County, the Upper Columbia Basin into the Palouse and in some portions of the northern Panhandle. This is locally dense with visibilities to 1/2 mile or less. Areas impacted include I-90 from Ritzville to Spokane, US-195, US-95 and US-2. Use caution and increase following distance in fog.