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* WHAT...Heavy snow and blowing snow expected. Total snow accumulations of 6 to 12 inches, with 1 to 2 feet expected above 5000 feet. Winds gusting as high as 60 mph. * WHERE...The Cascade and Siskiyou Mountains, including Howard Prairie, Union Creek, Crater Lake, Diamond Lake, Crescent Lake, Tennant, and all passes, including portions of Interstate 5 and highways 58, 138, 230, 62, 66, 97, and 140. * WHEN...From 4 PM Wednesday to 4 AM PST Friday. * IMPACTS...Travel could be very difficult to impossible. Blowing and drifting snow could significantly reduce visibility. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Although lesser snow amounts are possible along Interstate 5 at Siskiyou Summit and highway 66, travel impacts are still a concern due to the combination of snow and gusty winds. One inch per hour snowfall rates are expected in the Cascades between 4 AM and 4 PM Thursday. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Heavy snow expected above 2500 feet. Total snow accumulations of 4 to 8 inches, with over a foot in the mountains of the Kalmiopsis wilderness. Winds gusting as high as 50 mph. * WHERE...Elevations above 2500 feet in Josephine, Jackson, and Douglas, and eastern Coos and Curry counties, including Butte Falls, the Tiller-Trail Highway, Dead Indian Memorial Road, Toketee Falls, and portions of highways 62 and 140. * WHEN...From 4 PM Wednesday to 4 AM PST Friday. * IMPACTS...Travel could be very difficult to impossible. Patchy blowing snow could significantly reduce visibility. Gusty winds could bring down tree branches. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Heavy snow and blowing snow expected. Total snow accumulations of 4 to 8 inches. Winds gusting as high as 60 mph. * WHERE...Portions of northern Klamath County, including Crescent, Chemult, and highway 97 north of Chiloquin. * WHEN...From 4 PM Wednesday to 4 AM PST Friday. * IMPACTS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. Strong winds could cause tree damage. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Southwest winds 30 to 40 mph with gusts to 60 mph possible. * WHERE...Portions of southwest Idaho and southeast Oregon. * WHEN...From Thursday morning through Thursday evening. * IMPACTS...Damaging winds could blow down trees and power lines. Travel could be difficult, especially for high profile vehicles.

* WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Okanogan Valley, Waterville Plateau, Moses Lake Area, and Central Columbia Basin. * WHEN...From 7 AM Wednesday to 10 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 peak around midnight.

* WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Okanogan Valley, Waterville Plateau, Moses Lake Area, and Central Columbia Basin. * WHEN...From 7 AM Wednesday to 10 AM PST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...Heavy snow expected. Total snow accumulations above 4000 feet of 2 to 4 feet. Total snow accumulations below 4000 feet of 2 to 4 inches. Winds gusting as high as 50 mph. * WHERE...Stevens Pass, Stehekin, and Holden Village. * WHEN...From 4 PM this afternoon to 4 PM PST Thursday. * IMPACTS...Motorists should be prepared for winter driving conditions especially over the Cascade Passes. Strong winds could cause damage to trees and isolated power outages. * ADDITIONAL DETAILS...Snowfall rates of one inch per hour or more will likely occur at Stevens Pass. Heavy snowfall coupled with gusty winds could create white-out conditons at times.

* WHAT...Heavy snow expected above 4000 feet. Total snow accumulations between 6 and 12 inches. Winds gusting as high as 60 mph. * WHERE...Mountain Road, Cloverland Road, and Peola. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Wednesday morning and evening commutes. Very strong winds could cause extensive damage to trees and power lines.

* WHAT...Heavy snow expected. Total snow accumulations above 4000 feet of 1 to 3 feet. Total snow accumulations below 4000 feet of 2 to 4 inches. Winds gusting as high as 50 mph. * WHERE...Loup Loup Pass, Methow, Twisp, Winthrop, Plain, Leavenworth, Conconully, and Mazama. * WHEN...From 4 PM this afternoon to 4 PM PST Thursday. * IMPACTS...Motorists should be prepared for winter driving conditions especially over the Cascade Passes. Strong winds could cause damage to trees and isolated power outages. * ADDITIONAL DETAILS...Snowfall rates of one inch per hour or more will likely occur at Stevens Pass. Heavy snowfall coupled with gusty winds could create white-out conditons at times.

* WHAT...Snow expected. Most locations will have snow accumulations of up to 3 inches. Winds gusting as high as 40 mph. Highest snow totals will be along the Washington/Idaho border and the higher hills. * WHERE...Cheney, Davenport, Downtown Spokane, Colfax, Spokane Valley, La Crosse, Fairfield, Rosalia, Tekoa, Airway Heights, Oakesdale, Uniontown, Rockford, and Pullman. * WHEN...From 7 PM this evening to 11 AM PST Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute.

* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches. Winds gusting as high as 40 mph. * WHERE...Northport, Plummer, Tiger, Newport, Genesee, Coeur d'Alene, Kettle Falls, Colville, Springdale-Hunters Road, Moscow, Fruitland, Orin-Rice Road, Flowery Trail Road, Chewelah, Deer Park, Post Falls, Metaline Falls, Worley, Hayden, Ione, Potlatch, and Metaline. * WHEN...From 7 PM this evening to 10 AM PST Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. * ADDITIONAL DETAILS...Snow will transition to rain Wednesday morning that could lead to slush on roadways.

* WHAT...Heavy snow expected above 1000 feet. Total snow accumulations of up to 2 to 4 feet. Winds gusting as high as 40 mph on Wednesday. * WHERE...Cascade mountains of Whatcom and Skagit Counties, including the Mount Baker Ski Area, Cascade mountains of Snohomish and King Counties, including Stevens Pass, and Snoqualmie Pass and Cascade mountains of Pierce and Lewis Counties, including the Crystal Mountain Ski Area, Paradise on Mount Rainier. * WHEN...From 4 PM this afternoon to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult.

* WHAT...Heavy snow expected. Total snow accumulations of up to 1 to 3 feet. Winds gusting as high as 40 mph on Wednesday. * WHERE...Olympic mountains, including Hurricane Ridge. * WHEN...From 4 PM this afternoon to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of 4 to 11 inches, except 12 to 24 inches above 2000 feet. West to southwest winds could gust as high as 50 mph. * WHERE...In Washington, South Washington Cascades and South Washington Cascade Foothills. * WHEN...From Wednesday afternoon through Thursday night. * IMPACTS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. Gusty winds could bring down tree branches. Monitor the latest forecasts for updates on this situation.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of 4 to 11 inches, except 12 to 24 inches above 2500 feet. West to southwest winds could gust as high as 50 mph. * WHERE...In Oregon, Northern Oregon Cascade Foothills, Northern Oregon Cascades, Cascade Foothills in Lane County, Cascades in Lane County and Upper Hood River Valley. * WHEN...From Wednesday afternoon through late Thursday night. * IMPACTS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. Monitor the latest forecasts for updates on this situation.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of up to 3 to 8 inches, except 7 to 14 inches above 2500 feet. West to southwest winds could gust as high as 50 mph. * WHERE...Coast Range of Northwest Oregon and Central Coast Range of Western Oregon. * WHEN...From Wednesday evening through late Thursday night. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of 4 to 11 inches, except 10 to 24 inches above 2500 feet. Winds could gust as high as 50 mph. * WHERE...In Oregon, Northern Oregon Cascade Foothills, Northern Oregon Cascades, Cascade Foothills in Lane County, Cascades in Lane County and Upper Hood River Valley. In Washington, South Washington Cascades and South Washington Cascade Foothills. * WHEN...From Wednesday afternoon through late Thursday night. * IMPACTS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. Gusty winds could bring down tree branches.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of up to 3 to 8 inches, except 7 to 14 inches above 2500 feet. Winds could gust as high as 50 mph. * WHERE...Coast Range of Northwest Oregon and Central Coast Range of Western Oregon. * WHEN...From Wednesday evening through late Thursday night. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches.

* WHAT...Heavy snow possible above 1500 feet. Total snow accumulations of 4 to 11 inches, except 10 to 24 inches above 2500 feet. Winds could gust as high as 50 mph. * WHERE...In Oregon, Northern Oregon Cascade Foothills, Northern Oregon Cascades, Cascade Foothills in Lane County, Cascades in Lane County and Upper Hood River Valley. In Washington, South Washington Cascades and South Washington Cascade Foothills. * WHEN...From Wednesday afternoon through late Thursday night. * IMPACTS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. Gusty winds could bring down tree branches.

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 22 inches. Winds gusting as high as 55 mph. * WHERE...Upper Slopes of the Eastern Washington Cascades Crest. * WHEN...From 4 PM this afternoon to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult to impossible. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Periods of heavy snow will impact the Upper East Slopes of the Washington Cascades Tuesday evening into Wednesday morning, and again late Wednesday evening through Thursday.