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* WHAT...Sneaker waves possible. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...Through Sunday evening. * IMPACTS...Waves can run up significantly farther on a beach than normal, including over rocks and jetties. Sneaker waves can suddenly knock people off of their feet and quickly pull them into the frigid ocean which may lead to serious injury or drowning.

* WHAT...Sneaker waves possible. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...Through Sunday evening. * IMPACTS...Waves can run up significantly farther on a beach than normal, including over rocks and jetties. Sneaker waves can suddenly knock people off of their feet and quickly pull them into the frigid ocean which may lead to serious injury or drowning.

ESFPQR A series of storm systems will continue to bring a wet weather pattern across northwest Oregon through the weekend. This will lead to rises on rivers and creeks through at least December 30th. There is currently a 30-50% chance that several rivers in northwest Oregon will reach minor flood stage over the next 10 days, including: the Wilson River, Siletz River, Tualatin River, Siuslaw River, Marys Rivers, and the Pudding River. The Luckiamute River has the highest chance of hitting minor flood stage at 85%. In addition, there is a 20-25% chance the Nehalem River, Trask River, Yamhill River and Mohawk River will reach minor flood stage. Heavy rainfall may also lead to ponding of water, general lowland flooding and localized urban flooding, especially in low lying areas or other areas with poor drainage. Heavy rainfall will also increase the potential for landslides in areas of steep terrain and debris flows over areas that have been burned by wildfires over the past few years. There is still some uncertainty regarding the exact track of these upcoming storm systems and associated rain amounts. There is currently a 10% chance the southern Willamette Valley will receive 2-3" of rain and the adjacent higher terrain of the Coast Range and Cascades will receive 3-5" of rain Saturday evening through Sunday morning. This represents the worst case scenario, which would result in more widespread flooding issues. That said, the most likely scenario is 1-2" of rain in the southern Willamette Valley and 2-3" in the adjacent higher terrain of the Coast Range and Cascades. This would result in minor and less widespread flooding. Shifts in the forecast storm track can change the current outlook, so be sure to monitor weather.gov/portland for the latest weather updates, as well as any watches, warnings, or advisories that may be issued. To view the latest river forecasts, visit water.noaa.gov/wfo/pqr.

ESFPQR A series of storm systems will continue to bring a wet weather pattern across northwest Oregon through the weekend. This will lead to rises on rivers and creeks through at least December 30th. There is currently a 30-50% chance that several rivers in northwest Oregon will reach minor flood stage over the next 10 days, including: the Wilson River, Siletz River, Tualatin River, Siuslaw River, Marys Rivers, and the Pudding River. The Luckiamute River has the highest chance of hitting minor flood stage at 85%. In addition, there is a 20-25% chance the Nehalem River, Trask River, Yamhill River and Mohawk River will reach minor flood stage. Heavy rainfall may also lead to ponding of water, general lowland flooding and localized urban flooding, especially in low lying areas or other areas with poor drainage. Heavy rainfall will also increase the potential for landslides in areas of steep terrain and debris flows over areas that have been burned by wildfires over the past few years. There is still some uncertainty regarding the exact track of these upcoming storm systems and associated rain amounts. There is currently a 10% chance the southern Willamette Valley will receive 2-3" of rain and the adjacent higher terrain of the Coast Range and Cascades will receive 3-5" of rain Saturday evening through Sunday morning. This represents the worst case scenario, which would result in more widespread flooding issues. That said, the most likely scenario is 1-2" of rain in the southern Willamette Valley and 2-3" in the adjacent higher terrain of the Coast Range and Cascades. This would result in minor and less widespread flooding. Shifts in the forecast storm track can change the current outlook, so be sure to monitor weather.gov/portland for the latest weather updates, as well as any watches, warnings, or advisories that may be issued. To view the latest river forecasts, visit water.noaa.gov/wfo/pqr.

* WHAT...Southwest winds 30 to 40 mph with gusts up to 75 mph. * WHERE...Lake County and eastern Klamath County, and Modoc County, including the Summer Lake area and Highway 31, the mountains across Lake County and eastern Klamath County, and Modoc County. * WHEN...Until 10 AM PST this morning. * 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...Dangerously large breaking waves of 25 to 30 feet. * WHERE...South Central Oregon Coast and Curry County Coast. * WHEN...Until 7 AM PST Sunday. * IMPACTS...Extremely large breaking waves will create very hazardous conditions along beaches and area shorelines. Waves will inundate beaches and surge into normally dry areas especially during high tides. Infrastructure damage and significant beach erosion can be expected. * ADDITIONAL DETAILS...Surf conditions will be occasionally worsened by high winds and seas as fronts pass each day through Sunday. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Large breaking waves of 14 to 20 feet in the surf zone. * WHERE...North Coast and Central Coast zones. * WHEN...Until 10 AM PST this morning. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion.

* WHAT...Wet snow above 4000 feet. Additional snow accumulations of 2 to 6 inches, with the highest snow amounts above 5000 feet. Winds gusting as high as 35 mph. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon. * WHEN...Until 7 PM PST this evening. * IMPACTS...Travel could be difficult at times. Be prepared for snow covered roads and slick surfaces. * ADDITIONAL DETAILS...An active storm track will continue to produce accumulating snow across the passes in the Cascades into this weekend. However, there are two time periods when snow levels will likely rise to 5000-5500 feet and be far enough above the passes to temporarily limit snow accumulations. The first window where snow levels will rise above the passes will occur between 3 AM Friday and 9 AM Friday. Another round of warmer air aloft will most likely push snow levels above the passes Friday night as well.

* WHAT...Wet snow above 4000 feet. Additional snow accumulations of 2 to 6 inches, with the highest snow amounts above 5000 feet. Winds gusting as high as 35 mph. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon. * WHEN...Until 7 PM PST this evening. * IMPACTS...Travel could be difficult at times. Be prepared for snow covered roads and slick surfaces. * ADDITIONAL DETAILS...An active storm track will continue to produce accumulating snow across the passes in the Cascades into this weekend. However, there are two time periods when snow levels will likely rise to 5000-5500 feet and be far enough above the passes to temporarily limit snow accumulations. The first window where snow levels will rise above the passes will occur between 3 AM Friday and 9 AM Friday. Another round of warmer air aloft will most likely push snow levels above the passes Friday night as well.

* WHAT...Snow. Additional snow accumulations of 1 to 4 inches, except 4 to 8 inches in the mountains. * WHERE...Baker County and northern portions of Harney County, and Malheur County. * WHEN...Until 10 AM PST /11 AM MST/ this morning. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult.

...The Flood Warning continues for the following rivers in Washington... Skokomish River At Potlatch affecting Mason County. .Rounds of rain over the Olympics will keep the Skokomish River above flood stage through the weekend. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Skokomish River at Potlatch. * WHEN...Until further notice. * IMPACTS...At 16.5 feet, the Skokomish River will cause widespread flooding of pasture lands, with water flowing quickly over West Bourgault Road and Skokomish Valley Road. * ADDITIONAL DETAILS... - At 10:30 PM PST Thursday the stage was 17.4 feet. - Flood stage is 16.5 feet. - The river crested at 17.5 feet around 5 PM Thursday. - Forecast...The river is expected to remain between 17 and 17.4 feet into Saturday morning. - http://www.weather.gov/safety/flood

* WHAT...Snow. Total snow accumulations between 6 and 12 inches above 3500 feet and 2 to 6 inches below 3500 feet. Highest snow accumulations above pass level. * WHERE...Upper Slopes of the Eastern Washington Cascades Crest. * WHEN...From 1 AM Friday to 4 PM PST Saturday. * IMPACTS...Significant snowfall with periods of heavy snowfall rates will combine with low visibility to create very difficult driving conditions.

* WHAT...Snow. Total snow accumulations of 6 to 12 inches above 4500 feet. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...From 1 AM Friday to 4 AM PST Saturday. * IMPACTS...Periods of moderate and heavy snow will combine with low visibilities to create difficult driving conditions.

* WHAT...Snow. Total snow accumulations of 6 to 12 inches above 4500 feet. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...From 1 AM Friday to 4 AM PST Saturday. * IMPACTS...Periods of moderate and heavy snow will combine with low visibilities to create difficult driving conditions.

* WHAT...Snow. Total snow accumulations of 3 to 6 inches above 4500 feet and 1 to 3 inches below 4000 feet. Winds gusting as high as 35 mph. * WHERE...Ochoco-John Day Highlands. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Significant snowfall with periods of heavy snowfall rates will combine with low visibility to create very difficult driving conditions.

* WHAT...Snow. Total snow accumulations of 4 to 8 inches above 4000 feet. * WHERE...Southern Blue Mountains of Oregon. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Travel could be difficult due to periods of moderate to heavy snow.

* WHAT...Snow. Additional snow accumulations of 5 to 9 inches above 4500 feet and 2 to 4 inches between 4000 and 4500 feet. * WHERE...East Slopes of the Oregon Cascades. * WHEN...Until 7 PM PST Friday. * IMPACTS...Travel could be difficult due to periods of moderate to heavy snow. Gusty winds could bring down tree branches.

* WHAT...Snow expected. Total snow accumulations between 15 to 20 inches. * WHERE...Holden Village and Stevens Pass. * WHEN...From 1 AM Friday to 4 PM PST Saturday. * IMPACTS...Periods of snow Friday and Saturday will create winter driving conditions over Stevens Pass. * ADDITIONAL DETAILS...Motorists should check pass conditions for potential closures due to avalanche control.

* WHAT...Southwest winds 30 to 40 mph with gusts up to 70 mph expected. * WHERE...Lake County and eastern Klamath County, and Modoc County, including the Summer Lake area and Highway 31, the mountains across Lake County and eastern Klamath County, and Modoc County. * WHEN...From midnight tonight to 10 AM PST Friday. * 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...Southwest winds 20 to 35 mph with gusts up to 50 mph expected. * WHERE...Klamath Basin, including Klamath Falls and Highway 140. * WHEN...From midnight tonight to 10 AM PST Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.