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A series of wet frontal systems will produce periods of moderate to heavy precipitation through this weekend. Significant rises are expected late this week, but especially Saturday night into early next week. Forecast precipitation totals from Friday night through Sunday could reach 1 to 3 inches over the west side valleys, with 3 to 6 inches possible in the mountains and along the coast. Up to 8 inches of rain could fall in the Curry coastal ranges. This rainfall will increase the risk for both flash flooding, especially over area burn scars, as well as small stream and river flooding. * WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of southwest Oregon and northern California. This includes all valleys west of the Cascades and the cities of Roseburg, Medford, Cave Junction, Grants Pass, Coos Bay, Gold Beach, Yreka and Mount Shasta City. * WHEN...From Saturday morning through Sunday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Storm drains and ditches may become clogged with debris. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

...The Flood Warning continues for the following rivers in Oregon... Coquille River at Coquille affecting Coos County. For the Coquille River...including Coquille...Moderate flooding is forecast. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Coquille River at Coquille. * WHEN...Until early Tuesday afternoon. * IMPACTS...At 24.0 feet, Homes and roads are threatened in low-lying areas along and near the Coquille River. Expect significant widespread flooding throughout the Coquille River estuary to Myrtle Point. * ADDITIONAL DETAILS... - At 11:45 AM PST Friday the stage was 21.6 feet. - Bankfull stage is 20.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:45 AM PST Friday was 21.6 feet. - Forecast...The river will oscillate above flood stage with a maximum value of 23.8 feet Monday morning. It will fall below flood stage early Tuesday afternoon. - Flood stage is 21.0 feet. - Flood History...This crest compares to a previous crest of 23.8 feet on 12/04/1980. - http://www.weather.gov/safety/flood

...The National Weather Service in Medford OR has issued a Flood Watch for the following rivers in Oregon... Rogue River near Agness affecting Eastern Curry County and Josephine County and Curry County Coast zones. Deer Creek at Roseburg affecting Central Douglas County zone. For the Rogue River...including GOLD BEACH, Rogue Fish Hatchery, Eagle Point, Gold Ray, Grants Pass, Agness...flooding is possible. For the Deer Creek...including Roseburg, Roseburg...flooding is possible. * WHAT...Minor flooding is possible due to excessive rainfall. * WHERE...Deer Creek at Roseburg. * WHEN...Until early Tuesday afternoon. * IMPACTS...At 11.5 feet, Water begins to cover Douglas Avenue west of Dawson Road. * ADDITIONAL DETAILS... - At 10:52 AM PST Friday the stage was 6.2 feet. - Forecast...Flood stage may be reached early Sunday morning. - Flood stage is 10.0 feet. - http://www.weather.gov/safety/flood

...The National Weather Service in Medford OR has issued a Flood Watch for the following rivers in Oregon... Rogue River near Agness affecting Eastern Curry County and Josephine County and Curry County Coast zones. Deer Creek at Roseburg affecting Central Douglas County zone. For the Rogue River...including GOLD BEACH, Rogue Fish Hatchery, Eagle Point, Gold Ray, Grants Pass, Agness...flooding is possible. For the Deer Creek...including Roseburg, Roseburg...flooding is possible. * WHAT...Minor flooding is possible due to excessive rainfall. * WHERE...Rogue River near Agness. * WHEN...Until early Tuesday afternoon. * ADDITIONAL DETAILS... - At 11:30 AM PST Friday the stage was 13.6 feet. - Forecast...Flood stage may be reached Sunday morning. - Flood stage is 17.0 feet. - http://www.weather.gov/safety/flood

...The National Weather Service in Portland OR has issued a Flood Warning for the following rivers in Oregon... Luckiamute River near Suver affecting Polk and Benton Counties. * WHAT...Minor flooding is forecast. * WHERE...Luckiamute River near Suver. * WHEN...From this late afternoon to late tomorrow morning. * IMPACTS...Above 27.0 feet, expect flooding of low lying and agricultural lands in the vicinity of Sarah Helmick State Park, Highway 99W, and Parker Road. Some secondary roads and rural access roads may be flooded at this point. Flooding along Buena Vista Rd near the confluence with the Willamette is also likely, especially if the Willamette is running high. * ADDITIONAL DETAILS... - At 10:30 AM PST Friday the stage was 26.2 feet. - Bankfull stage is 25.0 feet. - Forecast...The river will rise above flood stage late this afternoon to 27.2 feet late this evening. It will then fall below flood stage just after midnight tonight to 23.7 feet late Sunday morning. It will rise to 26.0 feet early Monday morning. - Flood stage is 27.0 feet. - http://www.weather.gov/safety/flood

* WHAT...Southwest winds 25 to 35 mph with gusts up to 60 mph expected. * WHERE...Lake County and eastern Klamath County, Central Siskiyou County, Modoc County, and Eastern Curry County and Josephine County. * WHEN...From 7 PM this evening to 1 PM PST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...Dangerously large breaking waves of 25 to 30 feet. * WHERE...The beaches and shorelines of Curry, Coos, and Douglas counties. * 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. Infrastructure damage and significant beach erosion can be expected. * ADDITIONAL DETAILS...Hazardous surf and beach conditions are likely to continue through much of the weekend, with improving conditions possible on Sunday. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

...The Flood Warning continues for the following rivers in Washington... Skokomish River At Potlatch affecting Mason County. .Additional rounds of rain over the Olympics this weekend will keep the Skokomish River above flood stage. * 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 9:30 AM PST Friday the stage was 17.2 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 steady above flood stage at 17.0 feet through the next few days. - http://www.weather.gov/safety/flood

* WHAT...Sneaker waves possible. * WHERE...In Oregon, Central Coast of Oregon. In Washington, South Washington Coast. * WHEN...Through Sunday evening. * IMPACTS...Waves can run up significantly farther on a beach than normal, including over rocks and jetties. A 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...For the Coastal Flood Advisory, tidal overflow flooding. For the Beach Hazards Statement, Sneaker waves possible. * WHERE...Clatsop and Tillamook Coast. * WHEN...For the Coastal Flood Advisory, until 2 PM PST Saturday. For the Beach Hazards Statement, through Sunday evening. * IMPACTS...Minor flooding, up to one foot above ground level, during high tides is expected in the low lying areas near bays, sloughs, and the lower reaches of the coastal rivers. Waves can run up significantly farther on a beach than normal, including over rocks and jetties. A 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. * ADDITIONAL DETAILS...High tide of 8.9 ft on Friday at 10 am and 9.2 ft on Saturday at 11 am. Impacts will be limited to within 2 to 3 hours of those times.

* WHAT...Sneaker waves possible. * WHERE...In Oregon, Central Coast of Oregon. In Washington, South Washington Coast. * WHEN...Through Sunday evening. * IMPACTS...Waves can run up significantly farther on a beach than normal, including over rocks and jetties. A 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...For the Coastal Flood Advisory, tidal overflow flooding. For the Beach Hazards Statement, Sneaker waves possible. * WHERE...Clatsop and Tillamook Coast. * WHEN...For the Coastal Flood Advisory, until 2 PM PST Saturday. For the Beach Hazards Statement, through Sunday evening. * IMPACTS...Minor flooding, up to one foot above ground level, during high tides is expected in the low lying areas near bays, sloughs, and the lower reaches of the coastal rivers. Waves can run up significantly farther on a beach than normal, including over rocks and jetties. A 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. * ADDITIONAL DETAILS...High tide of 8.9 ft on Friday at 10 am and 9.2 ft on Saturday at 11 am. Impacts will be limited to within 2 to 3 hours of those times.

ESFSEW Additional frontal systems will bring precipitation to Western Washington at times through the weekend. While precipitation will be much less with the systems today and into this weekend, the lack of much of a break will keep rivers over the Southwest Interior rising into the weekend. The potential for the lower reaches of the Chehalis River to flood on Saturday continues to be monitored. Please monitor the latest river forecasts from the National Weather Service for additional information.

* WHAT...Heavy snow. Total snow accumulations between 15 to 20 inches. * WHERE...Stevens Pass and Holden Village. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Periods of snow today 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...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...Until 4 PM PST Saturday. * IMPACTS...Heavy snowfall and very low visibility will create extremely dangerous 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...Until 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...Travel could be difficult due to periods of moderate to heavy snow.

* 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...Until 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 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...Wet snow above 4500 feet. Additional snow accumulations of 2 to 4 inches. Winds gusting as high as 40 mph. * WHERE...East Slopes of the Oregon Cascades. * WHEN...Until 7 PM PST this evening. * IMPACTS...Plan on slippery road conditions.