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ESFSEW An atmospheric river will bring significant rainfall to the Olympic Peninsula Wednesday into Thursday. Widespread rainfall totals of 3 to 4 inches are expected in the mountains, with locally over 5 inches over the highest peaks are possible. Snow levels will remain around 4000 to 5000 ft during this time frame. An extended wet period with snow levels above 4000 ft Thursday through next weekend over the Olympics and into portions of southwestern Washington. The area of concern for additional river flooding impacts may expand east to include rivers in Thurston and Lewis counties. Please monitor the latest river forecasts from the National Weather Service for additional information.

* WHAT...Large breaking waves of 18 to 20 feet expected in the surf zone. * WHERE...North Coast and Central Coast zones. * WHEN...From 5 AM to 9 PM PST Monday. * IMPACTS...Large waves may wash over beaches, jetties, and other structures unexpectedly. Localized beach erosion is possible. People can be swept off rocks and jetties, and drown while observing high surf. * ADDITIONAL DETAILS...Waves just offshore on Monday morning are expected to be of a longer period with a dominant period of 20 to 22 seconds. This may enhance the risk for beach erosion and infrastructure damage on west or southwest facing beaches.

* WHAT...For the High Surf Advisory, large breaking waves of 21 to 26 feet. For the High Surf Warning, dangerously large breaking waves of 25 to 33 feet. * WHERE...The beaches and shorelines of Curry, Coos, and Douglas counties. * WHEN...For the High Surf Advisory, until 10 PM PST this evening. For the High Surf Warning, from 10 PM this evening to 4 AM PST Tuesday. * 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...The highest surf is expected Monday morning into Monday afternoon. Conditions are expected to slowly improve on Tuesday, but another round of dangerous surf conditions can be expected late Wednesday (Christmas Day) through Thursday, if not longer. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...For the High Surf Advisory, large breaking waves of 21 to 26 feet. For the High Surf Warning, dangerously large breaking waves of 25 to 33 feet. * WHERE...The beaches and shorelines of Curry, Coos, and Douglas counties. * WHEN...For the High Surf Advisory, until 10 PM PST this evening. For the High Surf Warning, from 10 PM this evening to 4 AM PST Tuesday. * 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...The highest surf is expected Monday morning into Monday afternoon. Conditions are expected to slowly improve on Tuesday, but another round of dangerous surf conditions can be expected late Wednesday (Christmas Day) through Thursday, if not longer. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Large waves and hazardous surf conditions. Breakers up to 25 to 30 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...Until 10 PM PST Monday. * IMPACTS...Destructive waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Minor beach erosion may damage coastal properties and buildings. Higher than normal water run-up is expected on beaches and low-lying shoreline. Enhanced possibility for sneaker waves.

* WHAT...Large waves and hazardous surf conditions. Breakers up to 25 to 30 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...Until 10 PM PST Monday. * IMPACTS...Destructive waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Minor beach erosion may damage coastal properties and buildings. Higher than normal water run-up is expected on beaches and low-lying shoreline. Enhanced possibility for sneaker waves.

* WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...This includes the Summer Lake area and the mountains across Lake County and eastern Klamath County, and Modoc County. * WHEN...From 7 PM Monday to 4 AM PST Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...For the first Wind Advisory, southeast winds 20 to 30 mph with gusts up to 45 mph. For the second Wind Advisory, southeast winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Southern Rogue Valley, including the city of Ashland, Talent and Phoenix. * WHEN...For the first Wind Advisory, until 5 PM PST this afternoon. For the second Wind Advisory, from 1 PM to 8 PM PST Monday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT...For the first Wind Advisory, southeast winds 20 to 30 mph with gusts up to 45 mph. For the second Wind Advisory, southeast winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Southern Rogue Valley, including the city of Ashland, Talent and Phoenix. * WHEN...For the first Wind Advisory, until 5 PM PST this afternoon. For the second Wind Advisory, from 1 PM to 8 PM PST Monday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

...The Flood Warning continues for the following rivers in Washington... Skokomish River At Potlatch affecting Mason County. .The river has fallen below minor flood stage this morning, but with additional precipitation falling today, it is forecast to rise above minor flood stage again this afternoon. Additional systems through the next week will keep the river above flood stage. * WHAT...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 Sunday the stage was 16.3 feet. - Flood stage is 16.5 feet. - Forecast...The river is expected to rise above flood stage this afternoon and continue rising to a crest of 17.4 feet late this evening. The river will slowly fall and may briefly fall just below flood stage on Wednesday. - http://www.weather.gov/safety/flood

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Mansfield, Waterville, and Badger Mountain Road. * WHEN...Until 1 PM PST this afternoon. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility less than one-half mile in fog. * WHERE...Lower Columbia Basin of Washington. * WHEN...Until noon PST today. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility one-quarter mile or less in freezing fog. * WHERE...Kittitas Valley. * WHEN...Until noon PST today. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Southeast winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Central Coast and North Coast. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Patchy dense fog has developed across the Tri-Cities this morning and will affect portions of I-82 and I-182, SR-240 and US-395. Visibilities of less than 1/2 mile can be expected in places. Motorists should be prepared for sudden changes in visibility. If you encounter dense fog, slow down and use low beam headlights.

* WHAT...Visibility one-quarter mile or less in freezing fog. * WHERE...Kittitas Valley and Yakima Valley. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility one-quarter mile or less in freezing fog. * WHERE...Lower Columbia Basin of Oregon. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

...The Flood Warning continues for the following rivers in Washington... Skokomish River At Potlatch affecting Mason County. .The river will be just below minor flood stage until around 10 AM PST today, but with additional precipitation arriving, it is forecast to again rise above minor flood stage this afternoon. * WHAT...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 2:30 AM PST Sunday the stage was 16.4 feet. - Flood stage is 16.5 feet. - Forecast...The river is expected to rise above flood stage late this morning and continue rising to 16.9 feet late this evening. Additional rises are possible thereafter. - Flood History...This crest compares to a previous crest of 16.8 feet on 11/23/1990. - http://www.weather.gov/safety/flood

* WHAT...Large waves and hazardous surf conditions. Breakers up to 25 to 30 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...Until 10 PM PST Monday. * IMPACTS...Destructive waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Minor beach erosion may damage coastal properties and buildings. Higher than normal water run-up is expected on beaches and low- lying shoreline. Enhanced possibility for sneaker waves.

* WHAT...Large waves and hazardous surf conditions. Breakers up to 25 to 30 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...Until 10 PM PST Monday. * IMPACTS...Destructive waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Minor beach erosion may damage coastal properties and buildings. Higher than normal water run-up is expected on beaches and low- lying shoreline. Enhanced possibility for sneaker waves.