Aggregator

* WHAT...Wet snow above 4500 feet. Additional snow accumulations of 2 to 6 inches. Winds gusting as high as 35 mph. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Plan on slippery road conditions.

* WHAT...Wet snow above 4500 feet. Additional snow accumulations of 2 to 6 inches. Winds gusting as high as 35 mph. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Plan on slippery road conditions.

* WHAT...Wet snow above 4000 feet. Additional snow accumulations up to three inches. Winds gusting as high as 35 mph. * WHERE...Southern Blue Mountains of Oregon. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Plan on slippery road conditions.

* WHAT...Wet snow above 4000 feet. Additional snow accumulations up to three inches. Winds gusting as high as 35 mph. * WHERE...Ochoco-John Day Highlands. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Even light snowfall amounts can accumulate on roads and cause dangerous driving conditions due to slippery and snow-covered roads.

* WHAT...Wet snow above 4500 feet. Additional snow accumulations up to three 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.

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 Chehalis River appears to be cresting this afternoon well below flood stage through Thurston and Lewis Counties, but will continue to monitor the Chehalis at Porter in Grays Harbor County as it is still forecast just shy of flood stage this weekend. Please monitor the latest river forecasts from the National Weather Service for additional information.

* WHAT...Total snow accumulations between 6 and 18 inches with 24 inches possible on Mount Rainier. Heaviest snow above 5000 feet. * WHERE...West Slopes North Central Cascades and Passes and West Slopes South Central Cascades and Passes. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Travel could be very difficult to impossible. * ADDITIONAL DETAILS...2 to 4 inches of new snow tonight at Snoqualmie Pass before the snow mix with or changes to rain Saturday morning.

* WHAT...Total snow accumulations between 6 and 18 inches. * WHERE...West Slopes North Cascades and Passes. * WHEN...From 4 PM this afternoon to 4 PM PST Saturday. * IMPACTS...Travel could be very difficult to impossible.

* WHAT...Large breaking waves of 18 to 20 feet expected in the surf zone. * WHERE...North Coast and Central Coast zones. * WHEN...From 1 AM to 7 PM PST Saturday. * 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.

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. The Luckiamute River has the highest chance of hitting minor flood stage at 95%. There is a 40-45% chance that the Pudding River will reach minor flood stage, and a 20-25% chance that the Wilson River, Siuslaw River, and Marys Riverwill 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 the Sunday system. 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.

Another wet storm system arrives tonight and persists through Saturday morning. This system will produce a wet snowfall which could make roads slick. Accumulations will be highest above 5500 feet. * WHAT...Mixed precipitation above 4000 feet. Additional snow accumulations up to 8 inches up to 5500 feet, and up to 10 inches along the peaks. Winds gusting as high as 45 mph and up to 55 mph along the peaks. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon. * WHEN...Until 1 PM PST Saturday. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches. Wet snow will still accumulate which can make for slick driving conditions. * ADDITIONAL DETAILS...A brief lull in precipitation today will quickly ramp up after 6 PM. Snow amounts will be greatest above 5500 feet where up to 15 inches is possible. Snow levels will hover right around pass level. Winds will be gusty tonight around 45 mph but there is a 30% chance of gusts greater than 55 mph. If these wind gusts were to occur, reduced visibility is possible.

Another wet storm system arrives tonight and persists through Saturday morning. This system will produce a wet snowfall which could make roads slick. Accumulations will be highest above 5500 feet. * WHAT...Mixed precipitation above 4000 feet. Additional snow accumulations up to 8 inches up to 5500 feet, and up to 10 inches along the peaks. Winds gusting as high as 45 mph and up to 55 mph along the peaks. * WHERE...South Washington Cascades and the Northern and Central Cascades of Oregon. * WHEN...Until 1 PM PST Saturday. * IMPACTS...Travel could be very difficult. Gusty winds could bring down tree branches. Wet snow will still accumulate which can make for slick driving conditions. * ADDITIONAL DETAILS...A brief lull in precipitation today will quickly ramp up after 6 PM. Snow amounts will be greatest above 5500 feet where up to 15 inches is possible. Snow levels will hover right around pass level. Winds will be gusty tonight around 45 mph but there is a 30% chance of gusts greater than 55 mph. If these wind gusts were to occur, reduced visibility is possible.

* WHAT...Southwest winds 15 to 30 mph with gusts 40 to 50 mph expected. * WHERE...Oakesdale, Colfax, Genesee, La Crosse, Clarkston, Plummer, Moscow, Tekoa, Rosalia, Pomeroy, Pullman, Uniontown, Alpowa Summit, and Potlatch. * WHEN...From 10 AM to 4 PM PST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Light to moderate snow will impact the Cascade and Idaho mountain passes through the weekend. Snow will increase Sunday into Monday in the mountains of North Idaho. * WHAT...Snow. Additional snow accumulations between 7 and 13 inches. Winds gusting as high as 40 mph on the ridgetops. * WHERE...Stehekin, Holden Village, and Stevens Pass. * WHEN...Until 4 PM PST Saturday. * IMPACTS...Periods of snow tonight and Saturday will create winter driving conditions over Stevens Pass. * ADDITIONAL DETAILS...Snow amounts at Stehekin of 2 to 5 inches.

* 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...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.

* 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.

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