Aggregator

* WHAT...Heavy snow possible. Total snow accumulations between 18 and 24 inches possible above 3500 feet. * WHERE...Stevens Pass, Stehekin, and Holden Village. * WHEN...From Wednesday afternoon through Friday morning. * IMPACTS...Travel could be very difficult over Stevens Pass. * ADDITIONAL DETAILS...Expect snowfall rates around 1 inch per hour or greater at Stevens Pass Wednesday night. For Coles Corner and Stehekin, total snow accumulations between 5 and 12 inches.

* WHAT...Snow expected. Total snow accumulations 3 to 8 inches. * WHERE...Conconully, Winthrop, Mazama, Twisp, Methow, and Loup Loup Pass. * WHEN...From 10 PM this evening to 10 AM PST Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday morning commute. * ADDITIONAL DETAILS...Snowfall rates of 1" per hour are possible between midnight and 5 AM tonight, especially around Mazama and Loup Loup Pass.

ESFSEW An atmospheric river will bring significant rainfall to the Olympic Peninsula Wednesday into Thursday. Widespread rainfall totals of 4 to 6 inches are expected in the mountains, with locally over 6 inches over the highest peaks. Snow levels will begin around 3000 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...South winds 25 to 35 mph with gusts 45 to 55 mph expected for the base of the Blue Mountains of Washington. * WHERE...Foothills of the Blue Mountains of Washington. * WHEN...From 10 PM this evening to 7 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...Visibility of one-quarter mile or less in dense fog. * WHERE...Kittitas Valley. * WHEN...Until 10 PM PST this evening. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility as low as one-quarter mile in dense fog. * WHERE...Lower Columbia Basin of Washington. * WHEN...Until 10 PM PST this evening. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility as low as one-quarter mile in dense fog. * WHERE...Yakima Valley. * WHEN...Until 10 PM PST this evening. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected, mainly south of La Grande. * WHERE...Grande Ronde Valley. * WHEN...From 10 PM this evening to 7 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...South to southeast winds 30 to 40 mph with gusts 55 to 65 mph expected for the base of the northern Blue Mountains of Oregon. * WHERE...Foothills of the Northern Blue Mountains of Oregon. * WHEN...From 10 PM this evening to 7 AM PST Tuesday. * IMPACTS...Damaging winds will blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strong and damaging winds will be observed along Interstate 84 from Pendleton to Cabbage Hill, as well as Highway 11 from Pendleton to Milton-Freewater.

* WHAT...South winds 20 to 30 mph with gusts 45 to 50 mph expected, primarily at the base of the Blue Mountains. * WHERE...Foothills of the Southern Blue Mountains of Oregon. * WHEN...From 10 PM this evening to 7 AM PST Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

ESFPQR A series of systems will bring an extended period of wet weather across northwest Oregon and southwest Washington through the weekend. This will lead to rises on rivers and creeks, beginning Wednesday evening, Dec 25th through at least Sunday, December 29th. There is currently a 15-30% probability that rivers west of the Cascades reach minor flood stage over the next ten days. Heavy rainfall may also cause ponding of water or localized urban flooding, especially in low lying areas or other areas with poor drainage. This also increases the potential for landslides and debris flows. The exact track of these upcoming storms will influence rainfall amounts, and thus the potential for flooding. Shifts in 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 systems will bring an extended period of wet weather across northwest Oregon and southwest Washington through the weekend. This will lead to rises on rivers and creeks, beginning Wednesday evening, Dec 25th through at least Sunday, December 29th. There is currently a 15-30% probability that rivers west of the Cascades reach minor flood stage over the next ten days. Heavy rainfall may also cause ponding of water or localized urban flooding, especially in low lying areas or other areas with poor drainage. This also increases the potential for landslides and debris flows. The exact track of these upcoming storms will influence rainfall amounts, and thus the potential for flooding. Shifts in 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...Southeast winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...East Puget Sound Lowlands. * WHEN...Until 2 AM PST Tuesday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Winds will be strongest in areas near and west of the Cascade gaps including North Bend, Enumclaw, Gold Bar, and Covington.

* WHAT...Large breaking waves of 18 to 22 feet in the surf zone. * WHERE...North Coast and Central Coast zones. * WHEN...Until 1 PM PST Tuesday. * 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 will be long period with a dominant period of 20 to 22 seconds. This will enhance the risk for beach erosion and infrastructure damage on west or southwest facing beaches.

* WHAT...Large waves and dangerous surf conditions. Breakers up to 30 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...From 5 AM to 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. Similar wave conditions in the past have resulted in beach erosion and damage to coastal properties and buildings. High water run-up is expected on beaches and low- lying shoreline. * ADDITIONAL DETAILS...There is a high threat for sneaker waves.

* WHAT...Large waves and dangerous surf conditions. Breakers up to 30 feet. * WHERE...North and Central Coast of Oregon, and South Washington Coast. * WHEN...From 5 AM to 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. Similar wave conditions in the past have resulted in beach erosion and damage to coastal properties and buildings. High water run-up is expected on beaches and low- lying shoreline. * ADDITIONAL DETAILS...There is a high threat 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 this evening 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...Southeast winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...For the Wind Advisory, southern Rogue Valley, including the city of Ashland, Talent and Phoenix. * WHEN...Until 8 PM PST this evening. * IMPACTS...Gusty winds will blow around unsecured objects this afternoon and evening. Tree limbs could be blown down and a few power outages may result.

* WHAT...Heavy snow possible at or above elevations greater than 3500 ft. Total snow accumulations between 18 to 24 inches possible. Winds could gust as high as 45 mph. * WHERE...Cascades of Whatcom and Skagit Counties, including Mt. Baker Ski Area, Cascades of King and Snohomish Counties, including Stevens Pass, and Cascades of Pierce and Lewis Counties, including Paradise, Crystal Mountain Ski Area, and White Pass. * WHEN...From Wednesday afternoon through Friday morning. * IMPACTS...Roads will likely become slick and hazardous. Visibilities may be reduced due to falling and blowing snow. * ADDITIONAL DETAILS...Accumulations of 6 to 12 inches will be possible for elevations between 3000 to 3500 feet, including Snoqualmie Pass.

* WHAT...Heavy snow possible at or above elevations greater than 4000 ft. Total snow accumulations between 18 to 24 inches possible. Winds could gust as high as 45 mph. * WHERE...Olympic Mountains including Hurricane Ridge. * WHEN...From Wednesday afternoon through Friday morning. * IMPACTS...Roads will likely become slick and hazardous. Visibilities may be reduced due to falling and blowing snow.