Aggregator

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest Washington, including the following county, Mason. * WHEN...From this afternoon through Sunday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - A storm system will bring 2 to 3 inches of rain, possibly more to the Olympic mountains into Sunday morning. With snow levels above 7000 feet for the bulk of the precipitation, most of that will be rain and that could be enough to drive the Skokomish River above flood stage. The current river forecast has it cresting just below flood stage Sunday morning. - http://www.weather.gov/safety/flood

* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Inner Vancouver Metro. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...South Willamette Valley. * WHEN...For the Dense Fog Advisory, until 9 AM PST Saturday. For the Air Stagnation Advisory, until 4 AM PST Saturday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...South Willamette Valley. * WHEN...For the Dense Fog Advisory, until 9 AM PST Saturday. For the Air Stagnation Advisory, until 4 AM PST Saturday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...Snow expected above 3000 feet. Total snow accumulations 6 to 10 inches. Winds gusting as high as 40 mph. * WHERE...In Oregon, North Oregon Cascades. In Washington, South Washington Cascades. * WHEN...From 4 PM Saturday to 4 PM PST Sunday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow levels start off high Saturday morning at over 9000 ft before lowering to around 5000 ft Saturday afternoon and then down to 3000 ft Saturday night. Snow levels will then remain around 3000 ft through Sunday night. The period of heaviest snowfall is expected to occur late Saturday night through Sunday morning.

* WHAT...Snow expected above 3000 feet. Total snow accumulations 6 to 10 inches. Winds gusting as high as 40 mph. * WHERE...In Oregon, North Oregon Cascades. In Washington, South Washington Cascades. * WHEN...From 4 PM Saturday to 4 PM PST Sunday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow levels start off high Saturday morning at over 9000 ft before lowering to around 5000 ft Saturday afternoon and then down to 3000 ft Saturday night. Snow levels will then remain around 3000 ft through Sunday night. The period of heaviest snowfall is expected to occur late Saturday night through Sunday morning.

...LIGHT FREEZING RAIN, MOUNTAIN SNOW EXPECTED THIS WEEKEND... .A system moving across our region will bring areas of rain and some light freezing rain to portions of the lower slopes of the eastern Washington Cascades as well as the Kittitas Valley on Saturday. Then on Sunday, areas of moderate snowfall will begin to fall across the Washington Cascades as well as the northern Blue Mountains of both Washington and Oregon. * WHAT...Snow expected. Total snow accumulations up to 10 inches. Winds gusting as high as 40 mph. * WHERE...Upper Slopes of the Eastern Washington Cascades Crest. * WHEN...From 4 PM Saturday to 4 PM PST Sunday. * IMPACTS...Periods of moderate and heavy snow will combine with low visibilities to create difficult driving conditions.

...LIGHT FREEZING RAIN, MOUNTAIN SNOW EXPECTED THIS WEEKEND... .A system moving across our region will bring areas of rain and some light freezing rain to portions of the lower slopes of the eastern Washington Cascades as well as the Kittitas Valley on Saturday. Then on Sunday, areas of moderate snowfall will begin to fall across the Washington Cascades as well as the northern Blue Mountains of both Washington and Oregon. * WHAT...Snow expected. Total snow accumulations of 5 to 9 inches. Winds gusting as high as 40 mph. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...From 4 PM Saturday to 4 PM PST Sunday. * IMPACTS...Periods of moderate and heavy snow will combine with low visibilities to create difficult driving conditions.

...LIGHT FREEZING RAIN, MOUNTAIN SNOW EXPECTED THIS WEEKEND... .A system moving across our region will bring areas of rain and some light freezing rain to portions of the lower slopes of the eastern Washington Cascades as well as the Kittitas Valley on Saturday. Then on Sunday, areas of moderate snowfall will begin to fall across the Washington Cascades as well as the northern Blue Mountains of both Washington and Oregon. * WHAT...Freezing rain expected. Total ice accumulations around a light glaze. * WHERE...Kittitas Valley and Lower Slopes of the Eastern Washington Cascades Crest. * WHEN...From 4 AM to 4 PM PST Saturday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

...LIGHT FREEZING RAIN, MOUNTAIN SNOW EXPECTED THIS WEEKEND... .A system moving across our region will bring areas of rain and some light freezing rain to portions of the lower slopes of the eastern Washington Cascades as well as the Kittitas Valley on Saturday. Then on Sunday, areas of moderate snowfall will begin to fall across the Washington Cascades as well as the northern Blue Mountains of both Washington and Oregon. * WHAT...Snow expected. Total snow accumulations of 5 to 9 inches. Winds gusting as high as 40 mph. * WHERE...In Oregon, Northern Blue Mountains of Oregon. In Washington, Northwest Blue Mountains. * WHEN...From 4 PM Saturday to 4 PM PST Sunday. * IMPACTS...Periods of moderate and heavy snow will combine with low visibilities to create difficult driving conditions.

* WHAT...Heavy snow expected at or above elevations greater than 3000 ft. Total snow accumulations between 9 and 14 inches. Winds gusting as high as 40 mph. * WHERE...West Slopes North Cascades and Passes and West Slopes North Central Cascades and Passes. * WHEN...From 4 PM Saturday to 4 PM PST Sunday. * IMPACTS...Travel could be very difficult to impossible. * ADDITIONAL DETAILS...Expect 6 to 10 inches of snow at Snoqualmie Pass as temperatures will not fall below freezing until later Sunday morning.

* WHAT...Snow expected at or above elevations greater than 3000 ft. Total snow accumulations between 6 to 10 inches. Winds gusting as high as 45 mph. * WHERE...West Slopes South Central Cascades and Passes. * WHEN...From 4 PM Saturday to 4 PM PST Sunday. * IMPACTS...Plan on slippery road conditions.

* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Inner Vancouver Metro. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...South Willamette Valley. * WHEN...For the Dense Fog Advisory, until 9 AM PST Sunday. For the Air Stagnation Advisory, until 4 AM PST Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Fog will gradually thin Saturday morning, with improving visibility after 8 am.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...South Willamette Valley. * WHEN...For the Dense Fog Advisory, until 9 AM PST Sunday. For the Air Stagnation Advisory, until 4 AM PST Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Fog will gradually thin Saturday morning, with improving visibility after 8 am.

* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Central Willamette Valley, Tualatin Valley, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...South winds 25 to 35 mph with gusts up to 50 mph expected for Ladd and Pyles Canyons. * WHERE...Grande Ronde Valley. * WHEN...From 6 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.