Aggregator

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark County Lowlands. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Central Willamette Valley. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Portland West Hills and Chehalem Mountain. * WHEN...Until 4 PM PST Monday. * 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, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark County Lowlands. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Central Willamette Valley. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley.

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Yakima Valley, Lower Columbia Basin of Washington, and Foothills of the Blue Mountains of Washington. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Foothills of the Northern Blue Mountains of Oregon and Lower Columbia Basin of Oregon. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley, Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * 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, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Central Willamette Valley. * WHEN...For the Dense Fog Advisory, until 10 AM PST Thursday. For the Air Stagnation Advisory, until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley, Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * 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, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Central Willamette Valley. * WHEN...For the Dense Fog Advisory, until 10 AM PST Thursday. For the Air Stagnation Advisory, until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Foothills of the Blue Mountains of Washington. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Yakima Valley and Lower Columbia Basin of Washington. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface 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, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface 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, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.