Aggregator

* 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 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...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, Outer Southeast Portland Metro, West Central Willamette Valley, 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...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...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, Outer Southeast Portland Metro, West Central Willamette Valley, 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...For the Freezing Fog Advisory, visibility one quarter mile or less in fog and freezing 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 Air Stagnation Advisory, until 4 AM PST Saturday. For the Freezing Fog Advisory, until 11 AM PST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. With temperatures at or just below freezing, fog droplets may freeze on contact with surfaces, with slick spots on roadways possible overnight into early Thursday.

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in fog and freezing 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...East Central Willamette Valley. * WHEN...For the Freezing Fog Advisory, until 11 AM PST this morning. 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. With temperatures at or just below freezing, fog droplets may freeze on contact with surfaces, with slick spots on roadways possible overnight into early Thursday.

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in fog and freezing 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 Air Stagnation Advisory, until 4 AM PST Saturday. For the Freezing Fog Advisory, until 11 AM PST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. With temperatures at or just below freezing, fog droplets may freeze on contact with surfaces, with slick spots on roadways possible overnight into early Thursday.

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in fog and freezing 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...East Central Willamette Valley. * WHEN...For the Freezing Fog Advisory, until 11 AM PST this morning. 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. With temperatures at or just below freezing, fog droplets may freeze on contact with surfaces, with slick spots on roadways possible overnight into early Thursday.

Dense freezing fog has formed along Interstate 84 east of Pendleton on Cabbage Hill, with visibilities less than one quarter mile. Motorists are urged to use caution when traveling this stretch of interstate tonight and be alert for patches of ice on the roadways.

* 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...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...For the Freezing Fog Advisory, visibility one quarter mile or less in fog and freezing 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 Air Stagnation Advisory, until 4 AM PST Saturday. For the Freezing 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. With temperatures at or just below freezing, fog droplets may freeze on contact with surfaces, with slick spots on roadways possible overnight into early Thursday.

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in fog and freezing 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 Air Stagnation Advisory, until 4 AM PST Saturday. For the Freezing 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. With temperatures at or just below freezing, fog droplets may freeze on contact with surfaces, with slick spots on roadways possible overnight into early Thursday.

* WHAT...Valley locations may see poor air quality. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys in central and northern Lake County and Klamath County. This includes Klamath Falls, Sprague River, Chiloquin, Chemult, Silver Lake, Paisley and surrounding areas. * WHEN...Until 4 AM PST Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...Valley locations may see poor air quality. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys in Douglas, Josephine, and Jackson County. This includes the Umpqua, Illinois, Applegate, and Rogue valleys. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Saturday. For the Dense Fog Advisory, until 1 PM PST Thursday. * IMPACTS...Poor 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 dense fog. * WHERE...Curry County Coast and South Central Oregon Coast. * WHEN...Until 1 PM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Valley locations may see poor air quality. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys in Douglas, Josephine, and Jackson County. This includes the Umpqua, Illinois, Applegate, and Rogue valleys. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Saturday. For the Dense Fog Advisory, until 1 PM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* WHAT...Visibility one quarter to one half mile in areas of dense fog and localized freezing fog. * WHERE...Admiralty Inlet Area, Hood Canal Area, Western Skagit County, Western Whatcom County, Bremerton and Vicinity, Everett and Vicinity, Seattle and Vicinity, Southwest Interior, and Tacoma Area. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Areas of low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Areas of sub-freezing temperatures into Thursday morning may cause localized freezing fog.

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Central Oregon. * WHEN...Until 11 AM PST Thursday. * IMPACTS...Low visibility and slick roads could make driving conditions hazardous.

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Foothills of the Southern Blue Mountains of Oregon and North Central Oregon. * WHEN...Until 11 AM PST Thursday. * IMPACTS...Low visibility and slick roads could make driving conditions hazardous.