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...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, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Thursday. * 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 Air Stagnation Advisory, until 4 AM PST Thursday. For the Dense Fog Advisory, until 11 AM PST this morning. * 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 Air Stagnation Advisory, until 4 AM PST Thursday. For the Dense Fog Advisory, until 11 AM PST this morning. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

* 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. For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. * WHERE...Central Willamette Valley. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Thursday. For the Dense Fog Advisory, until 11 AM PST this morning. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.

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...Areas of visibility one quarter mile or less in dense fog. * WHERE...Portions of northwest and west central Washington. * WHEN...Until 10 AM PST this morning. * IMPACTS...Areas of low visibility could make driving conditions hazardous.

Areas of dense fog will impact mainly parts of Clackamas County in the Portland metro area overnight into early Monday morning. This includes Milwaukie, Lake Oswego, Oregon City, and Happy Valley. Visibility will be reduced to one quarter mile or less at times, and low visibility could make driving conditions hazardous in these locations. Locations within the City of Portland and Multnomah County will mostly remain clear due to east winds out of the Columbia River Gorge. If you encounter dense fog while driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.

* WHAT...For the Cold Weather Advisory, very cold temperatures as low as 18 degrees expected. A ridge of high pressure will lead to a strong inversion and stagnant air conditions near the surface that will continue to trap pollutants. This could worsen air quality over time. * WHERE...For the Cold Weather Advisory, the southern end of the Rogue Valley including Ashland as well as the outskirts of Phoenix and Talent; the Shady Cove area; areas east of Eagle Point and White City on Highway 140; and portions of the Applegate Valley including the outskirts of Ruch, Applegate, and Jacksonville Hill. For the Air Stagnation Advisory, the Rogue, Applegate and Sams valleys in Jackson County, including Medford, Talent, Phoenix, Eagle Point, Central Point, Jacksonville, Applegate and Shady Cove. * WHEN...For the Cold Weather Advisory, from 2 AM to 8 AM PST Monday. For the Air Stagnation Advisory, until 4 PM PST Wednesday. * IMPACTS...Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures, especially for longer periods of time. Poor air quality may cause issues for people with respiratory problems.

* WHAT...A ridge of high pressure will lead to a strong inversion and stagnant air conditions near the surface that will continue to trap pollutants. This could worsen air quality over time. * WHERE...Valley locations across southern Oregon. West of the Cascades, this includes the Umpqua, Illinois, Applegate, and Rogue valleys, including Grants Pass, Sunny Valley, Galice, Murphy, Selma, Cave Junction and O'Briend. East of the Cascades, this includes Klamath Falls, Sprague River, Chiloquin, Chemult, Silver Lake, Paisley, and surrounding areas. * WHEN...Until 4 PM PST Wednesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...Temperatures of 33 to 36 will result in frost formation. * WHERE...South Central Oregon Coast, including all coastal areas from Port Orford north to around Reedsport as well as the Coquille Valley. * WHEN...From 9 PM this evening to 9 AM PST Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...A few of the typically colder locations could fall to freezing.

* WHAT...For the Cold Weather Advisory, very cold temperatures as low as 18 degrees expected. A ridge of high pressure will lead to a strong inversion and stagnant air conditions near the surface that will continue to trap pollutants. This could worsen air quality over time. * WHERE...For the Cold Weather Advisory, the southern end of the Rogue Valley including Ashland as well as the outskirts of Phoenix and Talent; the Shady Cove area; areas east of Eagle Point and White City on Highway 140; and portions of the Applegate Valley including the outskirts of Ruch, Applegate, and Jacksonville Hill. For the Air Stagnation Advisory, the Rogue, Applegate and Sams valleys in Jackson County, including Medford, Talent, Phoenix, Eagle Point, Central Point, Jacksonville, Applegate and Shady Cove. * WHEN...For the Cold Weather Advisory, from 2 AM to 8 AM PST Monday. For the Air Stagnation Advisory, until 4 PM PST Wednesday. * IMPACTS...Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures, especially for longer periods of time. Poor air quality may cause issues for people with respiratory problems.

* WHAT...Poor air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Kittitas Valley and Yakima Valley. * WHEN...Until 4 AM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...Visibility less than half a mile in freezing fog with some locally dense freezing fog with less than one quarter of a mile visibility. * WHERE...Central Oregon mainly in areas north of Bend, Foothills of the Southern Blue Mountains of Oregon, and North Central Oregon. * WHEN...Until 11 AM PST Monday. * IMPACTS...Low visibility could make driving conditions hazardous. The freezing fog can also cause slick conditions on roads, especially on bridges and overpasses.

The highest risk for sneaker waves has passed, and the risk will continue to diminish to low levels tonight. Therefore, the beach hazards statement will be allowed to expire.

* 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, Tualatin Valley, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Thursday. * 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 Thursday. * 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, Tualatin Valley, Outer Southeast Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 AM PST Thursday. * 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. For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. * WHERE...Central Willamette Valley. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Thursday. For the Dense Fog Advisory, until 11 AM PST Monday. * 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 11 AM PST Monday. For the Air Stagnation Advisory, until 4 AM PST Thursday. * 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 11 AM PST Monday. For the Air Stagnation Advisory, until 4 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.