Current Watches, Warnings and Advisories for Oregon Issued by the National Weather Service - Last Update: Saturday 20th of October 2018 04:30:00 AM            Dense Fog Advisory issued October 20 at 4:30AM PDT until October 20 at 10:00AM PDT by NWS            ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM PDT THIS MORNING... The National Weather Service in Portland has issued a Dense Fog Advisory, which is in effect until 10 AM PDT this morning. * VISIBILITIES...1/4 mile or less at times. * TIMING...Through 10 AM. * IMPACTS...Expect abrupt changes in visibilities over short - Last Update: Friday 19th of October 2018 09:27:00 AM            Air Stagnation Advisory issued October 19 at 9:27AM PDT until October 23 at 10:00AM PDT by NWS            ...STAGNANT AIR CONDITIONS EXPECTED... ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... * AIR QUALITY...Moderate to unhealthy at times. * IMPACTS...Stagnant air, along with smoke and other pollutants, will lead to poor air quality through early next week.            Current Watches, Warnings and Advisories for Washington Issued by the National Weather Service - Last Update: Friday 19th of October 2018 09:44:00 AM            Air Stagnation Advisory issued October 19 at 9:44AM PDT until October 23 at 10:00AM PDT by NWS            ...STAGNANT AIR CONDITIONS EXPECTED... .A strong ridge of high pressure over the region will result in poor mixing and light winds through early next week. Pollutants are expected to build near the surface with a degradation of air quality during this period. ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT - Last Update: Friday 19th of October 2018 09:44:00 AM            Air Stagnation Advisory issued October 19 at 9:44AM PDT until October 23 at 10:00AM PDT by NWS            ...STAGNANT AIR CONDITIONS EXPECTED... .A strong ridge of high pressure over the region will result in poor mixing and light winds through early next week. Pollutants are expected to build near the surface with a degradation of air quality during this period. ...AIR STAGNATION ADVISORY IN EFFECT UNTIL 10 AM PDT TUESDAY... - Last Update: Friday 19th of October 2018 09:27:00 AM            Air Stagnation Advisory issued October 19 at 9:27AM PDT until October 23 at 10:00AM PDT by NWS            ...STAGNANT AIR CONDITIONS EXPECTED... ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... * AIR QUALITY...Moderate to unhealthy at times. * IMPACTS...Stagnant air, along with smoke and other pollutants, will lead to poor air quality through early next week.