Aggregator

* WHAT...Moderate air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys across Lake County and eastern Klamath County, South Central Oregon Coast, Eastern Douglas County Foothills, and Klamath Basin. * WHEN...Until noon PST Friday. * IMPACTS...Moderate air quality may cause issues for people with respiratory problems.

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in freezing fog and fog. For the Air Stagnation Advisory, 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...Valleys in eastern Curry County and Josephine County and Jackson County. This includes, the Illinois, Rogue and Applegate valleys, including Grants Pass, Selma, Cave Junction, Applegate, Rogue River, Medford, Eagle Point, Jacksonville, Ashland and surrounding areas. * WHEN...For the Air Stagnation Advisory, until noon PST Friday. For the Freezing Fog Advisory, until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Freezing fog may allow spots of ice to develop on roadways. Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Strong valley inversions, very shallow mixing layers of less than 1000 feet, and calm winds are expected throughout the advisory time, especially during the overnight and morning hours. A weak front Thursday night into Friday may allow for a brief period of improved mixing and particulate dispersion.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, moderate air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys in central Douglas County. This includes Roseburg, Sutherlin, Elkton, Camas Valley, Canyonville, Glendale and surrounding areas. * WHEN...For the Air Stagnation Advisory, until noon PST Friday. For the Dense Fog Advisory, until 10 AM PST this morning. * IMPACTS...Moderate air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Strong valley inversions, very shallow mixing layers of less than 1000 feet, and calm winds are expected throughout the advisory time, especially during the overnight and morning hours. A weak front Thursday night into Friday may allow for a brief period of improved mixing and particulate dispersion.

* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...Until 11 AM MST /10 AM PST/ Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in freezing fog and fog. For the Air Stagnation Advisory, 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...Valleys in eastern Curry County and Josephine County and Jackson County. This includes, the Illinois, Rogue and Applegate valleys, including Grants Pass, Selma, Cave Junction, Applegate, Rogue River, Medford, Eagle Point, Jacksonville, Ashland and surrounding areas. * WHEN...For the Freezing Fog Advisory, until 10 AM PST this morning. For the Air Stagnation Advisory, until noon PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. Freezing fog may allow spots of ice to develop on roadways. Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Strong valley inversions, very shallow mixing layers of less than 1000 feet, and calm winds are expected throughout the advisory time, especially during the overnight and morning hours. A weak front Thursday night into Friday may allow for a brief period of improved mixing and particulate dispersion.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, moderate air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys in central Douglas County. This includes Roseburg, Sutherlin, Elkton, Camas Valley, Canyonville, Glendale and surrounding areas. * WHEN...For the Dense Fog Advisory, until 10 AM PST this morning. For the Air Stagnation Advisory, until noon PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Strong valley inversions, very shallow mixing layers of less than 1000 feet, and calm winds are expected throughout the advisory time, especially during the overnight and morning hours. A weak front Thursday night into Friday may allow for a brief period of improved mixing and particulate dispersion.

* WHAT...Moderate air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys across Lake County and eastern Klamath County, South Central Oregon Coast, Eastern Douglas County Foothills, and Klamath Basin. * WHEN...Until noon PST Friday. * IMPACTS...Moderate 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, moderate air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Valleys in central Douglas County. This includes Roseburg, Sutherlin, Elkton, Camas Valley, Canyonville, Glendale and surrounding areas. * WHEN...For the Dense Fog Advisory, until 10 AM PST this morning. For the Air Stagnation Advisory, until noon PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Strong valley inversions, very shallow mixing layers of less than 1000 feet, and calm winds are expected throughout the advisory time, especially during the overnight and morning hours. A weak front Thursday night into Friday may allow for a brief period of improved mixing and particulate dispersion.

* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in freezing fog and fog. For the Air Stagnation Advisory, 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...Valleys in eastern Curry County and Josephine County and Jackson County. This includes, the Illinois, Rogue and Applegate valleys, including Grants Pass, Selma, Cave Junction, Applegate, Rogue River, Medford, Eagle Point, Jacksonville, Ashland and surrounding areas. * WHEN...For the Freezing Fog Advisory, until 10 AM PST this morning. For the Air Stagnation Advisory, until noon PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. Freezing fog may allow spots of ice to develop on roadways. Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...Strong valley inversions, very shallow mixing layers of less than 1000 feet, and calm winds are expected throughout the advisory time, especially during the overnight and morning hours. A weak front Thursday night into Friday may allow for a brief period of improved mixing and particulate dispersion.

Patchy dense freezing fog will continue into late evening hours across the Blue Mountain Foothills of WA and OR. Visibilities of less than 1/2 mile are possible in spots, especially along Highway 11 near Athena, Interstate 84 near Pendleton and in portions of Walla Walla. Drivers should expect sudden reductions in visibility. Slow down and allow for extra space between yourself and other vehicles if you encounter dense fog.

Patchy dense freezing fog will continue into late evening hours across the Blue Mountain Foothills of WA and OR. Visibilities of less than 1/2 mile are possible in spots, especially along Highway 11 near Athena, Interstate 84 near Pendleton and in portions of Walla Walla. Drivers should expect sudden reductions in visibility. Slow down and allow for extra space between yourself and other vehicles if you encounter dense fog.

Patchy dense freezing fog will continue into late evening hours across the Blue Mountain Foothills of WA and OR. Visibilities of less than 1/2 mile are possible in spots, especially along Highway 11 near Athena, Interstate 84 near Pendleton and in portions of Walla Walla. Drivers should expect sudden reductions in visibility. Slow down and allow for extra space between yourself and other vehicles if you encounter dense fog.

Patchy dense freezing fog will continue into late evening hours across the Blue Mountain Foothills of WA and OR. Visibilities of less than 1/2 mile are possible in spots, especially along Highway 11 near Athena, Interstate 84 near Pendleton and in portions of Walla Walla. Drivers should expect sudden reductions in visibility. Slow down and allow for extra space between yourself and other vehicles if you encounter dense fog.

* 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. * WHERE...South Willamette Valley. * WHEN...Until 10 AM PST Thursday. * IMPACTS...For the Dense Fog Advisory, low visibility could make driving conditions hazardous. For the Air Stagnation Advisory, 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. * WHERE...South Willamette Valley. * WHEN...Until 10 AM PST Thursday. * IMPACTS...For the Dense Fog Advisory, low visibility could make driving conditions hazardous. For the Air Stagnation Advisory, Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Lane County Cascade Foothills. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

* WHAT...Light winds and limited air movement will lead to a period of stagnant air conditions. * WHERE...Central Willamette Valley. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Quincy, Harrington, Grand Coulee, Ritzville, Ephrata, Moses Lake, Creston, Wilbur, Othello, Odessa, and Coulee City. * WHEN...Until 8 AM PST Thursday. * IMPACTS...Low visibility will make driving conditions hazardous. Freezing temperatures could lead to slick conditions on untreated roadways. * ADDITIONAL DETAILS...Spotters have reported visibility as low as 1/8 mile near Moses Lake and Warden.

* WHAT...Moderate to poor air quality will continue through the next few days. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...The valleys of Klamath, Lake, Jackson, Josephine and Douglas Counties. This includes the Klamath Basin and the Rogue, Illinois, Umpqua, Goose, Summer Lake and Applegate valleys. * WHEN...Until noon PST Friday. * IMPACTS...Poor and unhealthy air quality may cause issues for people with respiratory problems. * ADDITIONAL DETAILS...A dry cold front on Thursday night and Friday morning will improve mixing conditions.

Patchy dense freezing fog will continue into early evening hours across the Blue Mountain Foothills. Visibilities of less than 1/2 mile are possible in spots, especially along Highway 11 near Weston, Interstate 84 near Pendleton and in portions of Walla Walla. Drivers should expect sudden reductions in visibility. Slow down and allow for extra space between yourself and other vehicles if you encounter dense fog.