* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions.
* WHERE...Lane County Lowlands.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* 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...Lake County and eastern Klamath County, South Central
Oregon Coast, Eastern Douglas County Foothills, and Klamath Basin.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Moderate air quality may cause issues for people with
respiratory problems.
* WHAT...The dense fog is thinning out. 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 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...Until 10 AM PST Thursday.
* IMPACTS...Moderate air quality may cause issues for people with
respiratory problems.
* WHAT...The dense fog is thinning out. 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...Until 10 AM PST Thursday.
* IMPACTS...Moderate air quality may cause issues for people with
respiratory problems.
Patchy dense freezing fog has been observed across north central
Oregon as well as the Lower Columbia Basin of Oregon and the Blue
Mountain Foothills. The visibility is less than one half mile in
places. This includes Highway 11 near Weston, Interstate 84
between Pendleton and Hermiston and 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 has been observed across north central
Oregon as well as the Lower Columbia Basin of Oregon and the Blue
Mountain Foothills. The visibility is less than one half mile in
places. This includes Highway 11 near Weston, Interstate 84
between Pendleton and Hermiston. 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 of less than a
quarter of a mile in dense 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 central Douglas County. This includes Roseburg,
Sutherlin, Elkton, Camas Valley, Canyonville, Glendale and
surrounding areas.
* WHEN...For the Dense Fog Advisory, until noon PST today. For the
Air Stagnation Advisory, until 10 AM PST Thursday.
* 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 on Thursday may allow for a brief
period of improved mixing and particulate dispersion.
* WHAT...For the Freezing Fog Advisory, visibility of less than a
quarter of mile in freezing 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 noon PST today. For
the Air Stagnation Advisory, until 10 AM PST Thursday.
* 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 on Thursday may allow for a brief
period of improved mixing and particulate dispersion.
* 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...Lake County and eastern Klamath County, South Central
Oregon Coast, Eastern Douglas County Foothills, and Klamath Basin.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Freezing Fog Advisory, visibility of less than a
quarter of mile in freezing 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 noon PST today. For
the Air Stagnation Advisory, until 10 AM PST Thursday.
* 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 on Thursday may allow for a brief
period of improved mixing and particulate dispersion.
* WHAT...For the Dense Fog Advisory, visibility of less than a
quarter of a mile in dense 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 central Douglas County. This includes Roseburg,
Sutherlin, Elkton, Camas Valley, Canyonville, Glendale and
surrounding areas.
* WHEN...For the Dense Fog Advisory, until noon PST today. For the
Air Stagnation Advisory, until 10 AM PST Thursday.
* 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 on Thursday may allow for a brief
period of improved mixing and particulate dispersion.
* WHAT...Light winds and limited air movements will lead to a period
of stagnant air conditions.
* WHERE...Central Willamette Valley, Benton County Lowlands, and
Linn County Lowlands.
* WHEN...Until 10 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 movements will lead to a period of stagnant air
conditions.
* WHERE...Lane County Lowlands.
* WHEN...For the Dense Fog Advisory, until noon PST today. For the
Air Stagnation Advisory, until 10 AM PST Thursday.
* IMPACTS...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 movements will lead to a period of stagnant air
conditions.
* WHERE...Lane County Lowlands.
* WHEN...For the Dense Fog Advisory, until noon PST today. For the
Air Stagnation Advisory, until 10 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Portland Metro Lowlands, Greater Vancouver Metro, and
Portland West Hills and Chehalem Mountain.
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
Patchy dense freezing fog has been observed across north central
Oregon as well as the Lower Columbia Basin of Oregon and the Blue
Mountain Foothills. The visibility is less than one half mile in
places. This includes Highway 11 near Weston, Interstate 84 in
Hermiston, and Highways 97 and 197 north of Madras. Drivers
should expect a sudden reduction in visibility as well as black
ice on the roadways.
* WHAT...Light winds and limited air movements will lead to a period
of stagnant air conditions.
* WHERE...Central and Southern Willamette Valley.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
Patchy dense freezing fog has been observed across north central
Oregon as well as the Lower Columbia Basin of Oregon and the Blue
Mountain Foothills. The visibility is less than one half mile in
places. This includes Highway 11 near Weston, Interstate 84 in
Hermiston, and Highways 97 and 197 north of Madras. Drivers
should expect a sudden reduction in visibility as well as black
ice on the roadways.
* 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. 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 10 AM PST Thursday.
* 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 on Thursday may allow for a brief
period of improved mixing and particulate dispersion.
