* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Lake County and eastern Klamath County, and Klamath Basin.
This includes the cities of Klamath Falls and Lakeview.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...For the Air Stagnation Advisory, Central Douglas County,
Eastern Curry County and Josephine County, and Jackson County.
This includes the cities of Roseburg, Grants Pass, Cave Junction
and Medford.
* WHEN...Until noon PST Friday.
* IMPACTS...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...Eastern Douglas County Foothills, including Steamboat.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
Patchy dense freezing fog has developed along the Highway 97
corridor south of Bend, as visibilities of one quarter of a mile
or less have been observed on area webcams and local weather
stations. Fog is expected to persist through the morning, likely
dissipating around 11 AM. motorists are urged to use caution as
visibilities may vary or change drastically, and roadways may be
slick due to ice depositing on the road surface.
* WHAT...West winds 20 to 30 mph with gusts up to 50 mph expected.
* WHERE...Foothills of the Blue Mountains of Oregon.
* WHEN...From 4 PM Friday to 1 AM PST Saturday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected.
* WHERE...Grande Ronde Valley.
* WHEN...From 1 AM to 1 PM PST Friday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Central Oregon and North Central Oregon.
* WHEN...Until 11 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Lane County Lowlands.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Lake County and eastern Klamath County, and Klamath Basin.
This includes the cities of Klamath Falls and Lakeview.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor 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, 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...For the Dense Fog Advisory, Central Douglas County,
Josephine County, and Jackson County. For the Air Stagnation
Advisory, Central Douglas County, Eastern Curry County and
Josephine County, and Jackson County. This includes the cities of
Roseburg, Grants Pass, Cave Junction and Medford.
* 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...Mixing and ventilation should be better at
the south end of the Rogue Valley from around Talent to Ashland
due to stronger SE winds.
* 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...Eastern Douglas County Foothills, including Steamboat.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor 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, 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...For the Dense Fog Advisory, Central Douglas County,
Josephine County, and Jackson County. For the Air Stagnation
Advisory, Central Douglas County, Eastern Curry County and
Josephine County, and Jackson County. This includes the cities of
Roseburg, Grants Pass, Cave Junction and Medford.
* 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...Mixing and ventilation should be better at
the south end of the Rogue Valley from around Talent to Ashland
due to stronger SE winds.
Patchy dense freezing fog has developed along the I-84 corridor,
primarily over Cabbage Hill between mileposts 220 and 240 near
Meacham. Fog may expand its footprint overnight and into the
morning hours on Thursday. Motorists are urged to use caution as
visibilities may vary or change drastically , and roadways may be
slick due to ice depositing on the road surface.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Central Oregon and North Central Oregon.
* WHEN...Until 11 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* 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 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...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Lake County and eastern Klamath County, and Klamath Basin.
This includes the cities of Klamath Falls and Lakeview.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Central Douglas County, Eastern Curry County and Josephine
County, Eastern Douglas County Foothills, and Jackson County. This
includes the cities of Roseburg, Grants Pass, Cave Junction and
Medford.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* ADDITIONAL DETAILS...Mixing and ventilation should be better at
the south end of the Rogue Valley from around Talent to Ashland
due to stronger SE winds.
* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Lake County and eastern Klamath County, and Klamath Basin.
This includes the cities of Klamath Falls and Lakeview.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Central Douglas County, Eastern Curry County and Josephine
County, Eastern Douglas County Foothills, and Jackson County. This
includes the cities of Roseburg, Grants Pass, Cave Junction and
Medford.
* WHEN...Until noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* ADDITIONAL DETAILS...Mixing and ventilation should be better at
the south end of the Rogue Valley from around Talent to Ashland
due to stronger SE winds.
* 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 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.
