* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Foothills of the Northern and Central Oregon Cascades, and
South Washington Cascade Foothills.
* WHEN...Until 4 PM PST Tuesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Air Stagnation Advisory, a persistent inversion
with light and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...South Willamette Valley, and Central Oregon Coast Range
Lowlands.
* WHEN...Until 4 PM PST Tuesday.
* 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, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Lower Columbia River and Cowlitz River Valleys, North
Oregon Coast Range Lowlands, Tualatin Valley, Willapa and
Wahkiakum Lowlands, and North Clark County Lowlands.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Portland West Hills and Chehalem Mountain.
* WHEN...Until 4 PM PST Monday.
* 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, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro,
and Inner Vancouver Metro.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For
the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Poor 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, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Lower Columbia River and Cowlitz River Valleys, North
Oregon Coast Range Lowlands, Tualatin Valley, Willapa and
Wahkiakum Lowlands, and North Clark County Lowlands.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Poor 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, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro,
and Inner Vancouver Metro.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For
the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Poor 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, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Central Willamette Valley.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Foothills of the Northern and Central Oregon Cascades, and
South Washington Cascade Foothills.
* WHEN...Until 4 PM PST Tuesday.
* 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, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...South Willamette Valley, North and Central Coast Range
Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys,
Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark
County Lowlands.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous. Watch fog spotty freezing fog and slick roads,
especially rural areas of the Willamette Valley.
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Central Willamette Valley.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous. Watch fog spotty freezing fog and slick roads,
especially rural areas.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Portland West Hills and Chehalem Mountain.
* WHEN...Until 4 PM PST Monday.
* 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, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro,
and Inner Vancouver Metro.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For
the Dense Fog Advisory, until 11 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Watch fog spotty freezing fog and slick roads, especially rural
areas of the Willamette Valley.
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...South Willamette Valley, North and Central Coast Range
Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys,
Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark
County Lowlands.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous. Watch fog spotty freezing fog and slick roads,
especially rural areas of the Willamette Valley.
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Central Willamette Valley.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous. Watch fog spotty freezing fog and slick roads,
especially rural areas.
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog, and freezing fog in spots across rural areas.
or the Air Stagnation Advisory, a persistent inversion with light
and variable winds will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants near the surface over time.
* WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro,
and Inner Vancouver Metro.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For
the Dense Fog Advisory, until 11 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Watch fog spotty freezing fog and slick roads, especially rural
areas of the Willamette Valley.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Foothills of the Northern Blue Mountains of Oregon and
Lower Columbia Basin of Oregon.
* WHEN...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, a persistent
inversion with light and variable winds will lead to a period of
stagnant air conditions. This scenario could result in the build
up of air pollutants near the surface over time.
* WHERE...Central Willamette Valley.
* WHEN...For the Dense Fog Advisory, until 10 AM PST Thursday. For
the Air Stagnation Advisory, until 4 PM PST Tuesday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems. Low visibility could make driving
conditions hazardous.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...South Willamette Valley, 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, Willapa and Wahkiakum Lowlands, North Clark County
Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 4 PM PST Tuesday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and
Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro.
* WHEN...Until 4 PM PST Monday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
