* 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...Visibility around one-quarter mile or less in dense fog.
* WHERE...Hood Canal Area, Bremerton and Vicinity, Seattle and
Vicinity, Southwest Interior, and Tacoma Area.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...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...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...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...Yakima Valley, Lower Columbia Basin of Washington, and
Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...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.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Yakima Valley and Lower Columbia Basin of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...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,
North and Central Coast Range Valleys of Oregon, Lower Columbia
River and Cowlitz River Valleys, Central Willamette Valley,
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.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Yakima Valley and Lower Columbia Basin of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Multiple observations along I-82 between
Richland and Yakima are currently showing visibilities of less
than a quarter mile, which is expected to persist this evening and
into Thursday morning. Air Temperatures are currently 32-34 in the
area, but are anticipated to drop to between 25-30 degrees
overnight.
* 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,
North and Central Coast Range Valleys of Oregon, Lower Columbia
River and Cowlitz River Valleys, Central Willamette Valley,
Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark
County Lowlands, and South Washington Cascade Foothills.
* WHEN...From 4 PM this afternoon to 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...From 4 PM this afternoon to 4 PM PST Monday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Yakima Valley.
* WHEN...Until 9 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
Patchy dense fog with visibility of a quarter mile or less has
been observed in the Kittitas Valley this morning. Be cautious
when traveling and be prepared for sudden changes of visibility.
Fog is expected to persist for the next couple of hours.
