* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.
* WHEN...Until noon PST Friday.
* 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...Central and Southern 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...A moderate risk of sneaker waves is expected.
* WHERE...All beaches and shorelines of Douglas, Coos, and Curry
counties.
* WHEN...From Saturday evening through Sunday afternoon.
* IMPACTS...Sneaker waves can run up significantly farther on
beaches than normal, including over rocks and jetties. These
waves can suddenly knock people off of their feet and quickly
pull them into the cold ocean waters, resulting in serious
injury or death. Waves may also lift driftwood logs, trapping
anyone caught underneath.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Sub-freezing temperatures as low as 31 expected.
* WHERE...South central Oregon Coast. This includes the communities
of North Bend, Port Orford, Myrtle Point, Powers, Reedsport, and
Bandon.
* WHEN...From 2 AM to 9 AM PST Friday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that could trap pollutants in valleys.
* WHERE...Portions of south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...From 9 PM MST /8 PM PST/ this evening to 9 PM MST /8 PM
PST/ Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* ADDITIONAL DETAILS...The advisory continues through the long-term
forecast, and may be extended if conditions continue.
* WHAT...Visibility less than one mile in freezing fog.
* WHERE...Lower Columbia Basin of Oregon and Washington, Yakima
Valley, and Foothills of the Blue Mountains of Washington.
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Sub-freezing temperatures as low as 30 expected.
* WHERE...South Central Oregon Coast. This includes the communities
of North Bend, Port Orford, Myrtle Point, Powers, Reedsport, and
Bandon.
* WHEN...From 2 AM to 9 AM PST Friday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* 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, Central Oregon Coast Range 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...Lower Columbia River and Cowlitz River Valleys, North
Oregon Coast Range Lowlands, Tualatin Valley, Willapa and
Wahkiakum Lowlands, and North Clark County Lowlands.
* WHEN...Until 4 PM PST Tuesday.
* 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, and freezing fog in spots across rural areas.
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 Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
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...Portland West Hills and Chehalem Mountain.
* WHEN...Until 4 PM PST Monday.
* 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, 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...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog, and freezing fog in spots across rural areas.
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 Air Stagnation Advisory, until 4 PM PST Tuesday.
For the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
Deteriorating air quality may cause issues for people with
respiratory problems.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Lower Columbia Basin of Oregon and Washington, Yakima
Valley, and Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...A moderate risk of sneaker waves is expected.
* WHERE...All beaches and shorelines of Douglas, Coos, and Curry
counties.
* WHEN...From Saturday evening through Sunday afternoon.
* IMPACTS...Sneaker waves can run up significantly farther on
beaches than normal, including over rocks and jetties. These
waves can suddenly knock people off of their feet and quickly
pull them into the cold ocean waters, resulting in serious
injury or death. Waves may also lift driftwood logs, trapping
anyone caught underneath.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...For the Frost Advisory, temperatures as low as 33 will
result in frost formation. For the Freeze Warning, sub-freezing
temperatures as low as 30 expected.
* WHERE...South Central Oregon Coast. This includes the communities
of North Bend, Port Orford, Myrtle Point, Powers, Reedsport, and
Bandon.
* WHEN...For the Frost Advisory, until 9 AM PST this morning. For
the Freeze Warning, from 2 AM to 9 AM PST Friday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* WHAT...For the Frost Advisory, temperatures as low as 33 will
result in frost formation. For the Freeze Warning, sub-freezing
temperatures as low as 30 expected.
* WHERE...South Central Oregon Coast. This includes the communities
of North Bend, Port Orford, Myrtle Point, Powers, Reedsport, and
Bandon.
* WHEN...For the Frost Advisory, until 9 AM PST this morning. For
the Freeze Warning, from 2 AM to 9 AM PST Friday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* 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.
