* WHAT...Visibility less than half a mile in freezing fog with some
locally dense freezing fog with less than one quarter of a mile
visibility.
* WHERE...Central Oregon mainly in areas north of Bend, Foothills of
the Southern Blue Mountains of Oregon, and North Central Oregon.
* WHEN...Until 11 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
The freezing fog can also cause slick conditions on roads,
especially on bridges and overpasses.
The highest risk for sneaker waves has passed, and the risk will
continue to diminish to low levels tonight. Therefore, the beach
hazards statement will be allowed to expire.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants 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, Tualatin Valley, Outer Southeast
Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County
Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants over time.
* WHERE...Inner Vancouver Metro.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants 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, Tualatin Valley, Outer Southeast
Portland Metro, Willapa and Wahkiakum Lowlands, North Clark County
Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...For the Air Stagnation Advisory, Light winds and limited
air movement will lead to a period of stagnant air conditions.
This scenario could result in the build up of air pollutants over
time. For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog.
* WHERE...Central Willamette Valley.
* WHEN...For the Air Stagnation Advisory, until 4 AM PST Thursday.
For the Dense Fog Advisory, until 11 AM PST Monday.
* IMPACTS...Deteriorating 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. For the Air Stagnation Advisory, Light winds
and limited air movement will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants over time.
* WHERE...South Willamette Valley.
* WHEN...For the Dense Fog Advisory, until 11 AM PST Monday. For the
Air Stagnation Advisory, until 4 AM PST Thursday.
* IMPACTS...Deteriorating 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. For the Air Stagnation Advisory, Light winds
and limited air movement will lead to a period of stagnant air
conditions. This scenario could result in the build up of air
pollutants over time.
* WHERE...South Willamette Valley.
* WHEN...For the Dense Fog Advisory, until 11 AM PST Monday. For the
Air Stagnation Advisory, until 4 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems. Low visibility could make driving
conditions hazardous.
* WHAT...For the Air Stagnation Advisory, Light winds and limited
air movement will lead to a period of stagnant air conditions.
This scenario could result in the build up of air pollutants over
time. For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog.
* WHERE...Central Willamette Valley.
* WHEN...For the Air Stagnation Advisory, until 4 AM PST Thursday.
For the Dense Fog Advisory, until 11 AM PST Monday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems. 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 in valleys.
* WHERE...Portions of south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 9 PM MST /8 PM PST/ Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Dense Fog Advisory, visibility one to two miles in
dense fog.
For the Air Stagnation Advisory in valleys, 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...Lower Treasure Valley Zones.
* WHEN...For the Dense Fog Advisory, until 11 AM MST Monday. For the
Air Stagnation Advisory, until 9 PM MST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous especially along Interstate 84 from Fruitland, Idaho
through Huntington, Oregon.
* WHAT...For the Dense Fog Advisory, visibility one to two miles in
dense fog.
For the Air Stagnation Advisory in valleys, 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...Lower Treasure Valley Zones.
* WHEN...For the Dense Fog Advisory, until 11 AM MST Monday. For the
Air Stagnation Advisory, until 9 PM MST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous especially along Interstate 84 from Fruitland, Idaho
through Huntington, Oregon.
* 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...Kittitas Valley and Yakima Valley.
* WHEN...Until 4 AM PST Tuesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...A ridge of high pressure will lead to a strong inversion
and stagnant air conditions near the surface that will continue to
trap pollutants. This could worsen air quality over time.
* WHERE...Valley locations across southern Oregon. West of the
Cascades, this includes the Umpqua, Illinois, Applegate, and Rogue
valleys. East of the Cascades, this includes Klamath Falls,
Sprague River, Chiloquin, Chemult, Silver Lake, Paisley, and
surrounding areas.
* WHEN...Until 4 PM PST Wednesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Temperatures of 33 to 36 will result in frost formation.
* WHERE...South Central Oregon Coast, including all coastal areas
from Port Orford north to around Reedsport as well as the Coquille
Valley.
* WHEN...From 9 PM this evening to 9 AM PST Monday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* ADDITIONAL DETAILS...A few of the typically colder locations could
fall to freezing.
* WHAT...Dense fog has decreased this afternoon, but areas of
lighter fog will continue through the afternoon and evening, then
become dense again late tonight and Monday.
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 in valleys.
* WHERE...Oregon Lower Treasure Valley.
* WHEN...Until 9 PM MST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* 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 in valleys.
* WHERE...Portions of south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 9 PM MST /8 PM PST/ Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Stagnant Air leading to the potential for decreasing air
quality.
* WHERE...Wenatchee Area, Waterville Plateau, Chelan County.
* WHEN...Until 4 AM PST Tuesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* ADDITIONAL DETAILS...Light wind and stable weather are
expected through at least Monday night leading to the
potential for decreasing air quality. Degraded air quality can
lead to issues for people with respiratory problems.
* WHAT...A high risk of sneaker waves is expected.
* WHERE...All beaches and shorelines of Douglas, Coos, and Curry
counties.
* WHEN...Until 5 PM PST this 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...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants over time.
* WHERE...Inner Vancouver Metro.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.