Eastern Columbia River Gorge of Washington Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Dense Fog Advisory, Air Stagnation Advisory
Issued: 5:09 AM PST Nov. 20, 2018 – National Weather Service

... Dense fog advisory in effect until noon PST today...
... Air stagnation advisory remains in effect until 1 PM PST
Wednesday...

The National Weather Service in Pendleton has issued a dense fog
advisory... which is in effect until noon PST today.

* Air quality... a ridge of high pressure will remain across the
region and produce a low level inversions with light winds. Air
quality will slowly degrade over the period.

* Visibilities... one quarter of a mile or less at times.

* Timing... poor air quality until at least Wednesday mid day.
Dense fog through noon today.

* Impacts... limited visibility and possible slick roadways due to
fog droplets freezing on surfaces. Poor air quality may cause
issues for people with respiratory problems.

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an air mass across the advisory area... pollution has the
potential to increase to dangerous levels. State air quality
agencies highly recommend that no outdoor burning occur and that
residential wood burning devices be limited as much as possible.
According to state air quality agencies... prolonged periods of
stagnant air can hold pollutants close to the ground. Check with
your local burn agency for any current restrictions in your area.

An air stagnation advisory indicates that due to limited movement
of an air mass across the advisory area... pollution has the
potential to increase to unhealthy levels. Persons with
respiratory illness should follow their physicians advice for
dealing with high levels of air pollution.

A dense fog advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving... slow down...
use your headlights... and leave plenty of distance ahead of you.






Local Radar

Click to Enlarge

Nearby Radar Stations