Freezing Fog Advisory
Foothills of the Northern Blue Mountains of Oregon-
Foothills of the Southern Blue Mountains of Oregon-
including the cities of Pendleton, Pilot Rock, Heppner, Condon,
844 PM PST Thu Dec 7 2017
…AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST
…FREEZING FOG ADVISORY REMAINS IN EFFECT UNTIL NOON PST
* TEMPERATURES…25 to 32.
* AIR QUALITY…Moderate to unhealthy.
* VISIBILITIES…One quarter mile or less at times.
* TIMING…Freezing fog through Friday morning…especially above
1500 feet. Stagnant air to persist into next week.
* IMPACTS…Persons with respiratory issues should follow the
advice of their physician on how to deal with poor air
quality. Also outdoor burning may be limited, so please
consult with your local burn agencies. Motorists should be
prepared for sudden changes in visibility. Also roadways and
sidewalks may become slippery due to fog freezing on surfaces.
A Freezing 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.
Also…be alert for frost on bridge decks causing slippery roads.
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. Persons with
respiratory illness should follow their physicians advice for
dealing with high levels of air pollution.
During periods of stagnant air…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…where
people live and breathe. Check with your local burn agency for
any current restrictions in your area.