KORSHERW28

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less 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...Treasure Valley Zones.

* WHEN...For the Dense Fog Advisory, until 2 PM MST Friday. For the
Air Stagnation Advisory, until 5 PM MST Saturday.

* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.

* ADDITIONAL DETAILS...Fog could produce patchy black icy for slick
roads.

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

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.

* WHAT...Visibility less than one quarter mile in freezing fog.

* WHERE...Foothills of the Southern Blue Mountains of Oregon and
North Central Oregon.

* WHEN...Until 11 AM PST this morning.

* IMPACTS...Low visibility and slick roads could make driving
conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

* WHAT...Visibility less than one quarter of a mile in freezing fog.

* WHERE...John Day Basin.

* WHEN...Until 11 AM PST this morning.

* IMPACTS...Low visibility and slick roads could make driving
conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

* 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 5 PM MST /4 PM PST/ Saturday.

* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.

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.

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less 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...Treasure Valley Zones.

* WHEN...For the Dense Fog Advisory, until 2 PM MST Friday. For the
Air Stagnation Advisory, until 5 PM MST Saturday.

* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.

* ADDITIONAL DETAILS...Fog could produce patchy black icy for slick
roads.

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

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.