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Washington, Kittitas Valley

Dense Fog Advisory, Air Stagnation Advisory

Statement as of 2:18 PM PST on December 17, 2014

Expires 1:00 PM EST on December 19, 2014


... Air stagnation advisory remains in effect until 10 am PST
Friday...
... Dense fog advisory in effect from 6 PM this evening to 10 am
PST Thursday...

The National Weather Service in Pendleton has issued a dense fog
advisory... which is in effect from 6 PM this evening to 10 am PST
Thursday. An air stagnation advisory remains in effect until
10 am PST Friday.

* Timing: air stagnation advisory through at least midday Friday.
Widespread dense fog will develop in the Kittitas Valley after
sunset. Rain showers overnight may briefly improve visibilities.

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

* Locations: the Kittitas Valley.

* Impacts: pollutants trapped near the surface can negatively
affect those with respiratory conditions. Motorists will have
to use caution as visibilities will change suddenly. Roadways
may become slick in areas where temperatures fall to around
freezing.

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an air mass across the advisory area... pollution will
increase. Check with your local air quality agency for possible
restrictions in your area. For additional weather information...
check our website at www.Weather.Gov/Pendleton.

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.






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