Non-Precipitation Warnings / Watches / Advisories
Issued by NWS Portland, OR

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WWUS76 KPQR 142151
NPWPQR

URGENT - WEATHER MESSAGE
National Weather Service Portland OR
151 PM PST Thu Dec 14 2017

...STAGNANT AIR CONDITIONS CONTINUE IN THE CENTRAL AND SOUTHERN
WILLAMETTE VALLEY THROUGH EARLY FRIDAY...

ORZ005-WAZ022-142300-
/O.EXP.KPQR.AS.Y.0002.000000T0000Z-171214T2200Z/
Lower Columbia-I-5 Corridor in Cowlitz County-
Including the cities of St. Helens, Clatskanie, Longview, Kelso,
and Castle Rock
151 PM PST Thu Dec 14 2017

...AIR STAGNATION ADVISORY WILL EXPIRE AT 2 PM PST THIS
AFTERNOON...

Increased mixing ahead of an approaching front will bring an end
to stagnant conditions, so the advisory will expire at 2 PM.

$$

WAZ039-142300-
/O.EXP.KPQR.AS.Y.0002.000000T0000Z-171214T2200Z/
Greater Vancouver Area-
Including the cities of Battle Ground, Ridgefield, Yacolt,
and Amboy
151 PM PST Thu Dec 14 2017

...AIR STAGNATION ADVISORY WILL EXPIRE AT 2 PM PST THIS
AFTERNOON...

Increased mixing ahead of an approaching front will bring an end
to stagnant conditions, so the advisory will expire at 2 PM.

$$

ORZ007-008-151800-
/O.CON.KPQR.AS.Y.0002.000000T0000Z-171215T1800Z/
Central Willamette Valley-South Willamette Valley-
Including the cities of Salem, McMinnville, Woodburn, Stayton,
Dallas, Eugene, Springfield, Corvallis, Albany, and Lebanon
151 PM PST Thu Dec 14 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...

* AIR QUALITY...Air quality may remain diminished due to an
  extended period of stagnant air conditions.

* TIMING...through early Friday morning.

* LOCATIONS...the southern Willamette Valley.

* IMPACTS...Limited ventilation may result in deteriorating air
  quality continuing through early Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Air Stagnation Advisory indicates that due to limited movement
of an air mass across the advisory area, pollution will increase
to dangerous levels. Persons with respiratory illness should
follow their physicians advice for dealing with high levels of
air pollution.

&&

$$



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