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

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000
WWUS76 KPDT 181148
NPWPDT

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
348 AM PST THU DEC 18 2014

...STAGNANT CONDITIONS TO CONTINUE THROUGH THE WEEK...

.INVERSIONS WILL RESULT IN STAGNANT CONDITIONS WITH LOW CLOUDS
AND PATCHY FOG.

WAZ026-182300-
/O.CAN.KPDT.FG.Y.0014.000000T0000Z-141218T1800Z/
/O.CON.KPDT.AS.Y.0004.000000T0000Z-141219T1800Z/
KITTITAS VALLEY-
INCLUDING THE CITIES OF...ELLENSBURG...THORP
348 AM PST THU DEC 18 2014

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...
...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS CANCELLED THE DENSE
FOG ADVISORY. AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL
10 AM PST FRIDAY.

* TIMING: AIR STAGNATION ADVISORY THROUGH AT LEAST MIDDAY FRIDAY.
  THE FOG LAYER HAS LIFTED INTO A LOW STRATUS LAYER WITH IMPROVED
  VISIBILITY. THEREFORE THE DENSE FOG ADVISORY HAS BEEN CANCELLED.

* IMPACTS: POLLUTANTS TRAPPED NEAR THE SURFACE CAN NEGATIVELY
  AFFECT THOSE WITH RESPIRATORY CONDITIONS.

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.

&&

$$

ORZ507-508-WAZ029-181300-
/O.CAN.KPDT.FG.Y.0014.000000T0000Z-141218T1800Z/
FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON-
FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
INCLUDING THE CITIES OF...PENDLETON...PILOT ROCK...HEPPNER...
CONDON...FOSSIL...DAYTON...WAITSBURG...WALLA WALLA
348 AM PST THU DEC 18 2014

...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS CANCELLED THE DENSE
FOG ADVISORY.

THE FOG LAYER HAS LIFTED INTO A LOW STRATUS LAYER WITH IMPROVED
VISIBILITY. THEREFORE THE DENSE FOG ADVISORY HAS BEEN CANCELLED.

$$

WAZ027-028-182300-
/O.CON.KPDT.AS.Y.0004.000000T0000Z-141219T1800Z/
YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
INCLUDING THE CITIES OF...NACHES...SUNNYSIDE...TOPPENISH...
YAKIMA...CONNELL...PROSSER...TRI-CITIES
348 AM PST THU DEC 18 2014

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

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

* TIMING: THROUGH AT LEAST MIDDAY FRIDAY.

* LOCATIONS: VALLEYS IN AND AROUND THE LOWER COLUMBIA BASIN OF
  WASHINGTON INCLUDING THE YAKIMA VALLEY.

* IMPACTS: POLLUTANTS TRAPPED NEAR THE SURFACE CAN NEGATIVELY
  AFFECT THOSE WITH RESPIRATORY CONDITIONS.

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.

&&

$$






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