HAZARDOUS WEATHER OUTLOOK
Issue Date: 334 PM PST MON DEC 14 2009
Expiration: 615 AM PST TUE DEC 15 2009

Expires:200912151415;;
FLUS46 KPDT 142334 AAA
HWOPDT
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
334 PM PST MON DEC 14 2009
ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-151415-
EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
CENTRAL OREGON-LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-
WALLOWA COUNTY-FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-JOHN DAY BASIN-
OCHOCO-JOHN DAY HIGHLANDS-
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-KITTITAS VALLEY-
YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
NORTHWEST BLUE MOUNTAINS-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
334 PM PST MON DEC 14 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TONIGHT
WINTER MIX
     EASTERN COLUMBIA RIVER GORGE OF WASHINGTON, LOWER COLUMBIA
     BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF
     WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON, LOWER
     COLUMBIA BASIN OF OREGON, FOOTHILLS OF THE BLUE MOUNTAINS OF
     OREGON
SNOW
     EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
     OF THE SOUTHERN CASCADES OF WASHINGTON, KITTITAS VALLEY,
     YAKIMA VALLEY, NORTHWEST BLUE MOUNTAINS, GRANDE RONDE VALLEY,
     WALLOWA COUNTY, NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN
     BLUE MOUNTAINS OF OREGON, NORTHERN WHEELER AND SOUTHERN
     GILLIAM COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS
A STRONG PACIFIC STORM SYSTEM WILL INVADE WASHINGTON AND OREGON THIS
EVENING THROUGH TUESDAY...BRINGING A WINTRY MIX OF SNOW...SLEET
AND FREEZING RAIN EAST OF THE CASCADES. PRECIPITATION WILL DEVELOP
ALONG THE EAST SLOPES OF THE CASCADES LATE THIS AFTERNOON THEN WILL
SPREAD OVER THE REMAINDER OF THE REGION TONIGHT.  MODERATE TO HEAVY
SNOW IS FORECAST FOR THE EAST SLOPES OF THE WASHINGTON CASCADES AS
WELL AS THE KITTITAS AND YAKIMA VALLEYS...AND WINTER STORM WARNINGS
AND WINTER WEATHER ADVISORIES HAVE BEEN POSTED FOR THESE AREAS.  IN
ADDITION...A WINTER WEATHER ADVISORIES HAVE BEEN ISSUED FOR MUCH OF
THE REMAINDER OF THE AREA FOR EITHER SNOW OR A WINTERY MIX. DETAILS
ON THIS SIGNIFICANT WINTER WEATHER EVENT CAN BE FOUND IN THE NWS
PRODUCT PDXWSWPDT.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
WINTER MIX TUESDAY
     EASTERN COLUMBIA RIVER GORGE OF WASHINGTON, LOWER COLUMBIA
     BASIN OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON,
     LOWER COLUMBIA BASIN OF OREGON
SNOW TUESDAY
     EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
     OF THE SOUTHERN CASCADES OF WASHINGTON, KITTITAS VALLEY,
     YAKIMA VALLEY, NORTHWEST BLUE MOUNTAINS, GRANDE RONDE VALLEY,
     WALLOWA COUNTY, NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN
     BLUE MOUNTAINS OF OREGON, NORTHERN WHEELER AND SOUTHERN
     GILLIAM COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS
MODERATE TO HEAVY SNOW...SLEET...AND FREEZING RAIN WILL CONTINUE FOR
MOST OF THE AREA THROUGH TUESDAY MORNING.  A WARM FRONT WILL
GRADUALLY WARM THE AIR MASS TUESDAY THROUGH WEDNESDAY...BUT ICY
CONDITIONS ARE EXPECTED IN THE COLUMBIA BASIN THROUGH TUESDAY
AFTERNOON UNTIL THE COLD AIR AT THE SURFACE SCOURS OUT.  A SERIES OF
PACIFIC FRONTAL SYSTEMS WILL BRING LOW ELEVATION RAIN AND A
RAIN/SNOW MIX OVER THE MOUNTAINS THROUGH THE REMAINDER OF THE
PERIOD.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED.
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS
ARE DISPLAYED ON THE WORLD WIDE WEB AT:
WWW.WRH.NOAA.GOV/PDT/CURRENTHAZARDS/HWO.HTML
ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE H IN
CURRENTHAZARDS.
$$

WINTER WEATHER ADVISORY
Issue Date: 315 PM PST MON DEC 14 2009
Expiration: 600 PM PST TUE DEC 15 2009

...ANOTHER WINTER STORM WILL IMPACT EASTERN OREGON AND WASHINGTON
TONIGHT THROUGH TUESDAY AFTERNOON...
.A PACIFIC STORM WILL SPREAD A WINTRY MIX OF PRECIPITATION OVER
EASTERN OREGON AND SOUTH CENTRAL AND SOUTHEAST WASHINGTON. THE
PRECIPITATION WILL INCLUDE SIGNIFICANT SNOW AND FREEZING RAIN.
WAZ027-150700-
/O.CON.KPDT.WW.Y.0042.091215T0000Z-091216T0200Z/
YAKIMA VALLEY-
INCLUDING THE CITIES OF...SUNNYSIDE...YAKIMA
314 PM PST MON DEC 14 2009
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST
TUESDAY SNOW AND FREEZING RAIN...
A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST
TUESDAY.
* A WINTER STORM WILL ARRIVE THIS EVENING WITH A WINTRY MIX
  INCLUDING SIGNIFICANT SNOW INTO TUESDAY AND THEN CHANGING TO
  FREEZING RAIN DURING THE DAY ON TUESDAY.
* A STORM TOTAL OF 3 TO 6 INCHES OF SNOW IS EXPECTED IN THE YAKIMA
  VALLEYS. ICE ACCUMULATIONS LESS THAN ONE QUARTER OF AN INCH ARE
  EXPECTED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY IS ISSUED WHEN SNOW IS OCCURRING OR IS
EXPECTED TO DEVELOP AND ACCUMULATE. TRAVEL MAY BE HAZARDOUS...
ESPECIALLY ON BRIDGES...OVERPASSES...AND SECONDARY ROADS.
MOTORISTS ARE URGED TO USE EXTREME CAUTION...AND SLOW DOWN TO
ADJUST FOR RAPIDLY CHANGING DRIVING CONDITIONS AND REDUCED
VISIBILITIES. FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB
SITE AT WWW.WEATHER.GOV/PENDLETON.
&&
$$

WINTER STORM WARNING
Issue Date: 315 PM PST MON DEC 14 2009
Expiration: 600 PM PST TUE DEC 15 2009

...ANOTHER WINTER STORM WILL IMPACT EASTERN OREGON AND WASHINGTON
TONIGHT THROUGH TUESDAY AFTERNOON...
.A PACIFIC STORM WILL SPREAD A WINTRY MIX OF PRECIPITATION OVER
EASTERN OREGON AND SOUTH CENTRAL AND SOUTHEAST WASHINGTON. THE
PRECIPITATION WILL INCLUDE SIGNIFICANT SNOW AND FREEZING RAIN.
WAZ501-150700-
/O.CON.KPDT.WS.W.0011.091215T0000Z-091216T0200Z/
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
INCLUDING THE CITIES OF...CLE ELUM...EASTON...ROSLYN...NACHES
314 PM PST MON DEC 14 2009
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST
TUESDAY FOR HEAVY SNOW...
A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM PST TUESDAY.
* A WINTER STORM WILL ARRIVE TONIGHT WITH SIGNIFICANT SNOW
  THROUGH TUESDAY AFTERNOON.
* A STORM TOTAL OF 10 TO 18 INCHES OF SNOW IS EXPECTED ALONG THE
  EAST SLOPES OF THE CENTRAL WASHINGTON CASCADES.
* HIGHWAYS THROUGH MOUNTAIN PASSES WILL LIKELY BE COVERED WITH
  SIGNIFICANT SNOW CREATING HAZARDOUS WINTER DRIVING CONDITIONS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT SNOW
ACCUMULATIONS ARE EXPECTED. SNOWFALL INTENSITIES WILL BE HEAVY
ENOUGH TO SUBSTANTIALLY REDUCE VISIBILITIES AT TIMES. FOR
ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT
WWW.WEATHER.GOV/PENDLETON.
&&
$$