High Wind Warning 9, NWS Pendleton, OR

000 
WWUS76 KPDT 301844
NPWPDT

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
1044 AM PST THU NOV 30 2006


ORZ049-301945-
/O.EXP.KPDT.HW.W.0009.000000T0000Z-061130T1900Z/
GRANDE RONDE VALLEY-
INCLUDING THE CITIES OF...LA GRANDE...ELGIN...UNION
1044 AM PST THU NOV 30 2006

...HIGH WIND WARNING WILL EXPIRE AT 11 AM PST THIS MORNING...

THE HIGH WIND WARNING WILL EXPIRE AT 11 AM PST THIS MORNING. 

WINDS HAVE DECREASED ACROSS THE GRANDE RONDE VALLEY...THUS THE HIGH
WIND WARNING WILL BE ALLOWED TO EXPIRE AT 11 AM PST THIS MORNING.
WINDY CONDITIONS ARE STILL POSSIBLE NEAR LADD AND PYLES
CANYONS...THOUGH WILL GRADUALLY DECREASE THIS AFTERNOON.

$$

DK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
255 AM PST THU NOV 30 2006

.SHORT TERM...TODAY THROUGH FRIDAY...COLD AIR REMAINS OVER PACNW
INTERIOR THIS MORNING. A WARM FRONT IS MOVING THROUGH EASTERN
WASHINGTON AND OREGON AT THIS TIME AND IS PRODUCING LIGHT SNOW MIXED
WITH A LITTLE SLEET. IN GENERAL ACCUMULATIONS WITH THIS PART OF THE
SYSTEM WILL BE LIGHT. MORE PERSISTENT SNOW IS FALLING OVER THE
CENTRAL WASHINGTON CASCADE EAST SLOPES AND HAD TO ISSUE A SNOW
ADVISORY FOR THIS ZONE AROUND MIDNIGHT. EXPECT A BURST OF MODERATE
PRECIP WITH PASSAGE OF THE COLD FRONT MID TO LATE MORNING TODAY.
SHOULD SEE MEASURABLE SNOW WITH THIS FRONT...THOUGH COULD SEE
MEASURABLE SLEET IN THE YAKIMA VALLEY AND MEASURABLE SLEET AND
FREEZING RAIN IN THE COLUMBIA RIVER GORGE. THUS WILL CONTINUE
CURRENT WINTER WEATHER ADVISORIES FOR THE YAKIMA VALLEY AND COLUMBIA
GORGE. SNOWFALL OVER THE WASHINGTON BLUE MOUNTAIN FOOTHILL TODAY
COULD RUN 1 TO 3 INCHES FROM BOTH THE WARM AND COLD FRONTS SO WILL
ISSUE AN ADVISORY THERE. ELSEWHERE SNOW AND SLEET ACCUMULATIONS LOOK
TO BE BELOW ADVISORY LEVELS AT THIS TIME. ALSO WARM AIR WEDGE NOT
APPARENT AT THIS TIME SO WILL LIMIT FREEZING RAIN POSSIBILITY TO
ONLY A SLIGHT CHANCE OUTSIDE OF THE GORGE. COLD FRONT SHOULD BE OUT
OF WASHINGTON AND EXITING CENTRAL AND EXTREME NORTHEAST OREGON THIS
AFTERNOON. THUS SHOULD SEE PRECIP ENDING OR DECREASING TO ISOLATED
OR SCATTERED SHOWERS. TEMPS SHOULD POP UP INTO THE 30S AT MANY
LOCATIONS DUE TO MIXING OF RELATIVELY MILDER AIR ALOFT TO THE
SURFACE BEHIND THE COLD FRONT. VERY WINDY CONDITIONS IN THE GRANDE
RONDE VALLEY WILL PERSIST THROUGH THE MORNING...THEN DIE DOWN AS THE
COLD FRONT PASSES AROUND NOON. NORTHWEST FLOW ASSOCIATED WITH A
BUILD RIDGE OFFSHORE WILL MOVE INTO THE REGION TONIGHT BEHIND
TODAY/S SYSTEM. THUS WILL DRIER CONDITIONS WITH ONLY A FEW LINGERING
SHOWERS OVER THE HIGHER ELEVATIONS TONIGHT AND FRIDAY. 90

.LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...MEDIUM RANGE MODELS
IN SOME AGREEMENT BRINGING LOW AMPLITUDE RIDGING ALOFT ACROSS THE
REGION BY THE WEEKEND THROUGH THE MIDDLE OF NEXT WEEK. THIS WILL
RESULT IN THE STORM TRACK REMAINING GENERALLY TO THE NORTH. A WEAK
WAVE COULD CLIP CENTRAL/SOUTHERN WASHINGTON SUNDAY/SUNDAY NIGHT
PRODUCING A SLIGHT CHANCE OF SNOW SHOWERS ACROSS THE EAST CASCADE
SLOPES AND THE HIGHER TERRAIN OF NORTHEAST OREGON...OTHERWISE
DRY CONDITIONS WILL GENERALLY PREVAIL. TEMPERATURES WILL BE SOMEWHAT
MILDER THAN THE LAST SEVERAL DAYS...BUT STILL BELOW NORMAL. WITH SOME
RIDGING AT THE SURFACE AND ALOFT...THINK SOME PATCHY FOG IS POSSIBLE
ACROSS THE LOWER ELEVATIONS AT LEAST THROUGH THE WEEKEND...THUS WILL
KEEP WORDING IN THE FCST.

&&

.AVIATION...A WINTRY MIX WILL SPREAD ACROSS THE REGION THIS
MORNING. PRECIP WILL DIMINISH ACROSS ALL AREAS THIS AFTN...ENDING
ACROSS ALL BUT CENTRAL OREGON THIS EVENING...AND ENDING THERE
OVERNIGHT. PRECIP ACROSS BASIN/FOOTHILLS...INCLUDING KPDT/KALW/KPSC
WILL BEGIN AS SNOW...MIXING WITH SLEET WITH A MINOR THREAT OF
FREEZING RAIN BEFORE ENDING THIS AFTN. FOR THE GORGE...INCLUDING
KDLS...EXPECT SNOW...SLEET AND FREEZING RAIN. FOR KYKM/KRDM...SNOW
AND SLEET WILL PREDOMINATE...PERHAPS MIXING WITH SOME FREEZING
RAIN. LOWER END VFR CONDITIONS WILL PREVAIL DURING LONGER
PERIODS OF NON-PRECIPITATING WEATHER...WITH MVFR/IFR CONDITIONS
DURING PRECIP. CONDITIONS WILL IMPROVE TO VFR AREA WIDE TONIGHT.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  34  24  35  24 /  60  10  10  10
PSC  33  22  36  22 /  60  10  10  10
YKM  34  18  34  22 /  70  10  10  10
HRI  35  23  37  25 /  60  10  10  10
ELN  31  17  32  20 /  70  10  10  10
RDM  38  18  38  17 /  60  20  10  10
LGD  34  22  34  21 /  60  30  20  10
5J0  34  21  36  21 /  60  20  10  10
DLS  36  28  39  29 /  70  10  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...WINTER WEATHER ADVISORY UNTIL NOON PST TODAY FOR ORZ041.
     WIND ADVISORY UNTIL 11 AM PST THIS MORNING FOR ORZ049.

WA...WINTER WEATHER ADVISORY UNTIL NOON PST TODAY FOR WAZ024-027.
     SNOW ADVISORY UNTIL NOON PST TODAY FOR WAZ026-501.
     SNOW ADVISORY UNTIL NOON PST TODAY FOR WAZ029.

&&

TI:YGG
FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON
90/89/89

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1235 PM PST WED NOV 29 2006

ORZ041-WAZ024-501-502-026>030-ORZ042>044-049-050-501>506-301245-
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
KITTITAS VALLEY-YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
NORTHWEST BLUE MOUNTAINS-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-
1235 PM PST WED NOV 29 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.

.DAY ONE...REST OF TODAY AND TONIGHT

WINTER MIX
     YAKIMA VALLEY, LOWER COLUMBIA BASIN OF WASHINGTON, NORTH
     CENTRAL OREGON, LOWER COLUMBIA BASIN OF OREGON, NORTHERN
     WHEELER AND SOUTHERN GILLIAM COUNTIES

SNOW
     EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
     OF THE SOUTHERN CASCADES OF WASHINGTON, KITTITAS VALLEY

TONIGHT A PACIFIC WEATHER SYSTEM WILL MOVE INTO THE AREA.
TEMPERATURES WILL INITIALLY BE COLD ENOUGH FOR PRECIPITATION TO
BEGIN AS ALL SNOW. LATE TONIGHT THE SYSTEM WILL BEGIN PULLING COLDER
AIR FROM THE SOUTH...OVERRUNNING TRAPPED COLD AIR AT THE SURFACE. A
MIX OF SNOW...SLEET...AND FREEZING RAIN ARE EXPECTED IN THE YAKIMA
VALLEY AND COLUMBIA RIVER GORGE.  MOSTLY SNOW IS EXPECTED IN THE
KITTITAS VALLEY. SEE PRODUCT PDXWSWPDT (WWUS46 KPDT) FOR DETAILS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

WINTER MIX THURSDAY
     YAKIMA VALLEY, LOWER COLUMBIA BASIN OF WASHINGTON, FOOTHILLS
     OF THE BLUE MOUNTAINS OF WASHINGTON, NORTH CENTRAL OREGON,
     CENTRAL OREGON, LOWER COLUMBIA BASIN OF OREGON, FOOTHILLS OF
     THE BLUE MOUNTAINS OF OREGON, NORTHERN WHEELER AND SOUTHERN
     GILLIAM COUNTIES

SNOW THURSDAY
     EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
     OF THE SOUTHERN CASCADES OF WASHINGTON, KITTITAS VALLEY,
     NORTHWEST BLUE MOUNTAINS, GRANDE RONDE VALLEY, WALLOWA COUNTY,
     NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF
     OREGON, JOHN DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS

THE CONDITIONS THAT CREATE THE POSSIBILITY OF SLEET AND FREEZING
RAIN WILL CONTINUE DURING THE MORNING HOURS AND SPREAD EASTWARD
INTO THE FOOTHILLS OF THE BLUE MOUNTAINS AND SOUTHWARD INTO CENTRAL
OREGON AND NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES. SNOW
WILL SPREAD INTO THE BLUE MOUNTAINS AS WELL AS THE REST OF THE
AREAS OF CENTRAL AND NORTHEAST OREGON. THURSDAY NIGHT A RIDGE WILL
BUILD OVER THE AREA AND ENSURE GENERALLY FAIR WEATHER WITH A SLIGHT
CHANCE OF MOUNTAIN SNOW SHOWERS AND PATCHY FOG IN THE COLUMBIA
BASIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE LIKELY.

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/PENDLETON/CURRENTHAZARDS/HWO.HTML

ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE H IN
CURRENTHAZARDS.