Western Washington

927 
FXUS66 KSEW 120432 CCA
AFDSEW

AREA FORECAST DISCUSSION...CORRECTED TYPO IN THE AVIATION SECTION
NATIONAL WEATHER SERVICE SEATTLE WA
828 PM PST SAT FEB 11 2012

.SYNOPSIS...A VERY MOIST AIR MASS WILL KEEP SKIES CLOUDY TONIGHT 
WHILE A WEAK UPPER LEVEL RIDGE ALLOWS SHOWERS TO DIMINISH. AN 
APPROACHING COLD FRONT WILL BRING RAIN TO THE COAST SUNDAY 
AFTERNOON...WITH RAIN SPREADING TO THE INTERIOR BY EARLY EVENING. AN 
UPPER LEVEL TROUGH WILL KEEP MONDAY MOSTLY CLOUDY WITH A CHANCE OF 
SHOWERS. A WEAK COLD FRONT WILL BRING SCATTERED SHOWERS ON TUESDAY.  
UNSETTLED WEATHER WILL PERSIST LATE NEXT WEEK.

&&

.SHORT TERM...RADAR SHOWS SHOWERS DIMINISHING OVER THE AREA THIS 
EVENING...BUT OBS SHOW BKN-OVC CLOUD LAYERS LOWERING TO MVFR AND 
INCREASING IN COVERAGE. THE WEAK UPPER LEVEL RIDGE MOVING OVER THE 
AREA TONIGHT WILL CONTINUE TO SUPPRESS THE SHOWER ACTIVITY...BUT 
WITH SUCH A MOIST LOW LEVEL AIR MASS THERE COULD STILL BE SOME VERY 
LIGHT SPRINKLES OR DRIZZLE OVERNIGHT. 

MODELS REMAIN CONSISTENT WITH THE TIMING AND STRENGTH OF THE 
APPROACHING COLD FRONT...NEAR 135W AT 03Z. RAIN WILL REACH THE COAST 
BY SUNDAY AFTERNOON...THEN SPREAD OVER THE INTERIOR BY EARLY 
EVENING. THE UPPER LEVEL TROUGH DRIVING THE FRONT SPLITS SUNDAY 
NIGHT WITH THE BULK OF THE ENERGY HEADING TOWARD N CA. THIS ALLOWS 
THE FRONT TO STALL AND DIE OVER W WA...KEEPING THE LOWER AIR MASS 
RATHER MOIST THROUGH MONDAY. CHANCE POPS IN THE MOIST POST-FRONTAL 
AIR MASS WILL CONTINUE THROUGH MONDAY ALTHOUGH THEY WILL BE 
DECREASING THROUGH THE DAY.

MODEL DISCORD PERSISTS WITH THE TUESDAY SYSTEM. THE MAIN 
DISAGREEMENT IS WITH THE TRACK OF THE UPPER LEVEL LOW. 00Z NAM/12Z 
ECMWF/12Z CANADIAN ALL PLAY ABOUT THE SAME TUNE BUT WITH DIFFERENT 
ARRANGEMENTS. EACH SPORTS A SLIGHTLY DIFFERENT SOLUTION WITH THE 
TRACK OF THE LOW/UPPER LEVEL TROUGH...BUT AGREE ON BRINGING A SKINNY 
COLD FRONT ACROSS W WA DURING THE DAY. THE 00Z GFS REMAINS THE 
OUTLIER...DIGGING THE UPPER LEVEL LOW OFFSHORE...WITH THE ASSOCIATED 
FRONT NEVER GETTING ANYWHERE NEAR W WA. THE GFS WOULD HAVE A DRY 
TUESDAY. CURRENT FORECAST WITH CHANCE POPS LOOKS THE BEST GIVEN THE 
MAJORITY CONSENSUS FOR A SKINNY COLD FRONT. KAM

.LONG TERM...PREVIOUS DISCUSSION FROM THE 330 PM 
AFD...UNUSUALLY...THE MODELS ARE BACK IN SYNC BY THURSDAY. THE 
MORNING LOOKS DRY WHILE ANOTHER SYSTEM ARRIVES IN THE AFTERNOON. 
THAT IS PROBABLY A LITTLE TOO DETAILED FOR THE DAY FIVE FORECAST. 
HAVE MAINLY BROAD BRUSHED CHANCE POPS INTO THE FORECAST THROUGH NEXT 
SATURDAY. TEMPERATURES WILL PROBABLY BE AROUND CLIMATOLOGY. BURKE

&&

.HYDROLOGY...FLOODING IS UNLIKELY DURING THE NEXT 7 DAYS.

&&

.AVIATION...HIGH PRESSURE ALOFT WILL TRAVERSE WRN WA TONIGHT 
THROUGH SUNDAY MORNING. AN UPPER TROUGH WILL DIG SE THROUGH THE AREA 
SUNDAY AFTERNOON AND EVENING. LIGHT WLY FLOW ALOFT TONIGHT BECOMING 
MODERATE SW FLOW ALOFT AHEAD OF THE TROUGH ON SUNDAY. THE AIR MASS 
IS GENERALLY MOIST AND SLIGHTLY UNSTABLE...BECOMING STABLE LATER 
TONIGHT. 

KSEA...SOUTH WIND 6-10 KNOTS...EASING TO 3-6 KNOTS AFTER 09Z 
TONIGHT...THEN SWLY 5-9 KT SUNDAY AFTERNOON. DTM

&&

.MARINE...WINDS WILL REMAIN BELOW 20 KT THROUGH SUNDAY MORNING 
BETWEEN WEATHER SYSTEMS. A FRONTAL SYSTEM WILL LIKELY BRING SMALL 
CRAFT ADVISORY SOUTHERLY WINDS TO THE COASTAL WATERS BY SUNDAY 
AFTERNOON AND EVENING. ADDITIONAL FRONTAL SYSTEMS MAY AFFECT THE 
WATERS AROUND TUESDAY AND THURSDAY OF NEXT WEEK BUT TIMING AND 
DETAILS VERY UNCERTAIN AT THIS TIME DUE TO MAJOR MODEL DIFFERENCES. 
DTM/SCHNEIDER 

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORY FOR ROUGH GRAYS HARBOR BAR.

$$

YOU CAN SEE AN ILLUSTRATED VERSION OF THE FORECAST DISCUSSION AT
WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTML.


WWW.WEATHER.GOV/SEATTLE

Southwestern Washington and Western Oregon

789 
FXUS66 KPQR 120456
AFDPQR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PORTLAND OR
855 PM PST SAT FEB 11 2012

.SYNOPSIS...THE REMAINS OF A LOW THAT HAD BEEN ALONG THE WASHINGTON
COAST WERE MOVING INLAND TONIGHT WITH SHOWERS DECREASING OVERNIGHT.
BRIEF HIGHER PRESSURE WILL MOVE IN OVER THE PACIFIC NORTHWEST LATER
TONIGHT AND EARLY SUNDAY. THEN THE NEXT PACIFIC FRONTAL SYSTEM WILL
APPROACH THE COAST BY LATE SUNDAY MORNING AND BEGIN SLOWLY MOVING
INLAND IN THE AFTERNOON...SPREADING THROUGH THE INLAND AREAS LATE
SUNDAY AND SUNDAY EVENING. THE FRONT WILL STRETCHING OUT AND
WEAKENING SOME AS A GOOD CHUNK OF THE ENERGY DIGS TOWARD CALIFORNIA.
THE FRONT WILL SLOWLY MOVE EAST OF THE CASCADES AFTER MIDNIGHT SUNDAY
NIGHT. ONSHORE FLOW BEHIND THIS SYSTEM WILL KEEP SHOWERS GOING A 
WHILE INTO MONDAY WITH SNOW LEVELS WELL BELOW THE CASCADE PASSES. 
AFTER A BIT OF A BREAK AGAIN MONDAY NIGHT...ANOTHER SYSTEM IS 
EXPECTED TUESDAY...THOUGH TIMING AND DETAILS ARE A BIT UNCERTAIN DUE 
TO MODEL DIFFERENCES.
&&

.SHORT TERM...THE LAST VESTIGES OF THE WEAKENING LOW THAT HAD BEEN
ALONG THE WASHINGTON COAST WERE MOVING THROUGH OVERNIGHT. THE BEST 
ONSHORE FLOW AND SHOWER COVERAGE HAS BEEN MOSTLY NORTH THE COLUMBIA 
RIVER. SHOWERS ON THE PORTLAND NATIONAL WEATHER SERVICE DOPPLER 
RADAR HAVE DECREASED DRAMATICALLY ACROSS OUR NORTHERN FORECAST 
ZONES...AND THIS TREND WILL CONTINUE OVERNIGHT.

THE MAIN PROBLEM OVERNIGHT WILL BE HOW MUCH FOG WILL WE SEE DEVELOP.
THERE IS A PRETTY GOOD DECK OF STRATOCUMULUS CLOUDS OVER THE AREA AND
THIS MAY TAKE UNTIL LATE BEFORE BREAKING UP...AND IF SO THE FOG COULD
BE PATCHIER THAN WE HAVE FORECAST.

THE NEXT UPSTREAM FRONTAL SYSTEM IS NEARING 130W AND WILL APPROACH
THE COAST SUNDAY MORNING. THE MODELS INDICATE THE RAIN MAY REACH THE
COAST LATE SUNDAY MORNING...THEN BEGIN TO SPREAD ONSHORE IN THE
AFTERNOON. THE MAIN PROBLEM WITH THIS SYSTEM IS THAT IT WILL BE
STRETCHING OUT AND SLOWING DOWN AS IT MOVES INTO OUR AREA AS A
SIGNIFICANT PORTION OF THE ENERGY WILL BE DIGGING SOUTH TOWARD
CALIFORNIA. THE MAIN PERIOD OF PRECIPITATION INLAND WILL BE LATE
SUNDAY AND SUNDAY EVENING...BUT AMOUNTS WILL BE SOMEWHAT HAMPERED BY
THE DIGGING AND ELONGATING OF THE FRONT.

THE FRONT WILL ALSO LOWER SNOW LEVELS TO WELL BELOW THE PASSES SUNDAY
NIGHT AND MONDAY...AND POSSIBLY INTO THE UPPER ELEVATIONS OF THE
CASCADE FOOTHILLS AND THE HIGHER COAST RANGE. THERE WILL BE SOME
ONSHORE FLOW BEHIND THE FRONT...BUT SNOW AMOUNTS IN THE CASCADES
SHOULD STAY BELOW ADVISORY THRESHOLDS. THE ONSHORE FLOW WEAKENS LATER
MONDAY AND MONDAY EVENING...AND QPF AMOUNTS SHOULD ACCORDINGLY 
DECREASE.

THE MODELS MOSTLY INDICATE ANOTHER SYSTEM COMING IN TUESDAY. THE ONE
EXCEPTION IS THE GFS MODEL...WHICH HAS BEEN PERSISTENT IN TAKING IT
SOUTH OF OUR AREA. BUT THE NAM12...WHICH GETS ITS BOUNDARY CONDITIONS
FROM THE GFS...IS VERY VERY SIMILAR TO THE ECMWF...WHICH BRINGS A
SYSTEM IN ON TUESDAY. OUR CURRENT FORECAST LEANS HEAVILY TOWARD THE 
ECMWF...NAM12...GEM BLEND BUT WE HAVE STAYED IN THE CHANCE POP 
CATEGORY DUE TO THE MODEL DIFFERENCES AT THIS POINT. SNOW LEVELS 
WILL STILL BE WELL BELOW THE CASCADE PASSES ON TUESDAY. TOLLESON

.LONG TERM...NO CHANGES. PREVIOUS DISCUSSION FOLLOWS...EXTENDED
PERIOD BEGINS TUE NIGHT WITH SOME SIGNIFICANT DIFFERENCES IN MODELS
REGARDING THE PLACEMENT OF A CUTOFF LOW COMING IN OFF THE PAC. GIVEN
THE PERSISTENCE OF BOTH OPERATIONAL GFS AND ECMWF MODELS...AND THE
THE LACK OF CONSISTENCY WITH ENSEMBLES MEANS...IT IS DIFFICULT TO PUT
MUCH CONFIDENCE INTO ANY PARTICULAR SOLUTION FOR TUE NIGHT AND WED.
AS SUCH...WILL LEAVE POPS IN CHANCE CATEGORY THEN. 

MODELS AGREE ON RETURNING A TRANSIENT RIDGE TO THE PACNW WED NIGHT
AND THU. WILL TRIM BACK POPS SOME IN THIS TIME PERIOD...BUT RUN TO
RUN INCONSISTENCIES PREVENT GOING DRY. AFTER THAT...PATTERN APPEARS
TO REMAIN PROGRESSIVE...BUT WITH SIGNIFICANT MODEL DIFFERENCES. FOR
NOW WILL LEAN A LITTLE TOWARDS THE WET SIDE OF CLIMATOLOGY.
&&

.AVIATION...VFR CONDITIONS INLAND WITH MARGINAL MVFR AT THE COAST
THIS EVENING. EXPECT THESE CONDITIONS TO CONTINUE THROUGH THE
REMAINDER OF THE EVENING AND WELL INTO THE OVERNIGHT PERIOD. CLEARING
EXPECTED TO DEVELOP LATE IN THE OVERNIGHT PERIOD. COMBINED WITH LIGHT
WINDS...THIS CLEARING SHOULD ALLOW A FEW HOURS OF FOG OR LOW STRATUS
TO DEVELOP EARLY THIS MORNING. EXPECT FOG AND STRATUS TO DISSIPATE BY
MID TO LATE MORNING AS HIGH CLOUDS BEGIN TO ARRIVE AHEAD OF THE NEXT
SYSTEM. VFR EXPECTED THROUGH MUCH OF THE AFTERNOON. A FRONTAL SYSTEM
WILL BEGIN TO SPREAD RAIN AND CLOUDS ONSHORE LATE IN THE
AFTERNOON...PUSHING INLAND DURING THE EVENING. JFP

KPDX AND APPROACHES...EXPECT VFR CONDITIONS THIS EVENING AND MOST OF
THE OVERNIGHT PERIOD. EXPECT A PERIOD OF MVFR/IFR IN LOW CLOUDS OR
FOG AFTER 12Z. SHOULD SEE RETURN TO VFR BY 18Z. JFP
&&

.MARINE...WEAK HIGH PRES WILL CONTINUE TO BUILD OVER THE WATERS
TONIGHT INTO TOMORROW AM. HOWEVER...THE NEXT FRONT WILL PUSH ACROSS
THE AREA LATER TOMORROW. SOME POTENTIAL FOR LOW END GALE GUSTS LATE
TOMORROW NIGHT INTO MON AM BEHIND THE FRONT. FOR NOW...WILL HOLD OFF
ON GALE WATCH DUE TO LACK OF MUCH COLD AIR FORCING IN THE MODELS. BUT
EXPECT WE WILL GET HIGH END SMALL CRAFT ADVISORY WINDS.

SEAS RUNNING 8 TO 9 FT THROUGH THIS MORNING. HOWEVER...SEAS BEGIN
CLIMBING AGAIN TOMORROW AFTERNOON...WITH SEAS APPROACHING 15 FT
EXPECTED LATER TOMORROW AND MON AS NW WINDS INCREASE.
&&

.PQR WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
PZ...SMALL CRAFT ADVISORY FOR WINDS FROM 6 PM SUNDAY TO 6 PM PST 
     MONDAY FOR COASTAL WATERS FROM CAPE SHOALWATER WA TO FLORENCE
     OR OUT 60 NM.

     SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS FROM NOON SUNDAY TO 6
     AM PST TUESDAY FOR COASTAL WATERS FROM CAPE SHOALWATER WA TO
     FLORENCE OR OUT 60 NM.

     SMALL CRAFT ADVISORY FOR ROUGH COLUMBIA RIVER BAR FROM 6 AM TO
     10 AM PST SUNDAY.

     SMALL CRAFT ADVISORY FOR ROUGH COLUMBIA RIVER BAR FROM 6 PM TO
     10 PM PST SUNDAY.

&&

$$

MORE WEATHER INFORMATION ONLINE AT...
HTTP://WEATHER.GOV/PORTLAND

THIS DISCUSSION IS FOR NORTHWEST OREGON AND SOUTHWEST WASHINGTON FROM
THE CASCADE CREST TO 60 NAUTICAL MILES OFFSHORE. THE AREA IS COMMONLY
REFERRED TO AS THE FORECAST AREA.

Southeastern Washington and Northeastern Oregon

564 
FXUS66 KPDT 120336
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
735 PM PST SAT FEB 11 2012

.UPDATE...A WEATHER SYSTEM AND AN UPPER TROUGH IS CURRENTLY EXITING 
THE AREA AT THIS TIME. THERE ARE STILL A FEW ISOLATED SHOWERS OVER 
THE NORTHEAST MOUNTAINS...BUT THEY ARE DECREASING RAPIDLY WITH NIGHT 
TIME STABILIZATION. MAIN CONCERN OVERNIGHT WILL BE FOG DEVELOPMENT 
AND HOW WIDESPREAD AND/OR IF IT WILL BECOME DENSE. TEMPERATURES ARE 
DROPPING RAPIDLY NOW THAT SKIES ARE CLEARING BUT DEW POINT 
TEMPERATURES ARE NOT DROPPING AS FAST. EXPECT FOG TO FORM WHEN THE 
TEMPERATURE DROPS TO THE DEW POINT AND THE AIR BECOMES SATURATED. 
CURRENTLY THE MOST LIKELY AREAS FOR FOG DEVELOPMENT LOOK TO BE THE 
BLUE MOUNTAIN FOOTHILLS AND THE LOWER COLUMBIA BASIN. THESE 
LOCATIONS HAVE THE LEAST AMOUNT OF CLOUDS AT THIS TIME WITH THE 
LARGEST FALLS IN TEMPERATURE SO FAR. ALSO CENTRAL OREGON MAY HAVE 
FOG DEVELOPMENT AS ITS TEMPERATURE ARE ALSO DROPPING FAST AND 
NEARING THE DEW POINT. THERE WILL BE A FAST MOVING RIDGE OVER THE 
REGION ON SUNDAY AND THEN THE NEXT WEATHER SYSTEM WILL MOVE IN 
SUNDAY NIGHT INTO MONDAY. SNOW LEVELS WILL BE LOW ENOUGH FOR 
MOUNTAIN SNOW...GENERALLY ABOVE 2500-3000 FEET. ADVISORIES MAY BE 
NEEDED... ESPECIALLY ALONG THE OREGON CASCADE EAST SLOPES. THIS 
WEATHER SYSTEM WILL SLIDE SOUTHEAST AND AFFECT SOUTHWEST PORTIONS OF 
THE FORECAST AREA THE MOST. ELSEWHERE AT LEAST SEVERAL INCHES OF 
SNOW CAN BE EXPECTED IN THE MOUNTAINS...BUT PROBABLY NOT ENOUGH FOR 
NEITHER A WARNING NOR AN ADVISORY. HOWEVER IT WILL NEED TO BE 
WATCHED CLOSELY. 88

&&

.AVIATION...06Z TAFS...MVFR OR POSSIBLY EVEN IFR CONDITIONS MAY 
DEVELOP DUE TO THE FORMATION OF FOG AND/OR LOW CLOUDS AT ALL 
LOCATIONS. HOWEVER THE GREATEST CHANCE FOR BELOW VFR CONDITIONS WILL 
BE AT KPDT...KALW...KPSC...KRDM AND KBDN. CONDITIONS WILL IMPROVE 
AFTER SUNRISE ON SUNDAY. ANOTHER WEATHER SYSTEM WILL THEN MOVE INTO 
THE REGION SUNDAY NIGHT WITH DETERIORATING CONDITIONS AGAIN AS 
CEILINGS LOWER AND PRECIPITATION DEVELOPS. WINDS WILL REMAIN LIGHT 
AND GENERALLY UNDER 10 KTS THROUGH THE NEXT 24 HOURS. 88

&&

.PREV DISCUSSION... /ISSUED 334 PM PST SAT FEB 11 2012/ 

SHORT TERM...TONIGHT THROUGH TUESDAY. AN UPPER LEVEL TROUGH OVER 
WA/OR IS GRADUALLY SHIFTING EAST AND WILL MOVE INTO IDAHO SUNDAY 
MORNING.  SEVERAL WAVES ARE EMBEDDED WITH THE TROUGH.  ONE 
CIRCULATION IS REMAINING STATIONARY OVER NE OREGON.  THE EMBEDDED 
WAVE IS WEAK...AND DOPPLER RADAR HAS BEEN SHOWING RETURNS LESS THAN 
35 DBZ SINCE THIS MORNING. VERY LIGHT PRECIPITATION HAS BEEN 
REPORTED WITH THE SCATTERED SHOWERS. SNOW LEVELS ARE AROUND 4500 
FEET THIS AFTERNOON. BASED ON OBSERVATIONS FROM SNOTEL 
SITES...ACCUMULATIONS HAVE BEEN LESS THAN AN INCH.  SHOWERS WILL 
DECREASE FROM THE WEST TONIGHT.  BY SUNRISE SUNDAY...ONLY ISOLATED 
MOUNTAIN SHOWERS ARE EXPECTED.  THERE WILL BE BREAKS IN CLOUD COVER 
TONIGHT WHICH WILL LIKELY RESULT IN THE REFORMATION OF FOG AND 
STRATUS CLOUDS.  IT'S DIFFICULT TO SAY WHETHER WIDESPREAD DENSE FOG 
WILL DEVELOP AND BELIEVE IT COULD BE SIMILAR TO WHAT WAS OBSERVED 
THIS MORNING...I.E. AREAS OF FOG WITH VISIBILITIES BETWEEN 1-3 MILES 
AND LOCALLY LESS THAN 1 MILE.

A WEAK TRANSITORY RIDGE WILL FOLLOW ON SUNDAY WITH DRY CONDITIONS 
OVER MOST OF THE FORECAST AREA.  THE NEXT UPPER LOW TO BRING 
PRECIPITATION TO THE AREA WILL MOVE ONSHORE LATE SUNDAY NIGHT THEN 
OVER THE REMAINDER OF WA/OR MONDAY.  THE CENTER OF THE LOW WILL DIVE 
SOUTH INTO CALIFORNIA...THUS MOST PRECIPITATION WILL MAINLY DEVELOP 
OVER THE SOUTHERN HALF OF OREGON.  2-4 INCHES OF SNOW ACCUMULATIONS 
ARE FORECAST FOR THE EAST SLOPES OF THE OREGON CASCADES SUNDAY 
NIGHT.  IF MORE SNOW IS EXPECTED...A SNOW ADVISORY MAY BE REQUIRED.  
SNOW LEVELS SUNDAY NIGHT AND MONDAY MORNING WILL LOWER TO AROUND 
2000 FEET...THOUGH NO SIGNIFICANT ACCUMULATIONS ARE EXPECTED OVER 
THE REMAINDER OF THE REGION.  A SECONDARY UPPER LEVEL LOW WILL 
QUICKLY FOLLOW AND TAKE A SIMILAR TRACK ALONG THE WEST COAST MONDAY 
NIGHT AND TUESDAY.  A NORTHERLY FLOW BEHIND THE SECONDARY UPPER LOW 
WILL SPREAD DRIER AIR FROM THE NORTH.  BY TUESDAY...ISOLATED TO 
SCATTERED SNOW SHOWERS WILL FALL OVER THE MOUNTAINS WITH DRY 
CONDITIONS ELSEWHERE.  WISTER

LONG TERM...TUESDAY NIGHT THROUGH SATURDAY...A LOW PRESSURE SYSTEM 
WILL MOVE SOUTH OF THE AREA ON TUESDAY NIGHT BUT SHOWERS MAY PERSIST 
IN THE MOUNTAINS. THEN ON WEDNESDAY A RIDGE OF HIGH PRESSURE WILL 
BUILD INTO THE REGION AND SHOWERS WILL TAPER OFF. ON THURSDAY 
EVENING ANOTHER WEATHER DISTURBANCE WILL MOVE INLAND SPREADING RAIN 
AND SNOW EASTWARD THROUGH FRIDAY. UNSETTLED WEATHER IS LIKELY TO 
CONTINUE ON SATURDAY AS WELL. ALTHOUGH SEVERAL INCHES OF SNOW MAY 
FALL IN THE MOUNTAINS...WINTER WEATHER HIGHLIGHTS ARE NOT EXPECTED 
SINCE PRECIPITATION AMOUNTS SHOULD ONLY BE MARGINAL. TEMPERATURES 
THROUGHOUT THE PERIOD WILL BE NEAR SEASONAL NORMALS WITH DAYTIME 
HIGHS IN THE 40S.  TRIMARCO  

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  31  47  30  43 /  20   0  20  40 
ALW  35  48  33  45 /  20  10  10  40 
PSC  32  49  29  45 /  10   0  20  40 
YKM  26  45  28  44 /  10   0  30  40 
HRI  30  49  28  46 /  10   0  20  40 
ELN  27  44  28  42 /  10   0  30  50 
RDM  22  49  25  44 /  10   0  40  60 
LGD  30  46  28  43 /  30  10  10  40 
GCD  29  46  27  41 /  20  10  30  50 
DLS  31  50  32  47 /  10   0  40  50 

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

THREAT INDEX
SUNDAY : GREEN
MONDAY : GREEN
TUESDAY : GREEN

GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES.
YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.
RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/82/88

Northeastern Washington and Northern Idaho

341 
FXUS66 KOTX 120623
AFDOTX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1023 PM PST Sat Feb 11 2012

.SYNOPSIS...A moist organized storm system with mostly valley
rain and mountain snow will give way to a period of unsettled and
showery conditions through the weekend. Another potentially wetter
storm system will move through the area on Monday...with unsettled
and seasonably cool conditions through the rest of next week.




&&

.DISCUSSION...
Second Update issued to raise overnight low temperatures and raise
PoPs across portions of SE WA and the lower ID Panhandle. Light to
locally moderate showers continue across areas of Shoshone county
southward into the Camas Prairie where moisture profiles and weak
ascent remain in place from a waning TROWAL airstream. Further north 
in the Spokane area and Upper Columbia Basin, rainfall from this
afternoon coupled with midlevel drying has created a very juicy
boundary. Weak ascent from light w/sw flow 925-850 mb and
lingering deformation has created an environment of light to
locally moderate drizzle. All things considered, the environment
throughout the Inland NW will remain very saturated throughout the
night with a combination of fog, low clouds, and/or light
rain/snow found at most locations. /sb


&&

.AVIATION...
06Z TAFs: Rainfall from the last few days coupled with little to
no advection of dry air into the region will result in extremely
saturated boundary layer conditions and likelihood for
restrictions at all terminals. Fog, low clouds, and drizzle have
already settled into the Spokane-Coeur D Alene areas with -SHRA
and low clouds also impacting Pullman to Lewiston. Satellite
reveals the low clouds quickly approaching Moses Lake-Wenatchee.
There will be some improvement with the heating of the day Sun
aftn but confidence is low whether any particular site will break
out of MVFR cigs Sun aftn. /sb




&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        33  41  32  38  27  37 /  20  20  20  30  20  10 
Coeur d'Alene  33  40  32  38  28  38 /  60  20  20  40  30  10 
Pullman        33  43  31  40  31  38 /  30  20  10  50  50  30 
Lewiston       37  50  35  49  33  44 /  20  10  10  50  50  20 
Colville       32  40  30  40  23  40 /  10  20  20  20  20  10 
Sandpoint      33  39  30  38  28  37 /  40  30  30  30  30  20 
Kellogg        34  39  30  38  29  39 /  70  40  30  40  50  30 
Moses Lake     33  46  32  42  24  41 /  10   0  20  30  10  10 
Wenatchee      32  42  33  39  27  40 /   0   0  20  40  10  10 
Omak           33  38  30  39  21  38 /   0   0  20  20  10  10 

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.
&&

$$