000
FXUS66 KPDT 272332 AAA
AFDPDT
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
432 PM PDT WED AUG 27 2008
UPDATED AVIATION DISCUSSION
.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...THE WEATHER DISTURBANCE
THAT BROUGHT LIGHT SHOWERS TO THE NORTHEAST MOUNTAINS HAS MOVED
EAST...WITH THE AREA UNDER A NORTHWEST FLOW. PARTLY TO MOSTLY CLOUDY
SKIES CONTINUE THIS AFTERNOON...WITH SOME WAVE CLOUDS ALONG THE
MOUNTAINS. CONDITIONS ARE BREEZY TO WINDY ACROSS MUCH OF THE AREA
WITH GUSTY WINDS ALONG THE CASCADES. THESE CONDITIONS ARE EXPECTED
TO CONTINUE INTO THIS EVENING BEFORE DECREASING AS PRESSURE
GRADIENTS RELAX. WESTERLY FLOW WITH WEAK HIGH PRESSURE WILL BE OVER
THE AREA ON THURSDAY WITH A WEATHER DISTURBANCE STAYING TO THE
NORTH. THIS WILL ONLY BRING SOME CLOUDS TO THE NORTHERN PORTION OF
THE AREA TOMORROW. SKIES WILL THEN CLEAR BY FRIDAY AS THE RIDGE
MOVES EAST AND THE AREA TRANSITIONS TO A SOUTHWESTERLY FLOW. A LOW
PRESSURE SYSTEM IN THE GULF OF ALASKA WILL MOVE EAST AND INTO
CENTRAL BRITISH COLUMBIA WITH A WEAK COLD FRONT MOVING INLAND FRIDAY
NIGHT. MODELS DISAGREE ON THE EXACT TIMING OF THE FRONT...WITH THE
GFS MODEL BRINGING IT THROUGH FRIDAY NIGHT INTO SATURDAY...WHILE THE
NAM BRINGS THE FRONT THROUGH ON SATURDAY. HAVE GONE WITH THE SLOWER
SOLUTION...BRINGING THE FRONT TO THE CASCADES BY FRIDAY NIGHT. THIS
WILL BRING A SLIGHT CHANCE OF PRECIPITATION ALONG THE CASCADES. DMH
.LONG TERM...SATURDAY THROUGH WEDNESDAY...A DRY COLD FRONT WILL MOVE
THROUGH THE FORECAST AREA ON SATURDAY. IN THE AFTERMATH OF THE FRONT
MORNING LOW TEMPERATURES ON MONDAY AND TUESDAY WILL DIP DOWN TO THE
LOWER 30S IN THE MOUNTAINS AND HIGH DESERT. AN UPPER LEVEL LOW WILL
DROP SOUTHWARD OUT OF BRITISH COLUMBIA INTO THE PACIFIC NORTHWEST ON
SUNDAY INTRODUCING A SLIGHT CHANCE OF SHOWERS ON SUNDAY AND MONDAY
IN THE MOUNTAINS OF CENTRAL AND NORTHEAST OREGON AND THE BLUE
MOUNTAINS OF SOUTHEAST WASHINGTON. THEN HIGH PRESSURE BUILDS OVER
THE REGION FOR DRY AND STABLE CONDITIONS THROUGH WEDNESDAY. POLAN
&&
.AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
FOR THE NEXT 24 HOURS. BREEZY WINDS WILL CONTINUE THROUGH THIS
AFTERNOON AND INTO THIS EVENING UNTIL AROUND 04Z. WIND GUSTS OF 25
TO 30 KTS MAY OCCUR UNTIL 02Z AT TAF SITES. MVFR CONDITIONS WILL
CONTINUE AT KALW UNTIL 04Z DUE TO BLOWING DUST. WINDS WILL BEGIN
SUBSIDING BY AROUND 04Z AND DIMINISH OVERNIGHT. WINDS WILL INCREASE
SOMEWHAT THURSDAY AFTERNOON AT TAF SITES AND WILL BE UPSLOPE FROM 5
TO 10 KNOTS. POLAN
&&
.PRELIMINARY POINT TEMPS/POPS...
PDT 52 84 58 89 / 0 0 0 0
ALW 55 84 62 89 / 0 0 0 0
PSC 54 86 59 91 / 0 0 0 0
YKM 50 83 55 87 / 10 0 0 0
HRI 50 86 56 90 / 0 0 0 0
ELN 52 82 56 85 / 10 10 0 10
RDM 38 85 45 88 / 0 0 0 0
LGD 46 81 49 88 / 0 0 0 0
GCD 47 85 50 90 / 0 0 0 0
DLS 54 85 58 87 / 0 0 0 0
&&
.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&
$$
TI:GGG
FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON
84/99/99
