000
FXUS66 KPDT 161735 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1035 AM PDT WED APR 16 2014

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...UPDATE...A WEAK UPPER LEVEL HIGH PRESSURE RIDGE OFF
THE PACIFIC NORTHWEST COAST WILL SLOWLY SHIFT EAST TODAY. AS SUCH A
WEAK WARM FRONT WILL GRADUALLY LIFT NORTH AND NORTHEAST THROUGH THE
REGION. THIS WARM FRONT WILL BRING MOSTLY CLOUDY SKIES WITH LOW END
CHANCES OF PRECIP TO A LARGE PORTION OF OUR AREA. AREAS NEAR AND
JUST EAST OF THE WASHINGTON CASCADE CREST WILL SEE BETTER CHANCES OF
PRECIP. CURRENT FORECAST PACKAGE IS GENERALLY IN GOOD SHAPE. DID
ADJUST POPS IN A FEW AREAS. POPS WERE INCREASED IN THE BLUE
MOUNTAINS AND DECREASED ACROSS CENTRAL OREGON AND THE JOHN DAY-
OCHOCO HIGHLANDS. ADJUSTMENTS WERE ALSO MADE TO SKY COVER, SNOW
LEVELS AND AFTERNOON HIGH TEMPS. 90

.LONG TERM...PREVIOUS DISCUSSION...A FLAT RIDGE WILL PASS OVER
WASHINGTON AND OREGON FRIDAY NIGHT AND SATURDAY...FOLLOWED BY A
SOUTHWEST FLOW ALOFT SUNDAY. SUBSIDENCE FROM THE RIDGE WILL KEEP
TEMPERATURES WARM SATURDAY AND SUNDAY. WEAK IMPULSES MOVING THROUGH
THE SOUTHWEST FLOW MAY TRIGGER A FEW SHOWERS IN THE CASCADES
SATURDAY NIGHT AND SUNDAY. ANOTHER FRONT WILL MOVE THROUGH EASTERN
WASHINGTON AND OREGON SUNDAY NIGHT AND MONDAY WITH SHOWERS OVER MOST
OF THE AREA. MONDAY NIGHT AND TUESDAY THE GFS HAS A CUTOFF LOW
DEVELOPING OVER NORTHERN CALIFORNIA AND ECMWF HAS AN ELONGATED
TROUGH NEAR THE COAST. BOTH OF THESE SOLUTIONS WILL PRODUCE SHOWERS
OVER EASTERN WASHINGTON AND OREGON.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS ARE FORECAST FOR THE NEXT 18
HOURS WITH POSSIBLE MVFR CONDITIONS AT KDLS AND KYKM IN THE LAST 6
HOURS OF THE TAF PERIOD.  CIGS WILL RANGE FROM 5000-10,000 FEET AGL
THIS MORNING AND EARLY AFTERNOON. WINDS WILL BE 5 TO 15 KNOTS
THROUGH THE PERIOD. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  61  44  63  42 /  20  10  70  80
ALW  62  47  64  46 /  20  10  70  80
PSC  66  49  64  44 /  20  10  60  60
YKM  62  43  61  41 /  30  20  60  20
HRI  65  45  63  43 /  20  10  60  60
ELN  59  43  59  41 /  40  20  60  30
RDM  60  34  59  31 /  10   0  60  30
LGD  57  38  65  43 /  20  10  30  80
GCD  58  35  64  39 /  20  10  30  70
DLS  63  47  61  43 /  30  20  60  30

&&

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

THREAT INDEX
TODAY : GREEN
THURSDAY : GREEN
FRIDAY : 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

$$

90/76/89