Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 310536 AAB
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1030 PM PDT SUN AUG 30 2015

UPDATED THE AVIATION DISCUSSION

.UPDATE...ALTHOUGH SOME RAIN SHOWERS WERE LINGERING OVER THE WA/OR
CASCADES...THE CLOUDS AND SHOWERS FROM EARLIER WERE MOVING AWAY FROM
THE REST OF THE AREA. A DISTURBANCE IS EXPECTED TO CLIP THE FAR NW
CWA AND THE CLOUDS AND SHOWERS WILL PERSIST ALONG AND NEAR THE EAST
SLOPES OF THE WA CASCADES. OTHERWISE DRIER AIR WAS FILTERING INTO
THE REMAINDER OF THE AREA AND THE FORECAST REPRESENTS THIS. OTHER
THAN A SLIGHT ADJUSTMENT TO OVERNIGHT TEMPERATURES THE PRESENT SHORT
TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...TAF SITE KRDM MAY EXPERIENCE SCT040 UNTIL 08Z...
OTHERWISE MAINLY VFR CONDITIONS WILL PERSIST ACROSS ALL TAF SITES
FOR THE NEXT 24 HOURS.

&&

.PREV DISCUSSION... /ISSUED 245 PM PDT SUN AUG 30 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  50  79  51  80 /   0  10   0  10
ALW  57  80  57  81 /   0  10   0  10
PSC  56  82  55  82 /   0  10   0  10
YKM  54  76  48  76 /  10  10  10  10
HRI  53  82  52  83 /   0  10   0  10
ELN  54  74  52  74 /  10  20  20  20
RDM  40  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  47  80  47  81 /  10  10   0   0
DLS  58  79  59  78 /  10  10  10  10

&&

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

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

$$

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