Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 300211 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
700 PM PDT SAT AUG 29 2015

.UPDATE...A FEW SHOWERS WERE LINGERING OVER THE FAR EASTERN ZONES
WHILE A STORM SYSTEM WAS MOVING INTO THE PACNW AND SPREADING SHOWERS
TO THE WA/OR CASCADES. AS THE STORM SYSTEM MOVES INLAND THE SHOWERS
WILL SPREAD EAST INTO THE REMAINDER OF THE AREA LATER TONIGHT AND
INCREASE IN COVERAGE AND INTENSITY. THEREFORE THE ZONES WERE UPDATED
TO SPREAD THESE SHOWERS FURTHER EAST INTO PORTIONS OF THE BASIN
OVERNIGHT. OTHERWISE THE WINDS HAD DECREASED ACROSS THE
REGION AND THE WIND/DUST STORM ADVISORIES WERE ALLOWED TO EXPIRE
ALONG WITH THE RED FLAG WARNING. ALSO MINOR UPDATES WERE COMPLETED
TO THE SKY CONDITIONS AND THE PRESENT SHORT TERM FORECAST APPEARS ON
TRACK FOR NOW.

&&

.PREV DISCUSSION... /ISSUED 250 PM PDT SAT AUG 29 2015/

SHORT TERM...TONIGHT THROUGH MONDAY NIGHT...BREEZY TO LOW END WINDY
CONDITIONS CONTINUE ACROSS THE REGION. ALSO AREAS OF BLOWING DUST
MIXED WITH SMOKE CONTINUE TO REDUCE VISIBILITIES AT A FEW LOCATIONS
IN THE BASIN. THUS WILL ALLOW THE CURRENT WIND AND BLOWING DUST
ADVISORIES TO RUN UNTIL 6 PM. WILL CONTINUE TO SEE A FEW SHOWERS
OVER THE CASCADE EAST SLOPES, ESPECIALLY IN WASHINGTON, AND OVER
SOME OF OUR EASTERN ZONES INTO THE EVENING. STILL MAY BE ENOUGH
INSTABILITY FOR A STRAY THUNDERSTORM OVER WALLOWA COUNTY UNTIL
SUNSET. ANOTHER SYSTEM WILL MOVE ACROSS THE PACIFIC NORTHWEST
SUNDAY. THIS SYSTEM IS LOOKING TO BE A DECENT PRECIP PRODUCER AND
HAVE GONE WITH A WIDE SWATH OF 60-70 PERCENT POPS OVER THE AREA
SUNDAY, PRIMARILY DURING THE MORNING. WINDS WILL CONTINUE TO BE
BREEZY TO LOCALLY WINDY, THOUGH PRECIP SHOULD SIGNIFICANTLY REDUCE
CHANCES OF BLOWING DUST. THERE IS SOME INDICATION OF ENOUGH
INSTABILITY FOR STRAY THUNDERSTORMS OVER THE BLUE MOUNTAINS AND
WALLOWA COUNTY. AT THIS TIME WILL LEAVE OUT THE MENTION OF
THUNDERSTORMS AND WILL REEVALUTE THE POTENTIAL SUNDAY MORNING. FOR
SUNDAY NIGHT THROUGH MONDAY NIGHT, WILL SEE A BROAD UPPER LEVEL
TROUGH OVER THE REGION. THIS WILL KEEP A WEST-SOUTHWEST UPPER LEVEL
FLOW OVER THE REGION. MOISTURE WITHIN THIS FLOW WILL KEEP A FEW
SHOWERS GOING AT TIMES OVER THE WASHINGTON CASCADE EAST SLOPES.
OTHERWISE CONDITIONS LOOK TO DRY, COOL AND LOCALLY BREEZY. 90

LONG TERM...TUESDAY THROUGH SATURDAY...MODELS IN GOOD AGREEMENT IN
KEEPING AN UNSETTLED WEATHER PATTERN OVER THE PACIFIC NORTHWEST
THROUGH THE PERIOD. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
RAIN WILL BE WEDNESDAY/WEDNESDAY NIGHT AS AN UPPER LEVEL TROUGH
MOVES THROUGH THE AREA. NORTHWEST FLOW IS EXPECTED TO SLOWLY DEVELOP
BEHIND THE SYSTEM WITH CONDITIONS DRYING OUT MOST LOCATIONS...EXCEPT
THE EAST SLOPES OF THE CASCADES AND THE NORTHEAST MOUNTAINS OF
OREGON...SATURDAY. TEMPERATURES WILL REMAIN AT OR BELOW NORMAL
THROUGH THE PERIOD.  EARLE

AVIATION...00Z TAFS...VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24
HOURS AT ALL TAF SITES. HOWEVER...VISIBILITIES MAY OCCASIONALLY DROP
TO MVFR BEHIND A FRONT THROUGH 30/03Z DUE TO SMOKE AND BLOWING DUST.
LIGHT RAIN WILL DEVELOP LATE TONIGHT AND CONTINUE FOR 2-4 HOURS AT
EACH SITE. WIND WILL BE 10-20 KTS WITH GUSTS APPROACHING 30 KTS
THROUGH EARLY EVENING. THE WIND WILL DECREASE OVERNIGHT BUT INCREASE
TO 10-20 KTS AFTER 30/14Z.  EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  51  78 /  10  60  10  10
ALW  61  74  56  78 /  10  60  10  10
PSC  59  77  55  82 /  20  60  10  10
YKM  53  70  49  74 /  50  40  10  10
HRI  57  76  52  81 /  10  60  10  10
ELN  53  71  51  75 /  60  40  10  20
RDM  49  68  39  77 /  20  60  10  10
LGD  48  68  45  77 /  20  50  10  10
GCD  46  71  42  78 /  20  40  10  10
DLS  60  75  56  79 /  60  60  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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