Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 201603
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
903 AM PDT SAT SEP 20 2014

.SHORT TERM...MORNING UPDATE...UPPER LEVEL HIGH PRESSURE WITH
OFFSHORE LOW LEVEL FLOW WILL PERSIST ACROSS THE REGION THROUGH
TONIGHT. AS SUCH EXPECT FAIR AND DRY CONDITIONS THROUGH TONIGHT.
SKIES WILL BE SUNNY TODAY AND CLEAR TONIGHT. WINDS WILL MAINLY BE
FROM THE NORTHEAST AND EAST TODAY. WINDS WILL BECOME TERRAIN DRIVEN
OVERNIGHT. HIGH TEMPS WILL RUN 10 TO 15 DEGREES ABOVE THE SEASONAL
AVERAGE. UPDATES THIS MORNING WERE LIMITED TO A FEW ADJUSTMENTS TO
HIGH TEMPS AND WINDS. 90

.LONG TERM...PREVIOUS DISCUSSION...THE LONG TERM PERIOD CONTINUES TO
SHOW A MAJOR PATTERN CHANGE ON WEDNESDAY AS A RIDGE OF HIGH PRESSURE
MOVES OUT OF THE AREA AND IS REPLACED BY A TROUGH OF LOW PRESSURE. A
WEAK SHORTWAVE TROUGH WILL PASS OVER THE AREA LATE TUESDAY NIGHT
BRINGING INCREASED CLOUDINESS AND A SLIGHT CHANCE OF THUNDERSTORMS
TO THE NORTHEAST OREGON MOUNTAINS. A MORE SIGNIFICANT TRANSITION
WILL OCCUR STARTING WEDNESDAY NIGHT AS A COLD FRONT IS EXPECTED TO
ARRIVE AND BRING A GOOD CHANCE OF RAIN TO THE FORECAST AREA. THE
UPPER LEVEL TROUGH WILL TAKE SOME TIME TO MOVE ACROSS THE AREA WITH
SHOWERS AREAWIDE AND AFTERNOON THUNDERSTORMS OVER THE NORTHEAST
OREGON MOUNTAINS CONTINUING THROUGH AT LEAST SATURDAY NIGHT.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...VFR CONDITIONS UNDER
HIGH PRESSURE WILL OCCUR WITH MOSTLY CLEAR SKIES AND WINDS AOB 15
KTS DURING THE TAF PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  87  55  87  58 /   0   0   0   0
ALW  88  60  89  64 /   0   0   0   0
PSC  88  55  90  58 /   0   0   0   0
YKM  84  55  91  58 /   0   0   0   0
HRI  89  52  91  56 /   0   0   0   0
ELN  86  53  93  59 /   0   0   0   0
RDM  87  47  88  48 /   0   0   0  10
LGD  85  46  88  50 /   0   0   0   0
GCD  87  49  89  51 /   0   0  10  10
DLS  89  56  91  59 /   0   0   0  10

&&

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

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

$$

90/98/85







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