Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 251453
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
753 AM PDT FRI JUL 25 2014

.SHORT TERM...TODAY THROUGH SATURDAY...WEATHER PATTERN WILL BEGIN TO
TRANSITION FROM A DRY FLAT WESTERLY FLOW TO A RIDGE OF HIGH PRESSURE
OVER THE REGION. THIS WILL LEAD TO A WARMING TREND OF AROUND 4 TO 8
DEGREES TODAY AND ANOTHER 5 DEGREES OR SO ON SATURDAY. SKIES WILL
REMAIN CLEAR AND WINDS WILL BE GENERALLY LIGHT ACROSS THE FORECAST
AREA.


&&

.PREV DISC... /ISSUED 420 AM PDT FRI JUL 25 2014/

SHORT TERM...TODAY THROUGH SUNDAY...A QUIET WEATHER PATTERN WILL
DOMINATE THE SHORT TERM PERIOD. A 4 CORNERS HIGH PRESSURE RIDGE WILL
CONTINUE TO BUILD TO THE NORTHWEST OVER THE NEXT FEW DAYS. THIS WILL
BRING ABOUT A WARMING TREND WITH DRY CONDITIONS AND LOW HUMIDITY.
HOWEVER...THERE WILL BE SOME INCREASE IN MID LEVEL MOISTURE ON
SUNDAY FROM THE SOUTH AS THE FLOW BECOMES MORE SOUTHWEST ON THE WEST
SIDE OF THE UPPER RIDGE. THE AMOUNT OF MOISTURE WILL BE VERY
LIMITED. HOWEVER...THERE MAY BE ENOUGH OF IT TO WARRANT A MENTION OF
ISOLATED THUNDERSTORMS SUNDAY AFTERNOON OVER CENTRAL OREGON AND THE
CENTRAL OREGON CASCADE EAST SLOPES. ANY THUNDERSTORMS ARE EXPECTED
TO BE VERY ISOLATED. IF ANY DOES FORM PRECIPITATION AMOUNTS WILL BE
VERY LIGHT IF ANY. THIS MAY CAUSE FIRE WEATHER CONCERNS FOR SUNDAY
AFTERNOON AND EVENING OVER CENTRAL OREGON. WILL BRIEF THE DAY SHIFT
AND FIRE WEATHER SHIFT ON THIS SCENARIO. IN THE MEAN TIME THERE WILL
BE A SIGNIFICANT WARMING TREND THROUGH THE PERIOD WITH TODAY TOPPING
OUT IN THE 80S (70S MOUNTAINS)...WARMING TO THE MID 90S (80S IN THE
MOUNTAINS) BY SUNDAY AFTERNOON. THE WARMING TREND WILL CONTINUE INTO
THE EXTENDED PERIOD. WINDS WILL GENERALLY BE LIGHT THROUGH THE SHORT
TERM PERIOD. 88

LONG TERM...SUNDAY NIGHT THROUGH THURSDAY...AN UPPER LEVEL RIDGE
WILL PERSIST OVER THE WESTERN THIRD OF THE COUNTRY NEXT WEEK.
SUBSIDENCE FROM THE RIDGE WILL BRING SOUTH TO SOUTHWEST FLOW AND HOT
TEMPERATURES TO THE REGION. HIGHS WILL BE IN THE 90S FOR MANY
LOCATIONS WITH THE COLUMBIA BASIN AROUND 100. MONSOON MOISTURE MAY
MOVE AROUND THE BACKSIDE OF THE RIDGE AT TIMES. AFTERNOON AND
EVENING THUNDERSTORMS MAY DEVELOP AS MOIST UNSTABLE FLOW COMBINES
WITH DAYTIME HEATING. MOISTURE WILL BE LIMITED PARTICULARLY AT LOWER
LEVELS. BASED ON THIS ONLY ISOLATED THUNDERSTORMS ARE
POSSIBLE...MAINLY OVER THE HIGHER TERRAIN OF CENTRAL AND NORTHEAST
OREGON.  COONFIELD

AVIATION...12Z TAFS...DRY WEST FLOW ALOFT WILL KEEP CONDITIONS VFR
AND MOSTLY CLEAR THROUGH THE NEXT 24 HOURS. A FEW AFTERNOON CUMULUS
MAY DEVELOP FRIDAY NEAR KBDN, KRDM AND KYKM. WINDS WILL MAINLY BE 10
KTS OR LESS. THE EXCEPTION WILL BE AT KDLS WHERE WINDS WILL BE
GUSTIER DURING THE AFTERNOON AND EARLY EVENING. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  83  52  89  61 /   0   0   0   0
ALW  83  59  90  66 /   0   0   0   0
PSC  87  58  92  63 /   0   0   0   0
YKM  83  52  88  61 /   0   0   0   0
HRI  85  55  92  61 /   0   0   0   0
ELN  81  51  86  56 /   0   0   0   0
RDM  82  43  87  51 /   0   0   0   0
LGD  79  48  86  56 /   0   0   0   0
GCD  81  51  89  58 /   0   0   0   0
DLS  84  57  90  63 /   0   0   0   0

&&

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

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

$$

91/82/82








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