Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 022110
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
210 PM PDT THU JUL 2 2015

.SHORT TERM...TONIGHT THROUGH SUNDAY...HIGH PRESSURE WILL CONTINUE
TO DOMINATE THE WEATHER PATTERN THROUGHOUT THIS TIME PERIOD
PRODUCING ABOVE NORMAL TEMPERATURES. THERE WILL BE AN UPPER LEVEL
LOW PRESSURE SYSTEM SETTLING OVER WESTERN AND CENTRAL CANADA
SATURDAY AND SUNDAY THAT WILL HAVE THE MINOR IMPACT OF SLIGHTLY
LOWERING TEMPERATURES. EXPECT ANOTHER DAY OF NEAR RECORD HIGH
TEMPERATURES ON FRIDAY BUT THEN SOME GRADUAL COOLING OVER THE
WEEKEND. HIGH TEMPERATURES WILL FALL BACK INTO THE 90S TO AROUND 100
ACROSS THE LOWER COLUMBIA BASIN SATURDAY AND SUNDAY WHICH IS STILL
10 O 15 DEGREES ABOVE NORMAL. WILL NEED TO WATCH SOME MOISTURE
CREEPING UP INTO SOUTHERN OREGON ON SUNDAY AS SOME OF THIS COULD
INFRINGE ON CENTRAL OREGON IN THE FORM OF THUNDERSTORMS. AT THIS
POINT IT APPEARS THE MORE ABUNDANT MOISTURE WILL REMAIN SOUTH OF THE
FORECAST AREA.


.LONG TERM...SUNDAY NIGHT THROUGH THURSDAY NIGHT...VERY WARM/HOT
TEMPERATURE ARE EXPECTED TO CONTINUE THROUGH THE EXTENDED...AS A
FOUR CORNERS HIGH CONTINUES TO HOLD WITH VERY LITTLE MOVEMENT.
THERE WILL BE A SLIGHT CHANCE FOR THUNDERSTORMS ACROSS CENTRAL
OREGON EACH DAY...AS A LOW PRESSURE SYSTEM OFF THE CALIFORNIA COAST
ATTEMPTS TO SPIN UP MID LEVEL MOISTURE AND INSTABILITY TO THE AREA.
ALL OTHER AREAS CAN EXPECT CONTINUED DRY CONDITIONS WITH MOSTLY
CLEAR SKIES.  MODELS HAVE THE LOW SLOWLY PROGRESSING FURTHER INLAND
EACH DAY...BUT IS STILL INDICATING THAT A NORTHWEST FLOW WILL CUT OF
MUCH OF THE INSTABILITY NORTH OF DESCHUTES...CROOK...AND GRANT
COUNTY.  EXPECT HIGH TEMPERATURES TO BE LOWER 90S TO AROUND 100 FOR
THE LOWER ELEVATIONS WITH UPPER 70S TO UPPER 80S MOUNTAINS.
OVERNIGHT LOWS ARE EXPECTED TO BE WARM AND CONTINUE IN THE 60S FOR
THE LOWER ELEVATIONS AND THE MID 50S TO LOWER 60S MOUNTAINS. WEBER


&&

.AVIATION...00Z TAFS...CLEAR SKIES FOR THE NEXT 24 HOURS EXCEPT SCT
CUMULUS AND CIRRUS AT KRDM AND KBDN TODAY. SURFACE WINDS 5-15 KTS.
WEBER


&&

.FIRE WEATHER...CURRENT FIRE WEATHER WATCHES WILL BE UPGRADED TO RED
FLAG WARNINGS FOR WIND AND LOW RELATIVE HUMIDITY.  THIS MAINLY
COVERS THE EASTERN COLUMBIA RIVER GORGE, THE YAKIMA VALLEY AND
SOUTHERN KITTITAS VALLEY, THE HANFORD DISTRICT, AND NORTH CENTRAL
AND CENTRAL OREGON. WE ARE NOT ANTICIPATING A STRONG WIND EVENT. THE
KITTITAS VALLEY AND THE EASTERN COLUMBIA RIVER WILL OBSERVE BREEZY
WINDS FRIDAY AFTN/EVE AND AGAIN SAT AFTN/EVE AND 10-20 MPH WINDS CAN
BE EXPECTED ELSEWHERE.  DAYTIME RH VALUES WILL RANGE FROM 8-18
PERCENT...AND VEGETATION IS VERY DRY.  IT TAKES LITTLE WIND TO CAUSE
RAPID FIRE SPREAD. A NORTHERLY GRADIENT WILL SET UP OVER NORTHEAST
WASHINGTON SATURDAY AFTERNOON WITH THE STRONGEST WINDS NORTH OF OUR
FORECAST AREA.  THE WINDS WILL SHIFT FROM THE NORTHWEST TO NORTH IN
THE YAKIMA VALLEY AND FROM THE TRI-CITES NORTHWARD ON SATURDAY
NIGHT. IT WILL BE LOCALLY BREEZY DURING THIS TIME...THEREFORE THE
RED FLAG WARNING FOR FIRE ZONE 675 (YAKIMA VALLEY AND HANFORD
DISTRICT) WILL CONTINUE THROUGH SUNDAY MORNING.  WISTER


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  67 103  67  99 /   0   0   0   0
ALW  73 104  73 100 /   0   0   0   0
PSC  69 106  68 102 /   0   0   0   0
YKM  68 100  69  97 /   0   0   0   0
HRI  68 104  69 101 /   0   0   0   0
ELN  65 103  65  99 /   0   0   0   0
RDM  61  98  57  95 /   0   0   0   0
LGD  58  97  59  94 /   0   0   0   0
GCD  62 101  59  98 /   0   0   0   0
DLS  72 101  69  99 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING FROM NOON FRIDAY TO 8 PM PDT SATURDAY FOR
     ORZ639.

     HEAT ADVISORY UNTIL 8 PM PDT THIS EVENING FOR ORZ041-510-511.

     HEAT ADVISORY UNTIL 8 PM PDT FRIDAY FOR ORZ044-507.

     RED FLAG WARNING FROM 3 PM FRIDAY TO 8 PM PDT SATURDAY FOR
     ORZ610-640-641.

WA...RED FLAG WARNING FROM NOON FRIDAY TO 8 PM PDT SATURDAY FOR
     WAZ639.

     HEAT ADVISORY UNTIL 8 PM PDT THIS EVENING FOR WAZ024.

     RED FLAG WARNING FROM 3 PM FRIDAY TO 9 AM PDT SUNDAY FOR WAZ675.

     HEAT ADVISORY UNTIL 8 PM PDT FRIDAY FOR WAZ026>029.

&&

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

$$

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