Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 041100
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PST WED MAR 4 2015

.SHORT TERM...TODAY THROUGH FRIDAY NIGHT...A PRONOUNCED UPPER LEVEL
RIDGE OFF THE WEST COAST OFF NORTH AMERICA WILL TRANSLATE ESEWD AND
BE CENTERED OVER CALIFORNIA BY EARLY SATURDAY MORNING. THIS WILL
RESULT IN A QUITE BENIGN WEATHER PATTERN FOR THE INLAND NW THE NEXT
FEW DAYS. AFTER A VERY COLD START TEMPERATURES WILL WARM NICELY THIS
AFTERNOON WITH HIGHS IN THE 50S...40S MOUNTAINS. IT WILL BE COLD
AGAIN TONIGHT AND NUDGED FORECAST TEMPERATURES DOWN A BIT IN LINE
WITH LATEST GUIDANCE TO MOSTLY LOWER 20S WITH TEENS MOUNTAINS. ON
THURSDAY IT WILL BE WARMER IN THE AFTERNOON WITH HIGHS MID TO UPPER
50S LOWER ELEVATIONS AND NEAR 50 MOUNTAINS. MODELS ARE HINTING AT A
FEW HIGH CLOUDS LATER THURSDAY THROUGH FRIDAY NIGHT ESPECIALLY
CENTRAL AND NORTH. THIS WILL HELP KEEP TEMPERATURES UP THURSDAY
NIGHT TO AROUND 30 LOWER ELEVATIONS WITH 20S MOUNTAINS. FRIDAY WILL
BE A VERY NICE DAY EXCEPT FOR A FEW HIGH CLOUDS WITH AFTERNOON HIGHS
IN THE LOWER ELEVATIONS REACHING THE LOWER 60S. WITH SOME CLOUDS
FRIDAY NIGHT TEMPERATURES WILL BE MOSTLY IN THE 30S. WINDS WILL BE
LIGHT THROUGH THE PERIOD. 78

.LONG TERM...SATURDAY THROUGH TUESDAY NIGHT...A MID/UPPER LEVEL
RIDGE OF HIGH PRESSURE WILL PERSIST OVER THE FORECAST AREA THROUGH
MONDAY NIGHT FOR DRY CONDITIONS. ON MONDAY NIGHT THE GFS MODEL SHOWS
A MID/UPPER LEVEL TROUGH MOVING SOUTHEAST INTO THE RIDGE WHEREAS THE
ECMWF DOES NOT SHOW THIS FEATURE. CONFIDENCE IS NOT AS HIGH AS I
WOULD LIKE IN BRINGING THE TROUGH INTO THE INTERIOR PACIFIC
NORTHWEST GIVEN THE UNUSUAL STRENGTH AND PERSISTENCE OF THE
AFOREMENTIONED RIDGE OVER THE PAST THREE MONTHS. HOWEVER, THE ECMWF
CATCHES UP WITH THE GFS IN TERMS OF BRINGING A LARGER TROUGH INLAND
ON WEDNESDAY. AS SUCH I SPLIT THE DIFFERENCE AS INCREASED POPS FOR
TUESDAY NIGHT IN THE WESTERN SECTIONS OF THE FORECAST AREA BY
PAINTING CHANCE POPS ALONG THE EAST SLOPES OF THE WASHINGTON AND
OREGON CASCADES FOR TUESDAY NIGHT. SNOW LEVELS TUESDAY NIGHT WILL BE
ABOVE 6000 FEET.  POLAN

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WITH GENERALLY CLEAR SKIES ARE
EXPECTED OVER THE NEXT 24 HOURS. WINDS WILL REMAIN LESS THAN 10 KTS.
POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  25  56  31 /   0   0   0   0
ALW  52  29  55  35 /   0   0   0   0
PSC  53  22  57  30 /   0   0   0   0
YKM  52  24  55  31 /   0   0   0   0
HRI  54  20  57  28 /   0   0   0   0
ELN  51  23  52  31 /   0   0   0   0
RDM  53  17  59  23 /   0   0   0   0
LGD  47  22  52  26 /   0   0   0   0
GCD  48  21  53  26 /   0   0   0   0
DLS  56  27  59  34 /   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

$$

78/99/99







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