Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 070934
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
134 AM PST SUN FEB 7 2016

.SHORT TERM...TODAY THOUGH TUESDAY...A WARM FRONT AHEAD OF AN UPPER
RIDGE WILL LIFT NORTHWARD ACROSS THE CWA TODAY. MOISTURE IS VERY
LIMITED AND SPOTTY PRECIPITATION IS ONLY EXPECTED TO OCCUR ALONG THE
SOUTHERN WASHINGTON CASCADE EAST SLOPES AND OVER THE NORTHEAST
OREGON/SOUTHEAST WASHINGTON MOUNTAINS. PRECIPITATION AMOUNTS WILL BE
VERY LIGHT. SNOW LEVELS WILL BE RISING AS THE WARM FRONT PASSES FROM
4000 FEET NORTHEAST TO 7000 FEET SOUTHWEST IN THE MORNING...
INCREASING TO NEAR 6000 FEET NORTHEAST TO AROUND 8000 FEET SOUTHWEST
AREAS OF THE CWA BY THIS EVENING. THEREFORE PRECIPITATION TYPE WILL
BE RAIN EXCEPT FOR THE HIGHEST PEAKS THAT ARE WELL ABOVE PASS
LEVELS. ONCE THIS FRONT LIFTS TO THE NORTH OF THE CWA OVERNIGHT
TONIGHT A STRONG UPPER HIGH PRESSURE RIDGE WILL BUILD INTO THE
REGION AND STRENGTHEN. THIS WILL PROVIDE DRY CONDITIONS WITH LIGHT
WINDS AND MILD TEMPERATURES WITH A WARMING TREND FOR THE REMAINDER
OF THE SHORT TERM FORECAST PERIOD. THERE WILL LIKELY BE LATE NIGHT
AND MORNING PATCHY FOG IN THE LOWER COLUMBIA BASIN AND ADJACENT
VALLEYS BEGINNING TONIGHT. THE FOG WILL SLOWLY SPREAD AREA WISE ON
MONDAY NIGHT AND TUESDAY NIGHT TO INCLUDE MORE VALLEYS. THROUGH IT
IS GETTING LATE IN THE FOG SEASON THE FOG AND/OR LOW STRATUS MAY
PERSIST THROUGH THE DAY IN THE LOWER COLUMBIA BASIN BY TUESDAY WHICH
WILL HOLD TEMPERATURES DOWN IN THOSE AREAS. THUS THE GREATEST
WARMING TREND WILL BE IN THE HIGHER ELEVATIONS. 88

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...AN UPPER LEVEL RIDGE
WILL BE OVER THE REGION THROUGH THURSDAY WITH MOSTLY DRY AND WARM
WEATHER EXCEPT FOR PATCHY VALLEY FOG. THERE IS SOME INDICATION THAT
THE RIDGE MAY BEGIN TO BREAK DOWN ON FRIDAY WITH MULTIPLE STORM
SYSTEMS IMPACTING THE REGION THROUGH NEXT WEEKEND. SNOW LEVELS WILL
START OUT HIGH...MAINLY 7000 FEET OR HIGHER...BUT LOWER TO AROUND 4-
5 THOUSAND FEET BY SUNDAY. AT THE PRESENT TIME IT DOES NOT APPEAR
THAT THESE STORM SYSTEMS WILL EXCEED MODERATE INTENSITY. WINDS WILL
GENERALLY BE LIGHT THROUGH THE FORECAST PERIOD.

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL TODAY INTO THIS
EVENING. SOME MID AND A FAIR AMOUNT OF HIGH CLOUDS ARE EXPECTED
TODAY AND TONIGHT. WINDS WILL BE LIGHT AND VRBL. AFTER 06Z MONDAY
PATCHY FOG WILL DEVELOP AT ALL THE TAF SITES EXCEPT KBDN AND KRDM
RESULTING IN MVFR/IFR CIGS AND VSBYS. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  34  53  35 /   0   0   0   0
ALW  49  36  51  37 /   0   0   0   0
PSC  50  34  46  34 /   0   0   0   0
YKM  48  32  49  33 /   0   0   0   0
HRI  50  34  46  34 /   0   0   0   0
ELN  41  30  44  30 /  10   0   0   0
RDM  53  35  57  35 /   0   0   0   0
LGD  46  34  49  35 /  10   0   0   0
GCD  49  32  50  33 /   0   0   0   0
DLS  54  37  52  37 /  10   0   0   0

&&

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

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

$$

88/78/78


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