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Area forecast discussion 
National Weather Service Pendleton or
941 am PST Sat Jan 31 2015

Short term...morning update...weakening upper level high pressure
will remain over the through tonight. As such low level inversions
will continue to trap low clouds and fog over portions of the area.
Expect to see better clearing today above 2500 feet mean sea level in central
Oregon due a weak system moving over the area. Expect the low clouds
and patchy fog to hold over the Columbia Basin. The weak system will
cause some patchy drizzle this morning, especially over the Oregon
Blue Mountain foothills. Updates this morning focused on adjustments
to fog locations, sky cover and high temperatures. Also made some minor
adjustments to winds through tonight. 90

Long term...previous discussion...a weather system will be moving
east of the area Monday night with just a few lingering mountain
showers. On Tuesday into Wednesday the GFS and European model (ecmwf) disagree on the
weather pattern. The European model (ecmwf) lifts a warm front through the area with
abundant rainfall and perhaps some snow along the Washington
Cascades...while the GFS keeps the area dry. Have trended the
forecast a bit toward the European model (ecmwf) which has been consistent from run
to run but only went chance probability of precipitation for now. If the European model (ecmwf) is correct
could see probability of precipitation eventually being raised to likely category. By late
Thursday into Saturday a moist southwesterly flow aloft will bring several
periods of moderate to heavy rain to the area. Although the details
with regard to timing are a bit sketchy could see 2-3 inches of rain
in the mountains and .5 to 1 inches of rain in The Lowlands. Could
also be windy Friday into Saturday with gusty south winds possibly
reaching advisory levels.

&&

Aviation...18z tafs...areas of MVFR ceilings and visibility are likely
with local IFR conditions across most tafs sites especially at kpdt
and kalw. Elsewhere local MVFR ceilings can be expected although taf
site krdm may experience VFR conditions at times today. After 02z all
taf sites could experience areas of MVFR and local IFR conditions.

&&

Preliminary point temps/pops...
PDT 36 31 42 36 / 0 10 30 40
alw 39 33 41 38 / 0 10 40 40
psc 41 32 42 36 / 10 10 30 30
ykm 38 32 39 31 / 0 10 30 30
hri 41 32 43 36 / 0 10 30 30
eln 38 30 40 31 / 0 10 40 40
rdm 50 28 50 34 / 0 10 30 30
lgd 46 27 42 34 / 0 0 40 50
gcd 45 25 46 32 / 0 10 30 50
dls 43 35 45 39 / 0 10 40 40

&&

PDT watches/warnings/advisories...
or...none.
Washington...none.
&&

For additional weather information, check our web site at...
www.Weather.Gov/Pendleton

$$

90/78/97

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