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fxus66 kpdt 202047 
afdpdt

Area forecast discussion
National Weather Service Pendleton or
146 PM PDT Thu Sep 20 2018

Short term...tonight through Sunday...a weak warm front will
arrive onshore late this afternoon/this evening with little more
than increasing mid-level cloudiness expected outside of some light
rain for the very northernmost sections of our Washington Cascades.
Should see a better chance for some rain all along the Cascades
Saturday with the approach of a cold front with a tenth to perhaps a
third of an inch of accumulation through Sunday morning. Further
east into The Blues models suggest decent mid-level forcing and
moisture along the effective front Saturday but given 10000 ft cloud
bases and 10 to 15 degree dewpoint depressions in the sub cloud
layer will struggle to see much more than a few hundreths of
accumulation from any rain here. This system looks to be the Last
Chance for precipitation before an extended period of dry
northwesterly flow beginning Sunday afternoon. Temperatures will be
near 80 degrees tomorrow with the area in the warm sector south of
the warm front, dropping back to near normal values Saturday and
Sunday behind the cold front. Prefrontal winds will begin to
increase late Friday afternoon as gradients begin to tighten across
the Cascades with continued breeziness on Saturday behind the front
before eventually tapering off on Sunday.

Long term...Sunday night through Thursday...there currently is
fairly good agreement between the mid range models that an upper
ridge will be off the West Coast during this period. As such expect
a dry northwest flow over the Pacific northwest. Thus will keep the
forecast dry with mainly clear skies. Temps should gradually warm
through the period as the upper ridge axis looks to slowly shift
towards the coast. 90

&&

Aviation...previous discussion...18z tafs...westerly flow will
persist through the next 24 hours. Varying amounts of mid and high
level cloudiness will move across the region during this period.
Winds will mainly be 10 kts or less, though gustier winds are
expected this afternoon at kdls. 90

&&

Preliminary point temps/pops...
PDT 47 79 54 72 / 0 0 0 10
alw 51 80 57 73 / 0 0 0 10
psc 50 82 57 76 / 0 0 10 10
ykm 47 78 50 72 / 10 0 10 0
hri 48 81 56 75 / 0 0 10 10
eln 47 77 49 69 / 10 0 20 10
rdm 39 81 45 70 / 0 0 10 10
lgd 42 80 48 70 / 0 0 0 20
gcd 44 81 48 72 / 0 0 0 10
dls 51 80 56 72 / 0 0 20 10

&&

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

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