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FXUS66 KPDT 180958
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
158 AM PST Fri Jan 18 2019

.SHORT TERM...Today through Sunday...Latest water vapor imagery
shows an upper level ridge offshore which will build over the area
during the next 24 hours. this will push a warm front northward
across Oregon and Washington today and tonight with a weak cold
front following on Saturday. This will bring abundant rainfall and
high mountain snow to the region. Rain and mountain snow will
start in central Oregon by late morning with the precipitation
swath spreading northeastward during the afternoon and evening.
There could be 2-3 inches of snow in the central mountains and
into the Blue Mountains before snow levels quickly rise to 6-8
thousand feet. Rainfall amounts will be rather heavy tonight into
Saturday morning along the Oregon Cascade east slopes and Blue
mountains with amounts possibly exceeding 1 inch. This will lead
to rises on area rivers and streams. Snow levels will drop to
2500-4500 feet behind the cold front Saturday night and Sunday but
models are suggesting that the cold front will stall over south
central Oregon and begin to return northward late Saturday night
and Sunday. This will bring more rain and mountain snow. with the
lower snow levels there could be some travel impacts. A wind
Advisory is in effect this evening for Ladd and Pyles Canyons with
winds expected to peak during the overnight hours. 78


.LONG TERM...Sunday night through Friday. A weather system will
be exiting the region Sunday night with precipitation mainly over
Oregon and then decreasing to showers over the mountains on Monday.
A warm front will be moving into the area late Monday night and
Tuesday with snow levels around 3500 feet along the East Slopes of
the Washington Cascades and Blue Mountains with 4500-5000 feet along
the Oregon Cascades. Snow levels will remain at these levels
through Wednesday before the cold front moves through late
Wednesday. High pressure and drying conditions area expected
Thursday and Friday. It will be fairly mild through the week with
the warmest day expected Wednesday with highs about 3-5 degrees
above normal. 93

&&

.AVIATION...12Z TAFs...IFR cigs with MVFR vsby with fog will
persist through much of the day at DLS/YKM The next significant
system will enter from the southwest this afternoon, with -RA and
restrictions at RDM/BDN/ and spread northeast overnight. Winds will
be 8 to 14 kts with gusts to 20-25kts possible late today and
tonight, except light and variable at DLS/YKM.


.PRELIMINARY POINT TEMPS/POPS...
PDT 48 43 50 38 / 10 90 60 50
ALW 50 42 52 40 / 10 90 70 40
PSC 49 42 52 38 / 0 90 30 40
YKM 43 35 45 32 / 30 100 20 30
HRI 48 42 52 38 / 10 90 40 50
ELN 42 32 42 30 / 20 90 30 30
RDM 45 40 49 34 / 90 90 50 60
LGD 46 35 43 36 / 20 100 80 60
GCD 43 35 47 38 / 30 100 70 60
DLS 43 38 48 37 / 80 100 50 50

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Wind Advisory from 7 PM this evening to 10 AM PST Saturday for
ORZ049.

WA...None.
&&

$$

78/93/93
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