Area Forecast Discussion
Issued by NWS Pendleton, OR

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231
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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