Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 270920
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
219 AM PDT Thu Apr 27 2017

.SHORT TERM...Today through Saturday...Northwest upper level flow
will persist through the period as a ridge builds offshore. A wave
in the northwest flow will increase showery precipitation over the
mountains and Oregon this afternoon. Upslope regions of the eastern
mountains will get the most rain/snow. Snow levels are around 2500-
3000 ft this morning. The showery precipitation may produce a few
inches of snow in the mountains. Gusty W-NW winds will persist until
early evening. Wind Advisories continue for the Kittitas Valley and
Simcoe Highlands for gusty W-NW winds. Friday a drier northerly flow
will develop with decreasing chances for mountain showers. The ridge
will eventually move over the Pacific Northwest on Saturday for a
warmer dry day.  Coonfield

.LONG TERM...Saturday night through Wednesday...Models in
good agreement in moving a system across the area Saturday night and
Sunday.  Showers will begin Saturday night over our western CWA and
spread eastward through the day on Sunday. By Monday an upper level
ridge is expected to begin nosing into southwest Oregon.  The upper
ridge is expected to strengthen slowly through Wednesday resulting
in warmer temperatures and a drying trend.  Both GFS and ECMWF do
hint at bringing showers over the area Tuesday, but find this hard
to believe given strengthening ridge so have left the forecast dry.
Earle

&&

.AVIATION...06z tafs (previous discussion). Sct-bkn 050-080 tonight
into Thursday. Isolated showers mostly over the mountains. Winds 15-
30kt.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  56  36  58  37 /  10  10  10   0
ALW  59  41  60  41 /  20  20  10   0
PSC  63  40  65  37 /  10  10  10   0
YKM  61  36  64  35 /  10  10  10   0
HRI  61  40  63  36 /  10  10  10   0
ELN  55  37  59  35 /  10  10  10   0
RDM  52  25  54  23 /  20  20  10   0
LGD  49  35  53  33 /  40  20  20  10
GCD  47  28  51  23 /  50  50  10   0
DLS  59  42  62  40 /  10  10  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...Wind Advisory until 9 PM PDT this evening for WAZ026-521.

&&

$$

76/81/81


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