Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 300954
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
254 AM PDT Mon Mar 30 2020

.SHORT TERM...Today through Wednesday night. Strong upper level
trough and jet moving into the Pacific northwest. Radar and
satellite showing cold front moving onshore early this morning.
This front will cross the forecast area during the morning and
early afternoon with rain likely. Surface gradients and winds
aloft are strong and expect increasing winds. Southerly winds this
morning ahead of the front becoming westerly by afternoon. Expect
widespread 20-35 mph winds with some locations having 40-50 mph
gusts. Winds will diminish later in the evening and advisories
will be in effect through 7pm. Current snow levels are 4-5k feet
however these will lower to 2-3k late this evening and overnight.
Based on this precipitation will be mostly rain through early
afternoon becoming rain and mountain snow by evening into the
overnight period. For Tuesday and Wednesday an upper level trough
will remain over the region. Skies will be mostly cloudy with
occasional rain and mountain snow. Temperatures will be cooler
with highs in the 40s to mid 50s. Breezy westerly winds 10-25 mph
each day. Persistent west to northwest flow aloft with the cooler
airmass tonight into Tuesday will result in snow accumulations for
the mountains. Winter weather advisories remain in effect. 94

.LONG TERM...Thursday through Monday...Models are in fairly good
agreement for the long term with long wave troughing over the
western US with a main upper low meandering over western Canada.
Deterministic solutions and model ensembles trending towards a
persistent, moist west to northwest flow through the Pacific
Northwest with a series of shortwaves embedded in the flow passing
over the region. Expect a chance of low elevation rain and mountain
snow showers most days, especially over the weekend as a duo of
stronger waves pass over the Inland NW. Have trended cooler temps
from previous runs as models starting to keep lower heights over the
region. Expect afternoon temps in the 40s and 50s.

&&

.AVIATION...12Z TAFs...Mainly VFR conditions expected through the
period. Another weather system will move into the region today and
tonight and bring more widespread showers and increasing winds.
Can`t rule out potential for a few thunderstorms, as well as small
hail. Conditions will become MVFR, to possibly IFR, at times under
steadier/heavier showers due to lowered CIGs and/or VIS. Mountain
obscuration likely. Winds will increase late morning 18-28g30-40kts
and continue through evening, becoming around 10kts or less tonight.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  35  51  31 /  70  30  40  30
ALW  56  36  53  33 /  70  30  50  30
PSC  59  37  57  34 /  50  10  20  10
YKM  57  31  54  29 /  50  10  20  10
HRI  58  37  56  33 /  60  20  30  10
ELN  51  29  49  28 /  60  20  20  10
RDM  52  29  45  23 /  50  40  50  20
LGD  50  31  44  27 /  80  70  70  40
GCD  51  31  41  24 /  80  70  70  30
DLS  54  35  53  33 /  70  40  40  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Wind Advisory from 7 AM this morning to 7 PM PDT this evening
     for ORZ041-044-507-508-510-511.

     Winter Weather Advisory from 2 PM this afternoon to 8 PM PDT
     Tuesday for ORZ502-503-506.

WA...Wind Advisory from 7 AM this morning to 7 PM PDT this evening
     for WAZ024-026>029-521.

     Winter Weather Advisory from 2 PM this afternoon to 8 PM PDT
     Tuesday for WAZ030.

&&

$$

94/84/84


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