Area Forecast Discussion
Issued by NWS Pendleton, OR

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940
FXUS66 KPDT 232117
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
217 PM PDT Sat Sep 23 2017

.SHORT TERM...Tonight through Tuesday. Northerly flow continues
over the area today. Weak instability resulting in some cumulus
development over the mountains. This will diminish after sunset.
Otherwise expect partly cloudy skies this evening and overnight.
Temperatures will be cool with lows in the 30s to mid 40s. Upper
level ridge builds into the region Sunday with mostly sunny skies
and warmer temps. A weakening system will be moving through the
ridge Sunday night into Monday with increased mid and high level
clouds. The ridge strengthens again on Tuesday. Overall looks to a
period of fair weather with temperatures just a few degrees below
normal. Winds remain light. 94

.LONG TERM......Tuesday Night through Saturday...An upper level
ridge will build off the Pacific Northwest coast Tuesday night. The
ridge will shift slowly east Wednesday and Thursday. Subsidence
from the ridge will produce warm days...clearing skies and light
winds. Strong radiational cooling will occur at night...especially
in mountain valleys including Seneca Meacham and Ukiah. As the
ridge axis moves east of the CWA Friday southwest flow aloft will
bring increasing moisture to eastern WA and OR. A weak front will
move through Canada Friday night. Since the dynamic lift will
remain in Canada the main effects will be a reversal of the
warming trend as upper level flow behind the front becomes more
zonal. Coonfield

&&

.AVIATION...00Z TAFs...VFR conditions will prevail for the next
24 hours. Decreasing mid/high clouds tonight. Winds will be less
than 15 kts. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  68  43  68 /   0   0   0  10
ALW  44  70  46  69 /   0   0   0  10
PSC  41  72  46  72 /   0   0   0  10
YKM  41  71  46  71 /   0   0   0  10
HRI  41  71  45  72 /   0   0   0  10
ELN  40  68  44  69 /   0   0   0  10
RDM  32  67  37  69 /   0   0   0   0
LGD  36  64  36  65 /  10   0   0  10
GCD  33  64  36  66 /  10   0   0  10
DLS  44  73  50  71 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
&&

$$

94/76/76



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