Weather Service Report


897 
FXUS66 KPDT 251740 AAB
AFDPDT

Area Forecast Discussion...Updated
National Weather Service Pendleton OR
1039 AM PDT SUN SEP 25 2016

Updated AVIATION Discussion

.UPDATE...The latest satellite was showing some mid and high level
clouds over portions of the region while a strong high pressure
system along the west coast dominates our areas weather with dry
conditions today and above normal temperatures. The high pressure
system will remain stationary into the beginning of next week and
afternoon temperatures will climb even higher on Monday. Other than
some minor changes to sky conditions and temps the present short
term forecast appears on track.

&&

.AVIATION...18Z TAFS...VFR conditions to prevail due to a building
mid/upper level ridge of high pressure over the Pacific Northwest.
FEW-SCT mid/high level clouds this morning will clear out this
afternoon with clear skies through the remainder of the period.
Winds will be less than 10 kts.  Polan

&&

.PREVIOUS DISCUSSION... /issued 412 AM PDT SUN SEP 25 2016/ 

SHORT TERM...Today through Wednesday evening...An upper level ridge
will build into the Pacific Northwest today. The axis of this ridge
will move across the region tonight. A weak Pacific system will then
move into and over the ridge Monday through Tuesday. This will
result in the ridge flattening by Tuesday. Will see fair and dry
conditions today into Monday areawide. Mid and high level clouds
will drift over southeast Washington and northeast Oregon this
morning, then decrease this afternoon. Skies will be clear tonight
and sunny on Monday. High temps will warm Monday, being well above
seasonal areawide. With the Pacific system flattening the ridge
Monday night into Tuesday, will see increasing onshore flow with
temps cooling a bit on Tuesday. Best cool down will be near the
Cascade crest, in the Gorge and in the Kittitas valley. There may be
some light precip near the Cascade crest in western Kittitas county
Tuesday morning as well. A relatively dry southwest flow will be
over the region Wednesday, but high temps will cool a few more
degrees over much of the area. 90 

LONG TERM...Wednesday night through Saturday...An offshore upper
level trough will deepen Wednesday night through Saturday. This will
increase southerly flow over WA and OR and transport moisture and
instability into the CWA. Thursday there will be a slight chance of
showers from central to northeast OR and along the Cascades as a
weak disturbance in the southerly flow moves through eastern WA and
OR. Friday night and Saturday a stronger disturbance will move
through the area. This will bring higher pops and cooler
temperatures to WA and OR next weekend.  Coonfield 

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  49  85  55 /   0   0   0   0 
ALW  80  55  86  59 /   0   0   0   0 
PSC  80  48  85  53 /   0   0   0   0 
YKM  82  45  86  53 /   0   0   0   0 
HRI  81  47  87  51 /   0   0   0   0 
ELN  81  43  85  55 /   0   0   0   0 
RDM  83  42  89  44 /   0   0   0   0 
LGD  79  43  84  48 /   0   0   0   0 
GCD  81  44  87  49 /   0   0   0   0 
DLS  86  51  88  60 /   0   0   0   0 

&&

.PDT Watches/Warnings/Advisories...
OR...None.
WA...None.
&&

$$

97/99/90/76

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Western Regional Climate Center, wrcc@dri.edu