Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 252111
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
211 PM PDT Thu May 25 2017

.SHORT TERM...Tonight through Sunday...A weak shortwave dropping
south over the region this evening will produce a few showers and a
slight chance of some thunderstorms. The upper level trough will
begin to shift eastward on Friday as an upper level ridge of high
pressure off the coast begins to move inland. There will continue to
be a few showers over the eastern mountains on Friday and a slight
chance of thunderstorms. By Saturday and Sunday the ridge will be
centered over the forecast area with temperatures rising above
normal.

.LONG TERM...Sunday night through Thursday...An upper level ridge
remains over WA and OR Sunday night, but begins to break down Monday
(GFS) or Tuesday (ECMWF). A few thunderstorms may develop during the
afternoon heating near the Cascades Monday and Tuesday. Both GFS and
EC show southwest flow on Wednesday and Thursday, a slight chance of
showers and thunderstorms will spread to the northwest OR mountains.
High temperatures will be 10 to 15 degrees above normal Monday and
Tuesday with the ridge, ample sunshine, and southwest flow. This
will tend to keep some streams running high from increased snow
melt. By Wednesday afternoon temperatures will cool slightly but
still remain above normal.  Coonfield



&&

.AVIATION...0z TAFS...Satellite and radar show some mid and high
level clouds and a few -SHRA affecting KYKM, KALW, KPSC, and KPDT. A
few CU buildups have developed near KDLS, KRDM, and KBDN. Expect
some clearing overnight. Mainly light diurnal winds under weak
pressure gradient. 76


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  45  75  51  81 /  20   0   0   0
ALW  48  79  57  85 /  20  10   0   0
PSC  47  82  52  87 /  10   0   0   0
YKM  48  83  55  88 /  20   0   0   0
HRI  46  80  52  86 /  10   0   0   0
ELN  47  81  52  85 /  20   0   0   0
RDM  39  77  42  83 /  10   0   0   0
LGD  44  69  44  78 /  30  20   0   0
GCD  41  72  43  81 /  30  10   0   0
DLS  51  85  56  91 /  20   0   0   0

&&

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

$$

91/76/76



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