Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 261009 CCA
AFDPDT

Area Forecast Discussion...Corrected
National Weather Service Pendleton OR
300 AM PDT Fri May 26 2017

Corrected the LONG TERM and AVIATION Discussions

.SHORT TERM...Today through Monday morning...An upper level trough
over eastern Oregon will move slowly away from the area today. There
will be a little wrap-around moister over the far east today. Models
are showing some meager instability which may allow for isolated to
widely scattered showers and a slight chance of a thunderstorm
until about 00Z...mainly close to the Idaho border. Afterwards
expect dry weather to persist through Monday morning as an upper
level ridge builds over the region. Models do show some instability
over the mountainous areas on Sunday afternoon but think with the
ridge in place it will be difficult to get more than some cumulus
buildups. Temperatures will be on the increase through the period.
It will be in the 70s/60s mountains today with 80s/70s mountains
Saturday and Sunday. Could see a few lower 90s Columbia Basin Sunday
afternoon. Winds will be light and mostly terrain driven through the
forecast period. 78

.LONG TERM...Monday afternoon through Thursday...Models are
consistent in showing a negatively tilted mid/upper level trough
approaching the coast late Monday thus helping to break down the
strong ridge of high pressure.  Scattered showers and a few
thunderstorms may occur along the east slopes of the Cascades Monday
afternoon/evening.  The trough then moves into the region on Tuesday
through Thursday and introduces marginal instability for scattered
showers and a slight chance of afternoon/evening thunderstorms each
day.  Any thunderstorms that do develop will mainly be over the
higher terrain and mountains.  Polan

&&

.AVIATION...12Z TAFs...VFR conditions will prevail tonight through
Friday evening and in the overnight period from midnight to
daybreak on Saturday. There may be a few showers in the eastern
mountains in the afternoon, but they are expected to taper off and
and end by 01Z/27th. Otherwise, the weather will be fair at all TAF
sites with light winds.  Polan

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  74  48  82  53 /  10   0   0   0
ALW  76  52  85  58 /  10   0   0   0
PSC  80  54  88  54 /   0   0   0   0
YKM  80  50  86  55 /   0   0   0   0
HRI  79  51  86  54 /   0   0   0   0
ELN  77  49  82  52 /   0   0   0   0
RDM  72  43  83  45 /   0   0   0   0
LGD  68  44  80  47 /  10   0   0   0
GCD  68  43  83  48 /  10   0   0   0
DLS  82  55  89  57 /   0   0   0   0

&&

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

$$

78/99/99



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