Area Forecast Discussion
Issued by NWS Pendleton, OR

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
209
FXUS66 KPDT 271000
AFDPDT

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

.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 night through Friday...Mid/upper level ridge of
high pressure shifts eastward Monday night allowing increasing mid
level moisture into central and north central Oregon and along the
east slopes of the Washington Cascades for a chance of showers along
in these western sections of the forecast area. Lingering marginal
instability will be present through Monday night for a slight chance
of nocturnal thunderstorms. Tuesday through Thursday night a
mid/upper level trough swings inland and moves across the interior
Pacific Northwest for an unsettled period of scattered showers and a
chance of afternoon/evening thunderstorms Tuesday afternoon/night
due to a cold front moving into the region. The upper trough exits
the region on Friday.  Polan

&&

.AVIATION...12Z TAFs...VFR conditions will prevail at all TAF sites
with just some cumulus buildups Saturday afternoon and evening
generally between 070-100. Winds will be light and terrain driven at
all TAF sites.  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

!--not sent--!



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.