Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 230959
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
259 AM PDT Mon Oct 23 2017

.SHORT TERM...Today through Wednesday...An upper level ridge
will build offshore today...then shift slowly east Tuesday. This
will bring clearing skies and light winds today. Patchy fog will
develop early Tuesday in the Columbia Basin due to radiational
cooling at the surface and and strengthening inversions due
subsidence from the ridge. daytime high temperatures will be warmer
Tuesday though surface inversions will delay heating around the
Columbia Basin resulting in a cool air pool in the Basin. This will
hold max temperatures down a little but above the inversions
temperatures will be warm.

The ridge will weaken Wednesday as a short wave and a weak cold
front moves through it. Precipitation will be limited with this
system and mainly confined to the Washington Cascades and over
northeast Oregon and southeast Washington. Coonfield

.LONG TERM...Wednesday night through Sunday...Latest model runs show
a fast moving upper level shortwave moving across NE Oregon
Wednesday night with snow level in the Wallowa Mountains lowering to
around 8200 feet overnight for a light dusting of snow in the Eagle
Caps. Otherwise, this system will be a dry event elsewhere in
forecast area. High pressure offshore near 130W Thursday moves
slowly eastward and inland on Friday bringing sinking air and dry
conditions persisting through the weekend. Mild fall temperatures
each day will be in the mid 50s to lower 60s in the lowlands and in
the mid 40s to mid 50s in the highlands.  Polan

&&

.AVIATION...06Z TAFs...VFR conditions will persist at all taf
sites for the next 24 hours. However taf sites kdls and kpsc could
experience patchy fog between 10z and 15z that may reduce vsby to 4
or 5 miles.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  63  38  62  41 /   0   0   0   0
ALW  65  39  62  44 /   0   0   0   0
PSC  64  36  60  38 /   0   0   0   0
YKM  64  34  62  36 /   0   0   0   0
HRI  64  35  61  38 /   0   0   0   0
ELN  61  33  60  38 /   0   0   0   0
RDM  66  33  67  33 /   0   0   0   0
LGD  58  36  65  40 /   0   0   0   0
GCD  62  35  69  41 /   0   0   0   0
DLS  68  41  64  43 /   0   0   0   0

&&

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

$$

76/99/

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