Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 232145
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
245 PM PDT SAT JUL 23 2016

.SHORT TERM...Tonight through Tuesday evening...Another weak wave
within the northwest flow aloft will move across the Pacific
Northwest tonight. Other than some thin cirrus clouds, this system
will have little to no affect on the area as the air mass will
continue to be relatively dry. The region will be under a flat upper
ridge Sunday and Sunday night. Thus will see fair conditions with
warmer high temps Sunday afternoon. Temps will warm further Monday
ahead of a weak wave expected to move into the region late in the
day. The air mass looks to be dry enough to limit convective
development ahead of and with this wave. Will only see some cumulus
clouds over the Washington Cascade east slopes, and over the Blue
and Wallowa mountains. With the passage of this next wave Monday
afternoon and Monday night, will see an increased surface onshore
flow again on Tuesday. As such, should see locally breezy winds and
a slight cool down of the afternoon high temps Tuesday. 90

.LONG TERM...Tuesday night through Saturday night...A flat ridge
of high pressure will keep the interior Pacific Northwest dry
through Friday night and Saturday morning. A mid/upper level trough
moves SE from the Gulf of Alaska and approaches the coast Saturday
morning and brings some elevated monsoon moisture northward from
northern California into central Oregon Saturday afternoon, which
set the stage for an elevated marginally unstable atmosphere in
Deschutes County and NE Oregon in the afternoon. The mid/upper level
trough swings across the forecast area Saturday night through Sunday
morning for a slight chance of showers and thunderstorms in central
and NE Oregon. Polan

&&

.AVIATION...00Z Tafs...VFR conditions are expected for the next 24
hours. A few cumulus over the mountains are expected for the
remainder of this afternoon and before sunset. Clear skies tonight
through Sunday afternoon. Winds will be mostly 10 kts or less.
However, sustained winds this afternoon at KDLS will be from
northwest 15-17 kts with gusts to 25 kts with winds weakening to
around 10-12 kts by 24/04Z. Winds at other TAF sites will diminish
an hour or two after sunset and quickly become drainage winds that
will continue through overnight. Winds will be 5-10 kts through
Sunday afternoon. Polan

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  90  58  95 /   0   0   0   0
ALW  58  91  64  96 /   0   0   0   0
PSC  55  93  59  98 /   0   0   0   0
YKM  53  92  59  97 /   0   0   0   0
HRI  53  93  57  97 /   0   0   0   0
ELN  55  91  59  93 /   0   0   0   0
RDM  43  90  50  92 /   0   0   0   0
LGD  47  87  50  93 /   0   0   0   0
GCD  50  91  55  94 /   0   0   0   0
DLS  59  93  64  93 /   0   0   0   0

&&

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

$$

90/99/99


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