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Area forecast discussion...updated 
National Weather Service Pendleton or
1006 am PDT sun Jul 24 2016

Updated aviation discussion

Short term...morning update...flat upper ridging will persist
through tonight with a mostly dry and relatively light westerly flow
aloft. Low level moisture is also fairly limited, thus may only see
a few stray cumulus clouds over the mountain ridges this afternoon.
Otherwise expect clear skies. With abundant sunshine and warmer air
aloft, high temps this afternoon will run 5 to 10 degrees warmer
than yesterday. Current forecast package in good shape and only a
few minor adjustments to high temperature and wind forecasts were
needed. 90

Aviation...18z tafs...VFR conditions and clear skies will occur for
the next 24 hours. Sustained winds will be 10 kts or less. Polan

Long term...previous discussion...the interior Pacific northwest
will reside at the northern periphery of a large dome of high
pressure centered across the Desert Southwest/Great Basin. Dry
conditions will prevail through at least Friday. The GFS continues
to show some moisture nudging northward Saturday...but the other
medium range models keep the local area dry. Will cap pops at around
10% Saturday afternoon across central Oregon to the eastern
mountains. The main forecast concern will be the building heat...as
850mb temperatures rise from 21-23c Wed/Thu to 24-26c Fri/Sat. Will
continue to forecast highs at the warmer side of the guidance
envelope...with mid/upper 90s for the lowest elevations Wed/Thu...
and 98-103 Fri/Sat. There will be only minor relief from the heat
across the mountains...with highs warming well into the 80s...with
some lower 90s possible by Saturday. Low temperatures will rise
gradually as well...with widespread 60s for the lower elevations...
with a few locations remaining around 70 Friday night.

&&

Preliminary point temps/pops...
PDT 90 58 94 63 / 0 0 0 0
alw 91 64 95 68 / 0 0 0 0
psc 93 59 97 65 / 0 0 0 0
ykm 93 59 96 64 / 0 0 0 0
hri 93 57 96 66 / 0 0 0 0
eln 91 59 92 65 / 0 0 0 0
rdm 91 50 91 51 / 0 0 0 0
lgd 88 50 92 58 / 0 0 0 0
gcd 92 55 93 57 / 0 0 0 0
dls 93 64 92 66 / 0 0 0 0

&&

PDT watches/warnings/advisories...
or...none.
Washington...none.
&&

$$

90/99/80

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