Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

fxus66 kpdt 190847 
afdpdt

Area forecast discussion
National Weather Service Pendleton or
147 am PDT Mon Aug 19 2019

Short term...today through Wednesday night...a westerly flow early
this morning will become southwest by this afternoon and then will
persist through Wednesday. An upper trough embedded in the flow will
move across the region and forecast area late Wednesday and
Wednesday night. This will bring limited moisture to the County Warning Area on
Wednesday and Wednesday night. The moisture will be limited, but
there should be enough for some showers over mainly the Cascade east
slopes Wednesday afternoon and night. Precipitation amounts should
be very light due to the limited moisture. The upper trough axis
with this system will cross the central County Warning Area Wednesday night and then
will move out during the beginning of the extended period. Models
are in good agreement through most of the short term. Temperatures
will increase with a warming trend through Tuesday, with maximum
readings in the lower to mid 90s in the lower elevations and then
cooling to the upper 80s to lower 90s on Wednesday as the upper
trough approaches the forecast area. It will become breezy to windy
over much of the forecast area with this system, especially
Wednesday evening. Winds should stay below advisory criteria. 88

Long term...Thursday through Monday...a fairly deep upper level
trough will be exiting the region to the east Thursday morning
followed by dry northwest flow aloft through the weekend into early
next week. There will be little if any chance for showers under this
flow pattern with just a few clouds from time to time mainly north.
It will be cool Thursday behind a surface cold front with below
normal temperatures. The rest of the period the temperatures will be
within a few degrees of normal for this time of year. There will be
occasional breezy periods in the afternoon and evening especially in
the Cascade gaps with the strongest winds expected on Saturday. 78

&&

Aviation...12z tafs...VFR conditions with clear skies through the
12z Tuesday. Winds mostly 12 kt or less today but around 15 kt with
gusts to 20-25 kt at kdls. Winds becoming mostly light and terrain
driven tonight. 78

&&

Preliminary point temps/pops...
PDT 87 55 92 60 / 0 0 0 0
alw 90 60 97 64 / 0 0 0 0
psc 90 60 95 66 / 0 0 0 0
ykm 89 56 94 60 / 0 0 0 0
hri 91 57 96 62 / 0 0 0 0
eln 85 55 91 60 / 0 0 0 0
rdm 87 52 92 54 / 0 0 0 0
lgd 86 55 93 59 / 0 0 0 0
gcd 91 55 97 57 / 0 0 0 0
dls 87 61 94 65 / 0 0 0 0

&&

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

National Weather Service Glossary of Abbreviations