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Area Forecast Discussion (AFD)

Issued by Pendleton, OR (PDT)

                            
000
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 CWA 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 CWA 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.
WA...None.

&&

$$

88/78/78