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Area Forecast Discussion (AFD)

Issued by Pendleton, OR (PDT)

                            
000
FXUS66 KPDT 240527 AAA
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1020 PM PDT Fri Aug 23 2019

updated the aviation discussion

.UPDATE...The latest ir satl was showing some mid and high level
clouds mainly along and north of the OR/WA state line in response
to a weak disturbance passing to our north. Dry conditions should
prevail overnight. Minor changes were done to the sky conditions
and pops and temps that are forecast to drop into the 50s and 60s
except in the 40s in the mountains.

&&

.PREV DISCUSSION... /issued 420 PM PDT Fri Aug 23 2019/ 

SHORT TERM...Tonight through Monday...Forecast area will remain 
under a dry west flow through Saturday and then a cooler but still 
dry northwest flow Sunday and Monday. A shortwave passing through 
Canada in this westerly flow will bring increasing clouds overnight 
and breezy westerly winds to the forecast area on Saturday. Slightly 
cooler and lighter winds Sunday and Monday but will see some locally 
breezy conditions each afternoon along the east slopes of the 
cascades.   

LONG TERM...Monday night through Friday. Models are in good 
agreement for most of the extended period. Upper ridge will be over 
the area Tuesday with a dry northwest flow aloft. Sunny and warm 
with highs in the 80s to lower 90s. An upper trough approaching the 
west coast on Wednesday will entrain some tropical moisture. With 
the flow becoming southwest mid and high level clouds will be 
increasing along with instability as highs will be in the upper 80s 
to mid 90s. Will hold off on thunderstorms this day however may need 
a slight chance of late day storms for central Oregon. The trough 
moves across the region on Thursday with partly cloudy skies. Have a 
slight chance of thunderstorms over central Oregon at this point. 
May need to expand northward up the Cascades. Models all indicate 
another upper trough moving into the Pacific northwest next weekend. 
94

AVIATION...vfr conditions will continue at all taf sites for the 
next 24 hours. Also brief wind gusts to 25 kts is possible between 
20z and 02z. 

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  59  84  53  81 /   0   0   0   0 
ALW  62  85  59  81 /   0   0   0   0 
PSC  62  86  59  86 /   0   0   0   0 
YKM  58  84  54  82 /   0   0   0   0 
HRI  61  86  56  84 /   0   0   0   0 
ELN  58  80  56  79 /   0   0   0   0 
RDM  48  86  48  83 /   0   0   0   0 
LGD  53  85  50  78 /   0   0   0   0 
GCD  50  87  51  82 /   0   0   0   0 
DLS  60  81  59  81 /   0   0   0   0 

&&

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

$$

97/99/97