Weather Service Report


397 
FXUS66 KPDT 290927
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
227 AM PDT Thu Jun 29 2017

.SHORT TERM...Today through Saturday...An upper trough over the 
northern Rocky Mountains is exiting to the east. The radar imagery 
is still showing some showers mainly north of the CWA this morning 
and moving east. These will likely stay out of the PDT forecast 
area. A northwest flow will prevail today behind this weather 
system. However, winds will be light today in all areas. A high 
pressure ridge will build off the cost and slowly move closer to the 
coast, and eventually it will move into the Pacific Northwest on 
Friday and Saturday. This will result in a warming trend with dry 
conditions through the short term period. However, there will be 
increasing instability on Saturday late afternoon with some increase 
in moisture. Have therefore added a slight chance of thunderstorms 
late Saturday afternoon, which will continue into the extended 
period (Saturday night) over the northeast mountains. Temperatures 
today will be in the 80s...except mostly 70s in the mountains. These 
temperatures will warm up to the lower to mid 90s in the lower 
elevations on Friday and Saturday...with mostly mid 70s to lower 80s 
in the mountain zones. Winds will remain light through the short 
term period. 88

.LONG TERM...Saturday night through Wednesday...A weak disturbance 
combined with instability from daytime heating will result in a few 
thunderstorms over our eastern most zones Saturday evening. The 
pattern looks to then be generally westerly and dry Sunday and 
Monday. Thus will continue to indicate fair and dry conditions with 
slightly above seasonal high temps Sunday and Monday. Uncertainty in 
the large scale pattern increases for Tuesday and Wednesday. GFS run-
to-run consistency is only fair, but is better than the ECMWF which 
is poor. Will therefore continue the current fair and dry forecasts 
due to the low confidence in forecast solutions. 90 

&&

.AVIATION...Previous Discussion...06Z TAFs...VFR conditions will 
persist at all TAF sites for the next 24 hours. Winds will decrease 
overnight and be less than 10 kts on Thursday. 

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  80  57  88  60 /   0   0   0   0 
ALW  84  62  90  65 /   0   0   0   0 
PSC  88  59  93  61 /   0   0   0   0 
YKM  89  60  92  63 /   0   0   0   0 
HRI  86  57  92  61 /   0   0   0   0 
ELN  86  55  90  59 /   0   0   0   0 
RDM  85  46  89  48 /   0   0   0   0 
LGD  80  50  86  53 /   0   0   0   0 
GCD  83  51  91  53 /   0   0   0   0 
DLS  87  61  90  62 /   0   0   0   0 

&&

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

$$

88/90/90

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Western Regional Climate Center, wrcc@dri.edu