761 
fxus66 kpdt 200920 
afdpdt 


Area forecast discussion 
National Weather Service Pendleton or 
220 am PDT sun Jul 20 2008 


Short term...today through Monday night...high pressure will 
influence the regions weather today with dry conditions and very 
warm temperatures. Afternoon highs should climb into the 90s across the 
portions of the basin today and Monday. Low pressure off the cali 
coast may creep far enough north and push some middle level moisture 
into the southern portions of the area Monday. Combining this with 
daytime heating may produce an isolated afternoon/evening thunderstorms and rain over central 
Oregon and extending northeast into the area mountains of the S 
blues/wallowas. 


Long term...Tuesday through Sunday...the upper trough of low 
pressure will continue to move across the region with increasing 
moisture and instability Tuesday and Tuesday night. There will be 
just enough moisture and instability to warrant isolated 
thunderstorm development again Tuesday afternoon and evening in the 
eastern mountains. The upper trough will then move east of the area 
by Wednesday and be replaced with a dry and stable westerly flow 
again. There are some model differences from Wednesday Onward...but 
the overall pattern will keep dry and very warm conditions over the 
Pacific northwest for the remainder of the week into the weekend. 88 


&& 


Aviation...VFR conditions with generally light winds will prevail 
through tonight. Wind speeds may increase to 10 to 20 kts this 
afternoon at kdls...however winds will remain between 5 and 15 kts 
elsewhere today and tonight. 88 


&& 


Preliminary point temps/pops... 
PDT 94 59 92 60 / 0 0 0 10 
alw 94 60 93 63 / 0 0 0 10 
psc 96 57 96 59 / 0 0 0 10 
ykm 94 55 90 57 / 0 0 0 10 
hri 95 58 94 58 / 0 0 0 10 
eln 91 57 88 59 / 0 0 0 10 
rdm 91 46 91 46 / 0 0 20 20 
lgd 93 53 93 55 / 0 0 20 20 
gcd 93 52 93 53 / 0 0 20 20 
dls 90 63 89 62 / 0 0 0 10 


&& 


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


$$ 


Ti:ggg 
for additional weather information, check our web site at... 
www.Weather.Gov/Pendleton 
97/88/88