575 
fxus66 kpdt 231558 aaa 
afdpdt 


Area forecast discussion...updated 
National Weather Service Pendleton or 
755 am PST Monday Nov 23 2009 


Short term...high pressure that is providing a mostly sunny 
beginning will give way to a disturbance moving into the pacnw this 
afternoon. This should spread clouds into portions of the area 
especially over the Washington Cascades where a few showers may develop late 
this afternoon and then spread east later on. Otherwise high temperatures 
seem to be in the ballpark and the short term forecast appears on 
track for now. 


&& 


Previous aviation discussion...12z tafs...VFR conditions will 
prevail through the day today with middle and high clouds. Another 
weather disturbance will move into the area overnight tonight with 
another chance of rain and mountain snow. This will mainly affect 
northeast Oregon and eastern Washington. Taf krdm in central Oregon 
will likely not see any precipitation from this system. There may be 
brief periods of MVFR or even IFR tonight in rain/snow 
showers...especially at kdls...kykm and kpsc...and to a lesser 
degree at kpdt and kalw. Winds of 10 to 20 kts this morning will 
gradually continue to decrease today. The wind is not expected to 
increase much with this next system... but perhaps 15 to 25 kts at 
times...especially near showers and with the cold front passage. 88 


&& 


Preliminary point temps/pops... 
PDT 47 34 48 33 / 0 20 20 0 
alw 47 36 47 35 / 0 20 20 0 
psc 48 34 47 32 / 10 20 10 0 
ykm 44 28 46 30 / 10 30 20 0 
hri 49 32 48 31 / 0 20 10 0 
eln 43 30 45 31 / 10 30 20 10 
rdm 46 26 50 25 / 0 10 10 0 
lgd 40 29 44 27 / 0 20 20 0 
gcd 43 27 47 27 / 0 10 10 0 
dls 46 35 48 37 / 10 30 20 0 


&& 


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


Threat index 
today : green 
Tuesday : green 
Wednesday : green 


Green: none or limited need for watches, warnings, or advisories. 
Yellow: a few watches, warnings, or advisories possible or in effect. 
Red: numerous watches, warnings, or advisories possible or in effect. 


For additional weather information, check our web site at... 
www.Weather.Gov/Pendleton 


$$ 


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