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fxus66 kotx 201759 aab 
afdotx 


Area forecast discussion...updated 
National Weather Service Spokane Washington 
1059 am PDT Wednesday Aug 20 2008 


Synopsis... 
a deep and unusually strong upper level trough will move over the 
inland northwest today...bringing wet weather and cooler than 
normal conditions to the area through Thursday. 




&& 


Discussion... 
update this morning to increase probability of precipitation and cloud cover over the 
eastern basin and southeast zones as a band of heavier showers 
moves east through the area. Maximum temperatures were also adjusted 
down a few degrees mainly over the eastern half of the forecast 
area to account for more persistent cloud cover. Satellite imagery 
shows some breaks in the clouds over the western basin late this 
morning. If the sun breaks through over the higher terrain this 
afternoon there is the potential for thunderstorms so a slight 
chance of thunder remains in the forecast through this evening over 
the eastern mountains. /Kelch 


&& 


Aviation... 
a broad area of showers will continue to move east across extreme 
eastern Washington and northern Idaho this afternoon...producing 
occasional MVFR ceilings from kpuw north to Spokane until around 
21z...as well as create widespread mountain obscurations north and east 
of the Columbia Basin. Following a break in the precipitation early this 
afternoon...scattered rain showers and isolated thunderstorms and rain will develop this 
afternoon then end by this evening. The best chance of thunderstorms and rain will 
stretch from klws north to kpuw and the Spokane area. Yet another shot 
of showers is expected overnight...especially across north Idaho as a 
second wave passes through. 




&& 


Preliminary point temps/pops... 
Spokane 68 54 65 49 78 50 / 100 60 50 20 0 0 
Coeur D'Alene 66 52 61 47 77 48 / 100 60 50 20 0 0 
Pullman 69 52 66 42 77 45 / 100 60 50 20 0 0 
Lewiston 73 59 72 54 84 57 / 70 50 40 20 0 0 
Colville 67 49 69 41 82 46 / 90 70 50 20 0 0 
Sandpoint 61 50 58 42 76 43 / 100 70 60 30 0 0 
Kellogg 61 50 59 45 76 51 / 100 80 60 30 20 0 
Moses Lake 73 53 74 48 82 52 / 40 30 20 10 0 0 
Wenatchee 73 55 76 55 83 58 / 40 30 20 10 0 0 
Omak 73 51 78 48 83 52 / 60 40 20 10 0 0 


&& 


Otx watches/warnings/advisories... 
Idaho...none. 
Washington...none. 
&& 


$$