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fxus66 kotx 050011 cca 
afdotx 


Area forecast discussion...corrected 
National Weather Service Spokane Washington 
455 PM PDT Friday Jul 4 2008 


Synopsis...isolated showers and thunderstorms will continue 
through the evening hours. After that...near normal temperatures 
and a dry forecast through the rest of the Holiday weekend. 




&& 


Discussion... 
corrected typo in aviation discussion. 


Tonight...elevated showers associated with a cold front passage 
will continue their northeastward progression through the late 
afternoon and early evening hours. Ceilings remain very 
high...around 9-10k feet. Omak earlier today received 0.05 of 
precipitation...otherwise all other locations have received a trace or 
hundredth. This light rain will move across eastern Washington and north 
Idaho through the late afternoon and then shift into Idaho this 
evening. The best chance for thunderstorms this evening will be 
across the Idaho Panhandle...but even confidence in that is waning. 
Some showers have developed behind the front across central 
Washington and have moved up into the basin. Do not expect much out 
of these showers...some sprinkles/light rain with trace amounts on 
the ground. There were a few lightning strikes earlier in the Yakima 
area...but nothing so far in our area. Still...will add isolated 
thunder in the forecast through 3z. Overall idea for this evening 
will be decreasing chance of showers/thunderstorms and skies 
clearing. 


Saturday through Sunday night...upper level low that is currently 
near 142w/49n will weaken and near the British Columbia coast 
Saturday. All of the energy will remain to the north as it moves 
inland Sat night. The inland northwest will remain in westerly 
flow through the weekend with average temperatures for this time 
of the year. /Nisbet 


Monday through Thursday...dry and very warm conditions prevail 
during the extended period. Middle level heights start to rise on 
Monday as a Pacific Ridge migrates east. Temperatures will be on an 
upward trend through midweek as the ridge axis moves over the inland 
northwest. 850mb temperatures start the week in the upper teens then 
warm a couple of degrees each day peaking on Wednesday when readings 
reach around 23c. This will translate to most valley locations in 
the 90s. By Thursday an upper level low starts to drop down out of 
the Gulf of Alaska flattening the ridge a bit. This will mean 
slightly cooler temperatures for the end of the workweek but 
readings will remain above seasonal normals. Guidance disagrees in 
timing the breakdown of the ridge with the European model (ecmwf) bringing the trough 
through the region Thursday night and the GFS a bit slower. At this 
point the forecast remains dry. /Kelch 
&& 


Aviation... 
a cold front will continue to move east through extreme eastern 
Washington and north Idaho this evening. Scattered showers will 
impact the kgeg-kcoe terminals this evening with isolated showers in 
the klws area. The best instability and frontal forcing for thunder 
will be east of the main terminals...over the eastern fringes of the 
Idaho Panhandle into western/central Montana. Showers will diminish 
and move east of the forecast area after 06z. West-northwest winds will gust to 
25 kts in the keat area then diminish after sunrise. /Ek 




&& 


Preliminary point temps/pops... 
Spokane 58 81 57 82 54 86 / 20 0 0 0 0 0 
Coeur D'Alene 56 80 56 81 54 85 / 20 0 0 0 0 0 
Pullman 53 79 52 80 50 85 / 20 0 0 0 0 0 
Lewiston 61 87 61 86 59 93 / 20 0 0 0 0 0 
Colville 54 84 52 85 52 89 / 20 0 0 0 0 0 
Sandpoint 57 78 52 79 48 84 / 20 0 0 0 0 0 
Kellogg 55 79 56 79 54 82 / 30 0 0 10 0 0 
Moses Lake 59 86 59 89 58 94 / 20 0 0 0 0 0 
Wenatchee 61 84 61 86 60 92 / 10 0 0 0 0 0 
Omak 55 85 54 88 53 90 / 0 0 0 0 0 0 


&& 


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


$$