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Area forecast discussion 
National Weather Service Grand Junction Colorado 
420 am MDT Sat Sep 6 2008 


Short term...today through Sunday night... 
dry and stable west to northwest flow will prevail through Sunday 
night. Embedded disturbances in the flow will stay north of 
Colorado. However a shallow cool front does move into northwest Colorado 
late Sunday night ahead of a digging trough in Wyoming. Aside from 
a few cirrus streaks for the next two days...not much else to 
impact sensible weather. Temperatures will be near seasonal for 
the remainder of the weekend. 


Long term...Monday through Friday... 
a weak trough develops along the California coast by early Monday 
which will back the flow aloft to the southwest. This eventually 
appears to develop a weak tap to subtropical moisture to our south. 
Expect enough moisture by Tuesday afternoon to produce scattered 
thunderstorms over most higher mountains moisture already begins to decrease 
Wednesday as the flow becomes more westerly as a short wave passes 
to the north. Some increase in dynamics will offset decreasing 
moisture which will result in another round of isolated mountain thunderstorms. 


Then as the northwest shortwave moves east...an associated cold front 
will reach the northern edge of the forecast area in the late 
Wednesday/early Thursday time-frame. Once this disturbance passes the chance of 
showers/thunderstorms ends...for dry conditions again on Friday. 


&& 


Aviation... 
VFR conditions will prevail through Sunday morning. 


&& 


Gjt watches/warnings/advisories... 
Colorado...none. 
Utah...none. 


$$ 


Short term.....Pf 
long term......mc/eh 
aviation.......tgjt