097 
fxus65 kboi 062015 
afdboi 


Area forecast discussion 
National Weather Service Boise Idaho 
215 PM MDT Sat Sep 6 2008 


Short term...northwesterly flow aloft will continue over our County Warning Area through 
Monday. A flat short wave trough moving southeastward from northern British Columbia will 
spread clouds across Valley County late tonight. Trough will 
continue southeastward through Montana and Wyoming Sunday. Northwesterly winds will 
increase in our zones late tonight and Sunday both at the surface 
and aloft. Trough will also keep the main Pacific upper ridge from 
expanding eastward. Min temperatures tonight and Sunday night will be close to 
mav MOS...but maximum temperatures Sunday and Monday will be 2-4 degrees cooler 
than mav MOS and closer to met MOS values. 


Long term...Monday night through Saturday...shortwave trough will 
approach the intermountain west late Monday/early Tuesday for 
lowering heights and a breakdown of the upper level ridge. Shortwave 
will dig southeast across north Idaho Tuesday evening. Models 
continue to forecast moisture northeast of our area for only slight 
chances of precipitation across the west central mountains Wednesday 
morning. Main impact will be gusty west/northwest winds on Tuesday 
and Wednesday...as cyclonic middle-level flow enhances diurnal surface 
winds. Temperatures will trend back to near normal Thursday through 
Saturday as trough tracks eastward and allows western Continental U.S. Ridge to 
regain strength. 


&& 


Aviation...widespread VFR under mostly sunny skies. Light surface 
winds. Light northwesterly winds aloft. Sunday...widespread VFR. 
Light surface winds with localized gusts to 25 kts between 21z and 
03z. 


&& 


Boi watches/warnings/advisories... 
Idaho...none. 
Or...none. 


&& 


$$ 


Weather.Gov/Boise 


Short term...lc 
long term....Mt 
aviation.....Mt