105 FXUS65 KBOI 102051 AFDBOI Area Forecast Discussion National Weather Service Boise ID 251 PM MDT Wed Oct 10 2018 .SHORT TERM...Tonight through Friday...A weak upper level system will move southeast across the eastern portion of the CWA overnight, spreading light showers mainly into the higher terrain on the Idaho side. Upslope showers will also form in southeast Owyhee County and southern Twin Falls County. These showers will dissipate as the system moves away early Thu, and we will be mostly clear, dry, and cool Thu afternoon through Friday. Our upper level flow will shift from northerly to northwesterly by Friday afternoon. .LONG TERM...Friday night through Wednesday...Northerly flow aloft will continue to bring below-normal temperatures to the area through Monday morning. Temperatures will be about 10 degrees below normal before a warming trend begins on Monday afternoon. This could also bring a hard frost and the first freeze of the season to agricultural areas. High pressure builds over the region on Tuesday and Wednesday allowing temperatures to warm back to normal or even a few degrees above normal. It will be dry through the period under mostly clear skies. && .AVIATION...A few areas of mountain obscurations and low ceilings continue in the Idaho mountains with some MVFR ceilings at KTWF and KJER. However, conditions will improve later tonight with VFR expected from late tonight through Thursday through all of southwestern Idaho and southeastern Oregon. Winds will be light and variable after sunset. Expect mostly clear skies on Thursday. Winds aloft at 10kft MSL will be northerly 5-10kt. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && $$ www.weather.gov/Boise www.facebook.com/NWSBoise www.twitter.com/NWSBoise SHORT TERM...SP LONG TERM....JB/AL AVIATION.....JB