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Area forecast discussion
National Weather Service Boise Idaho
339 am MDT Tue Sep 26 2017

Short through Wednesday...dry and mild weather
through Wednesday as an upper ridge builds into the Pacific northwest.
Cloud cover this morning will erode through the day as a drier
airmass develops under the strengthening ridge. High temperatures
warm several degrees from the previous day, reaching normal values
by Wednesday.

Long term...Wednesday night through Monday...unsettled and
cooler. The upper level ridge will provide dry weather with
temperatures a few degrees above normal Wednesday night and
Thursday. Temperatures will continue above normal on Friday ahead
of an upper level trough approaching the Pacific northwest and
western Canada. As the trough edges closer to our area, it will
bring a slight chance of showers for eastern Oregon and the west
central Idaho mountains as early as Friday afternoon. Showers will
spread across eastern Oregon and southwest Idaho Friday night and
Saturday morning as the trough moves inland. By Saturday
afternoon precipitation will be mainly confined to the central
Idaho mountains and Baker County Oregon, with snow levels 6500 to
7000 feet in those areas. Temperatures on Saturday will be about
10 degrees cooler than Friday, with breezy northwest winds. Models
disagree on how soon the trough will exit the intermountain
region Sunday and Monday, and the European and Canadian models
show another trough from the Gulf of Alaska dropping south over
our area on Monday. So we can expect a continuing chance of
precipitation and below normal temperatures, with snow levels
lowering to around 6000 feet by Monday.


Aviation...VFR. Areas of mid-level clouds. Surface winds
light and variable. Winds aloft at 10k feet mean sea level northeast 10-20


Boi watches/warnings/advisories...




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