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Area forecast discussion 
National Weather Service Boise Idaho
327 am MDT Tuesday Sep 27 2016

Short through Wednesday...temperatures will remain
about 10 to 12 degrees above normal today and Wednesday
underneath an upper level ridge. The temperatuers should reach
the mid 80s today and then the upper 80s on Wednesday. The upper
level ridge begins to weaken today and shift eastward Wednesday in
response to the next upper level trough for the end of week.

Long term...Wednesday night through the upper level
ridge transitions east through Thursday, a southerly flow will
strenghten which will aid monsoon moisture in its journey northward
out of the Desert Southwest. Showers and thunderstorms will be
possible with this moisture surge mainly over the central Idaho
mountains and over the Magic Valley and south through Thursday
night. The ridge and monsoon moisture will be kicked east on Friday
as a deep upper level trough descends out of the Gulf of Alaska and
into the Pacific northwest. Will see a cold frontal passage on
Friday associated with the trough, which will bring a 5-10 degree
temperature drop from the previous day and a round of showers and
thunderstorms to the region. Best chance of precipitation is
expected over the higher terrain. Unsettled weather and cooling
temperatures are expected into the beginning of next week with the
most dramatic temperature drop forecast for Friday into Saturday
with a 9-12 degree temperature drop. Temperatures will be about 10
degrees below normal by Monday.


Aviation...VFR. Mostly clear. Surface winds: variable 10 kts or
less. Winds aloft near 10 kft msl: west at 5-10 kts.


Boi watches/warnings/advisories...




Short term...jds
long term....ab

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