Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 250243

Area Forecast Discussion
National Weather Service Boise ID
843 PM MDT Sun Sep 24 2017

.DISCUSSION...Relatively dry northerly flow aloft will continue
overnight before backing to northwest tomorrow. Partly cloudy
skies will continue with no chance for precipitation. Temps will
be cool again tonight, but not quite as cool as last night. No
changes at this time.


.AVIATION...VFR. Mid-upper level moisture through the night with
some clearing in the mid levels Monday afternoon. Surface winds,
light and variable. Winds aloft to 10k feet MSL, northerly 5-10


SHORT TERM...Tonight through Tuesday...Mostly clear skies and
breezy conditions across open terrain will continue to be the
story for the remainder of the day. Winds will taper off around
sunset. A shortwave trough is set pass through the building ridge
beginning shortly after midnight tonight. It`s associated warm-
front will bring increased cloud coverage to the region Monday,
which will cause a brief slow-down in the warming trend in store
for this week. Little to no precipitation is expected as the front
passes through the region Monday afternoon and evening. Tuesday
will see the return of sunny skies and warming temperatures as the
upper level ridge builds further inland.

LONG TERM...Tuesday night through Sunday...High pressure anchored
over the area will continue the warming trend through the work week.
By Wednesday, temperatures will be within a couple degrees of
normal, with Thursday and Friday seeing values at or slightly above
normal. The ridge axis will have moved through the area by Friday
afternoon, with a weak cold front pushing through the area early
Saturday ahead of returning northwest flow. While it is not out of
the question for this system to produce a high terrain shower or two
on Saturday, coverage should be very limited with the threat mainly
over Baker County in Oregon. Additionally, this system looks to
decrease temperatures a few degrees across much of the forecast
area. Weak moisture in the northwest flow may produce additional
isolated higher terrain showers across the West Central Mountains in
Idaho for Sunday, though confidence in this development is not high.





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