Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 231529

Area Forecast Discussion
National Weather Service Boise ID
929 AM MDT Sat Sep 23 2017

.DISCUSSION...The drying and warming trend will continue today as
the upper level low influencing the region continues its journey
east. Expect maximum temperatures today to be about 4-8 degrees
warmer than yesterday`s. Mostly clear skies tonight will allow
for another cool night however, and areas within the western
Magic Valley and upper Treasure Valley east of Boise may reach
near-freezing temperatures yet again. Forecast is on track with
no updates anticipated.


.AVIATION...Mostly VFR. Lingering low clouds will lift this morning.
A few showers remain possible over the higher terrain into the
afternoon hours, with brief periods of obscured mountain tops.
Improving conditions expected after 06z Sunday. Surface winds: North
to Northwest at 5 to 10 kts, increasing slightly during the
afternoon across the Treasure Valley. Gusts to near 20 kts possible
around KMUO. Winds aloft to 10k feet MSL: North 10-20 kts.

Sunday Outlook: VFR expected under increasing high pressure. Surface
winds will be northwest around 10 kts except during the afternoon
hours when the Treasure Valley will see speeds to around 15 kts
with higher gusts.


SHORT TERM...Today through Sunday...Upper level trough will work
eastward through Sunday bringing drier conditions and a slow
warming trend. The central Idaho and far eastern Boise mountains
will keep scattered clouds and slight chance of showers for today.
Otherwise the region will be dry with high temperatures 3 to 8
degrees warmer than yesterday (though still well below normal).
Mostly clear skies will allow for another cold night with near
freezing temperatures possible in the Western Magic Valley and
parts of the Upper Treasure Valley east of Boise by Sunday
morning. Sunday is continued dry with high temperatures warming
another 3 to 6 degrees from today. Open terrain will see breezy
conditions develop each afternoon as north-northwest flow aloft
mixes to the surface.

LONG TERM...Sunday night through Friday...Dry with a warming
trend. Sunday night through Tuesday our area will be under
northerly flow aloft on the eastern flank of an upper level ridge
centered off the west coast. This pattern will keep temperatures a
few degrees below normal. High and mid level clouds embedded in
the flow will keep skies partly cloudy Sunday night into Tuesday,
but no precipitation is expected. Temperatures will be near normal
on Wednesday and slightly above normal Thursday and Friday as the
ridge moves inland over the Intermountain Region.





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