057 
FXUS65 KBOI 020228
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
828 PM MDT Fri Oct 1 2021

.DISCUSSION...No updates to the forecast. A weak trough which
brought mid to high clouds and virga to our region today will 
exit tonight with clearing skies in its wake. A trough to our 
north this weekend will spread scattered high clouds across our 
area with no impacts. An upper level ridge centered to our 
southwest will create very pleasant conditions over the weekend. 
Highs on Saturday will be a couple degrees above normal, warming a
few more degrees on Sunday, while lows will be seasonably cool. 
Winds will be light through the weekend.

&&

.AVIATION...VFR. Skies clearing overnight with a few high clouds
on Saturday. Surface winds: variable less than 10 kt. Winds aloft
at 10k feet MSL: southwest to northwest 5-10 kt.

Sunday Outlook...VFR with mostly clear skies. Light winds. 

&&

.PREV DISCUSSION...
SHORT TERM...Tonight through Sunday night...Small changes from 
previous discussion. A weak shortwave trough will exit southwest 
Idaho this evening. Zonal flow will bring dry and mostly clear 
conditions through Sunday night. Temperatures will be slightly 
above normal throughout the weekend. High temperatures will be in
the mid 70s this weekend, with scattered high clouds throughout 
southwest Idaho on Friday and Saturday and southeast Oregon on 
Sunday. Overnight low temperatures will reach the low to mid 30s 
in southeast Oregon and the mid 30s to low 40s in southwest Idaho 
through Sunday.


LONG TERM...Monday through Friday...Ridge of high pressure 
continues to amplify east of the forecast area bringing continued 
dry and warming conditions. This will remain in place through 
Tuesday with the warmest values expected Tuesday afternoon when 
values will reach around 10 degrees above normal. An area of low 
pressure continues to lift northeast through the Desert Southwest as 
a trough also moves east from the Pacific Northwest. The system 
originating from the south could produce a few light showers across 
the eastern portion of the forecast area, though guidance has moved 
its path further east with a lessened impact. The Pacific Northwest 
system however is still on track to impact the area as early as 
Wednesday with a few showers over the higher terrain. As the system 
moves further over the forecast area on Thursday, expect cooler 
temperatures, and additional showers across the area with all 
elevations seeing a potential for some precipitation. This system 
looks to lower snow levels as it arrives, helping to produce some 
mountain snowfall through Friday, though accumulation remains in 
question.  

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.
OR...None.

&&

$$

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DISCUSSION...ST
AVIATION.....ST
PREV SHORT TERM...SA
PREV LONG TERM....KB