462 
FXUS65 KBOI 100245
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
845 PM MDT Tue Oct 9 2018

.DISCUSSION...Showers continue to move through southwestern Idaho
this evening, with the best shower activity noted south and east
of Boise. Record breaking rainfall has been recorded in Boise,
with other city reports filtering in this evening. Still looks
that most activity should weaken through the overnight hours.
Another disturbance will develop some shower activity Wednesday,
especially across the higher terrain of central Idaho. No changes
needed to evening forecast.

&&

.AVIATION...Rain and high elevation snow showers continuing through 
10/06, except through 10/12Z in the Magic Valley and areas south. 
IFR fog and low clouds likely impacting some or all TAF sites 
through mid-morning. Conditions improving Wednesday mid-day. Surface 
winds: Northwest at 10 kts or less. Winds aloft near 10 KFT MSL: N-
NE 15-25 kts. 

&&

.PREV DISCUSSION...
SHORT TERM...Tonight through Friday Night...Upper level low over
the forecast area this evening will slowly drift into Utah by
morning. Trailing northwest flow will keep showers going in the
Magic Valley much of the night, but other areas should break up
and see some clearing. Snow level remains around 5500-6500 ft. 
Significant northwest winds this evening will start to diminish by
morning. Those winds may inhibit fog formation in some areas, but
believe there will be enough clearing that we added some areas of
patchy fog in the morning for all areas that received 
precipitation today. On Wednesday, a weak secondary wave dropping 
south, combined with moisture at the mid levels, will keep some 
showers possible over the Central Idaho Mountains through the 
afternoon, but should remain dry elsewhere. Northerly flow
continues through Thursday and Friday, which keep us from seeing
much warming, even though sunshine should be plentiful.
Temperatures remain 5-15 degrees below normal through Friday. 

LONG TERM...Saturday through Tuesday...Upper level ridge to the 
west and upper level trough over the Rocky Mountains will keep cool 
northerly flow over the forecast area through Monday. Temperatures 
around 5-10 degrees below normal. Moisture associated with this 
system will generally stay in Montana on Sunday. Upper level ridging 
develops across the West next week with temperatures warming to near 
normal by midweek.
&&

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

&&

$$

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DISCUSSION...KB
AVIATION.....EP
PREV SHORT TERM...TB
PREV LONG TERM....JS