990 
FXUS65 KBOI 101555
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
955 AM MDT Wed Oct 10 2018

.DISCUSSION...Skies are mostly cloudy over the area, with a few 
breaks in cloud cover from Emmett to Meridian to southern Ada 
County. As a weak upper level wave moves southeast toward the 
mountains of central Idaho this afternoon, we will see clouds 
continue mainly over the Idaho side, with some clearing on the 
Oregon side and into the Lower Treasure Valley in both Oregon and 
Idaho. Showers will spread into the mountains late this afternoon
and tonight with the approach of the upper level wave, and a 
little reinforcing of cold air will occur as well, keeping 
temperatures well below normal today and tomorrow. All this is 
well-covered by the current forecast, and no changes are 
anticipated this morning.

&&

.AVIATION...MVFR ceilings in portions of Idaho with mountain 
obscurations will continue through noon. Expect VFR ceilings after
18Z as skies clear this afternoon. Surface winds northwest at 10 
kts or less. Winds aloft near 10 KFT MSL: N-NE 15-25 kts.

&&

.PREV DISCUSSION...
SHORT TERM...Today through Thursday...A low pressure system
centered over northern Utah will continue to bring widespread 
showers to south-central Idaho early this morning. The low will
continue to move east, resulting in decreasing shower activity
later this morning. A weak upper trough will move in from the 
north for scattered showers in central Idaho this afternoon and 
evening. The trough will exit to the southeast on Thursday with
showers ending by afternoon. Northerly flow will keep temperatures
cool through the period, although trending slightly warmer each 
day. 

LONG TERM...Thursday night through Tuesday...Weak ridging will 
develop over the area on Friday, with slightly warmer 
temperatures. A cold front will move across Montana on Saturday, 
bringing a reinforcement of cooler temperatures (around 10 degrees
below normal) through Sunday. Upper level ridging begins to build
across the Pacific NW on Tuesday which will bring a warming trend
with temperatures nearing normal by midweek. 

&&

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

&&

$$

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DISCUSSION...SP
AVIATION.....JB
PREV SHORT TERM...BW
PREV LONG TERM....KA