Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 190843
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
243 AM MDT Thu Jul 19 2018

.SHORT TERM...Today through Friday...Upper low over BC will bring
2-4 degrees cooling to our area today, then holding steady Friday.
Dry westerly flow aloft will keep monsoon moisture well to our south.
Smoke may enter Baker County from the west, and south-central Idaho
will also be locally smoky due to several wildfires there.  West
winds will be lighter than yesterday afternoon, with similar winds
expected Friday.

.LONG TERM...Friday night through Thursday...By late this week the
ridge of high pressure anchored over the western United States will
be influenced by a trough of low pressure entering the Pacific
Northwest. This trough will help to suppress the ridge slightly to
the south late Friday through the weekend. In addition to cooling
temperatures slightly and kicking up northwest winds, a minor
intrusion of monsoon moisture is anticipated for Friday evening and
again Saturday. This will allow for isolated showers and
thunderstorms, mainly near the Nevada border early in the weekend.
Mid range models are in good agreement that the ridge of high
pressure will rebound northward and dominate western weather for the
remainder of the period. Above normal temperatures and dry
conditions will be the rule for next week. Monsoonal moisture may
eventually begin working northward through the ridge and impacting
our area, but moisture timing and coverage is hard to pin down at
this point.

&&

AVIATION...Expect clear skies and VFR conditions, except in the
vicinity of wildfires where smoke will occasionally reduce
visibilities to MVFR especially during the morning hours. Surface
winds will be light and variable less than 10 kts at night, and
generally from a west or northwest direction at 10 to 15 kts this
afternoon. Winds aloft to 10k feet MSL will be westerly at 15-20kts.

&&

&&

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

&&

$$

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SHORT TERM...LC
LONG TERM....MC
AVIATION.....MC


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