Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 072152
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
252 PM MST Thu Dec 7 2017

.SYNOPSIS...Strong high pressure will remain in place through
midweek next week.

&&

.SHORT TERM...AMDAR soundings through the day indicate the
inversion is gradually strengthening. This corresponds with air
quality sensor readings across northern and eastern portions of
the Salt Lake Valley as well as those in portions of the remainder
of the Wasatch Front and the Cache Valley. The inversion will
strengthen over the next several days as mid-level warm air
advection continues.

Stratus remains across the Cache Valley. This will continue into
the overnight hours. It`s possible the stratus will continue in
this area through the day tomorrow. Stratus has largely dissipated
near Utah Lake. This area will need to be monitored through the
evening.

Expect temperatures to remain stubborn near today`s highs through
at least the next several days for the Wasatch Front, the Cache
Valley and other areas prone to inversion conditions. High
pressure will remain across the West for the foreseeable future.

.LONG TERM...A high amplitude ridge remains over the Great Basin
heading into next week, leading to continued dry and stable
weather, with low level inversions remaining strong. Have moved
temperatures even closer to persistence, with little if any
warming in the northern valleys through the first half of the
week.

The 12Z runs of the GFS and ECMWF both promote a weak shortwave
trough dropping in from the north on Wednesday or Thursday. If this
came to pass, the wave might weaken inversions a bit, but is
unlikely to be strong enough to really mix the valleys or dissipate
much of the built-up pollution. Not biting off much on this current
solution, as models haven`t really been consistent yet with the
timing/placement of these shortwaves; either way, the prospects of
significant mixing or precipitation still look bleak through at
least next week.

&&

.AVIATION...Minimal operational weather concerns for the KSLC
terminal through the TAF period. Northerly winds are expected to
switch to the southeast by 03z this evening under clear skies.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

$$

Kruse/Schoening/Dewey

For more information from NOAA`s National Weather Service
visit... http://weather.gov/saltlakecity

For frequently asked questions about the Area Forecast Discussion
visit...
http://weather.gov/saltlakecity/general/afd_faqs.php



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