Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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100
FXUS65 KSLC 080445
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
945 PM MST Wed Dec 7 2016

.SYNOPSIS...A cold airmass will remain over the region through
tonight. A relatively mild but moist westerly flow will develop
Thursday and continue through the upcoming weekend.

&&

.DISCUSSION...A generally quiet night is in store for the area as mid
and high clouds start to increase under a west-northwesterly flow
aloft. Afternoon maxes were below freezing in most northern and
central valleys today so temperatures have already dipped to the
teens in many areas. The arrival of the clouds will help slow/stop
the temperature drop, but nevertheless cold temperatures will be the
norm tonight in many areas.

Moisture will continue to increase tomorrow as 700mb warm advection
strengthens. Precipitation will develop across northern and portions
of central Utah by tomorrow afternoon and continue through the end
of the week when a low-amplitude trough pushes a cold front into the
area. Abundant moisture will be in place to allow significant snow
accumulations in the mountains during this time, especially favoring
the mountains north of I-80 and other west-southwest-facing slopes.
Valleys will begin as snow tomorrow given the cold air in place at
the lower levels, but by Friday afternoon, many of these valleys,
with the possible exception of those along the Idaho border, should
start mixing with or changing to rain. Winter weather highlights are
currently in effect.

Forecast is in good shape, but made very minor updates mainly to
overnight mins and sky cover.

&&

.AVIATION...VFR conditions are expected at the SLC terminal
through the night with southeasterly winds prevailing. Lowering Cigs
after 15z Thursday ahead of approaching showers for nearby valley
and mountain locations.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Winter Weather Advisory from 3 PM Thursday to noon MST Friday
     for UTZ003-004-010.

     Winter Storm Warning from noon Thursday to 4 PM MST Saturday for
     UTZ007>009.

     Winter Storm Warning from 3 PM Thursday to 3 PM MST Friday for
     UTZ001-002-005-006.

WY...Winter Weather Advisory from 3 PM Thursday to 3 PM MST Friday
     for WYZ021.

&&

$$

Cheng

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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