Area Forecast Discussion
Issued by NWS Salt Lake City, UT
FXUS65 KSLC 281706
Area Forecast Discussion
National Weather Service Salt Lake City UT
1006 AM MST Mon Nov 28 2016
.SYNOPSIS...A cold Pacific storm system will cross the region
today. A trailing cold northerly flow will follow through
midweek, with another storm system possible late in the week.
.DISCUSSION...Moderate to occasionally heavy snow continues this
morning across areas favored in westerly/southwesterly flow across
portions of northern and western Utah. A shortwave/mid-level
front will cross the state in the next 2-3 hours, shifting from a
warm air advection scenario to a cold air advection,
northwesterly flow regime. The heaviest snow will fall on areas
favored in northwesterly flow this afternoon/evening including
eastern benches along the Wasatch Front.
Lake effect snow continues to be a concern later this evening into
the overnight hours. Much of the high resolution guidance
continues to indicate a lake band/lake enhanced convection will
develop near sunset and impact western Salt Lake County and the
Tooele Valley given the shift to more northerly flow by this
later this evening. Any lake band/lake enhancement will bring
increased snow totals if it is persistent. Most of the ingredients
for a lake enhancement/banding will be present this evening but
would like to review additional guidance this morning.
Currently, the winter weather advisory for the Great Salt Lake
Desert (mainly the I-84 corridor near the Idaho border) and Uinta
County Wyoming expire at 11 AM. While additional light snow may
occur in both areas for after 11 AM, will likely allow these
advisories to expire. All other warning/advisory products look on
track at this time.
Updated snow amounts and sky grids to match current trends more
closely. Future updates are likely given the dynamic weather
situation on hand.
.AVIATION...IFR conditions at KSLC terminal will persist through the
early afternoon hours with periodic snow showers reducing vis and
ceilings, with intermittent MVFR conditions. Surface winds are
expected to shift to northwest between 19z - 21z and will become
gusty. Brief periods of LIFR conditions in snow this afternoon are
expected. Lake effect bands that would impact the terminal could
form early in the evening, but are expected to become more showery
while shifting off to the west around mid-evening. 2 to 5 inches of
snow accumulation is expected on untreated surfaces today into
tonight, with the greatest accumulation potential occurring late
afternoon into the evening as the sun angle fades.
UT...Winter Storm Warning until 5 AM MST Tuesday for UTZ007>010-517-
Winter Storm Warning until 11 PM MST this evening for UTZ001>004-
Winter Weather Advisory until 11 AM MST this morning for UTZ005.
Winter Weather Advisory until 11 PM MST this evening for
WY...Winter Weather Advisory until 11 AM MST this morning for WYZ021.
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