Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 171455

Area Forecast Discussion
National Weather Service Salt Lake City UT
855 AM MDT Tue Apr 17 2018

.SYNOPSIS...A cold Pacific trough will exit the region today.
High pressure will return Tuesday night through midweek, followed
by the next storm system late in the week.


.DISCUSSION...Morning satellite imagery and objective analysis
depict a shortwave trough lifting across Utah with the associated
low level baroclinic zone having already pushed south and east of
the forecast area. Cold advection aloft associated with the mid
level cold pool continues to destabilize the airmass and support
both lake effect snow off the Great Salt Lake and Utah Lake, as
well as orographically forced snowfall along the terrain east of
the I-15 corridor within a moist northwest flow. This is being
enhanced a bit across southwest Utah by the trialing portion of
the aforementioned lifting wave.

As the mid level shortwave translates east of the region this
afternoon, mid level ridging will begin to become established
across the Great Basin, with downstream subsidence bringing an end
to any lingering precipitation by late this afternoon. This ridge
is forecast to translate eastward and slowly amplify through
Wednesday bringing a warming trend to the region.

In the near term winds are trending downward across the
southeastern portions of the forecast area, and will plan on
allowing going Wind Advisory to expire as scheduled at 9am, with
the Winter Weather Advisory for the southern Wasatch and central
mountain regions expiring at 10am. Will plan updates coincident
with these expiring headlines.


.AVIATION...Occasional snow showers may bring brief IFR
conditions to the SLC terminal through 16Z. Northerly winds will
continue at the terminal through the day. Expect ceilings to lift
above 6000 feet between 17-19Z.


UT...Wind Advisory until 9 AM MDT this morning for UTZ013-021.

     Winter Weather Advisory until 10 AM MDT this morning for UTZ008-




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