Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 201638

Area Forecast Discussion
National Weather Service Salt Lake City UT
938 AM MST Tue Feb 20 2018

.SYNOPSIS...A winter storm that impacted much of Utah will finally
move east across the state today. A series of weather
disturbances trailing this storm will impact the area for the
middle to latter part of the work week.


.DISCUSSION...The axis of the upper trough that has been responsible
for the recent weather is over Utah this morning and will slowly
shift east through the day. Although snow will be on a general
downward trend, the airmass remains unstable enough to keep some
lingering showers ongoing into the afternoon hours. Furthermore, the
cold airmass over the lake is still generating some weak lake-effect
showers, with westerly steering flow taking most of this through
northern Salt Lake through southern Weber Counties. Very little
additional accumulation is expected, however.

The cold airmass (around -20C at 700mb over northern Utah and -14C
across southern Utah today) will keep max temperatures today from
reaching freezing across all but the lower valleys of southern Utah.
There should be some clearing tonight, and given the cold airmass
and snow on the ground, overnight mins will be quite cold.

A weak trough that will cross the area tomorrow afternoon/night is
not expected to produce any significant snow but will keep
temperatures on the cold side. The next storm of interest will
impact mainly southern and central Utah Thursday night into Friday.

Updated the forecast mainly to make minor adjustments to Sky/PoP for
the rest of the day.


.AVIATION...Periodic light snow showers remain a potential through
18/19z at the KSLC terminal, but no additional accumulations are
expected. MVFR cigs will be slow to dissipate through early
afternoon, but as a whole conditions will continue to gradually
improve, with prevailing VFR conditions anticipated by 20z. Light
southerly winds are expected to become a light northwesterly wind
after 19z.





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