Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 010408

Area Forecast Discussion
National Weather Service Salt Lake City UT
908 PM MST Wed Nov 30 2016

.SYNOPSIS...The next storm system will spread into northern Utah
tonight and slowly cross the region Thursday through Friday
morning. A stronger and colder storm system will impact the
region early next week.


.DISCUSSION...Evening water vapor imagery and objective analysis
depict a rather diffuse upper low rotating through the interior
Pacific Northwest/northern Rockies this evening. Ahead of this
wave weak warm advection has overspread northern Utah, which is
resulting in a few weak radar returns across northwest Utah. This
wave will gradually translate eastward tonight through Thursday,
with the southern extension of the mid level trough brushing
northern Utah late tonight through Thursday morning. A weak
surface front associated with this wave will cross northwest Utah
late tonight, then reach the Salt Lake Valley around sunrise
Thursday. Light snow is expected to develop across far northern
Utah late tonight, and likely into the northern Wasatch Front
before sunrise, before spreading across the remainder of the
central and southern Wasatch Front, mid to late morning, and
eventually central Utah by afternoon. Given that forcing is weak
and moisture limited, any accumulation is expected to remain

Updated the forecast to trim the southern extend of POPs
overnight, as well as lower POPs overnight across the
central/southern Wasatch Front by 10-20 percent.


.AVIATION...VFR conditions will prevail at the KSLC terminal with
cigs above 6000 feet through about 05-06z. Cigs are expected to drop
to or below 6000 feet AGL after that, with occasional MVFR
conditions in light snow beginning about 10-11Z. IFR conditions in
snow should develop with a cold front after about 15-16z lasting
until about 19-20z. There is a chance any IFR will not last more
than 1-2 hours however. Southerly winds are expected through the
night with a shift to northwest around 15z.





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