Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 241541

Area Forecast Discussion
National Weather Service Salt Lake City UT
941 AM MDT Sat Mar 24 2018

.SYNOPSIS...A weak cold front will cross northern Utah today. A
cold upper trough will cross the region Sunday into Monday. High
pressure will bring a gradual warming trend for the middle to
latter portion of next week.


.DISCUSSION...Southwesterly flow aloft continues to prevail across
the Intermountain West this morning, downstream from an upper low
spinning off the Pacific Northwest coast. A shortwave trough is
noted lifting through the interior Pacific Northwest/northern
Rockies, with a trailing surface front currently extending into
northwest Utah. The tail end of this ejecting shortwave coupled
with convergence along the low level baroclinic zone is helping to
maintain showers across northwest and north central Utah. As this
boundary continues to sag southeast, may see these showers spread
into the Wasatch Front this afternoon, particularly north of

Meanwhile a thick canopy of cirrus has spread across much of
central and southern Utah, resulting from moist air being forced
over the Sierra Crest. This will likely continue through much of
the day but thin a bit as the afternoon wears on. Updated to
increase cloud cover over southern/southern Utah as well as the
central and southern Wasatch Front for late morning through

The upstream upper low is forecast to turn inland and evolve into
an open wave as it translates through the Great Basin Sunday.
Large scale ascent ahead of the trough axis coupled with low-mid
level frontogenesis along the existing boundary across northern
Utah should allow for a band of snow along this slow moving front
Sunday into Sunday evening. 700mb temps in the -10C to -12C range
in the wake of this front Sunday afternoon should quickly drop
snow levels to the valley floors of northern and central Utah,
however given most of this snow should occur during the daylight
hours suspect impacts will be fairly minimal in the valleys, but
could pick up significant snowfall in the higher terrain, and will
need to consider the need for winter headlines with the afternoon


.AVIATION...Moderate south winds will persist at the SLC terminal
through mid morning before a cold front shifts to the northwest,
expected around 18z. Lowering ceilings to near 6000 ft AGL through
the afternoon with increasing scattered to isolated showers. A
late wind shift to the southeast is anticipated by 04z this





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