Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 110401

Area Forecast Discussion
National Weather Service Salt Lake City UT
901 PM MST Tue Jan 10 2017

.SYNOPSIS...The next eastern Pacific trough just off the northern
California coast will track east across the Great Basin late
tonight through Wednesday. One final disturbance will impact the
region Thursday, followed by high pressure for the weekend.


.DISCUSSION...Strong and moist southwest flow has once again
settled over Utah and southwest Wyoming, with warm advection ahead
of a trough over the eastern Pacific. This has produced steady
snowfall this evening over the higher terrain of northern Utah,
as well as steady rainfall in the lower elevations near the
Utah/Idaho border, such as the Cache Valley.

This warm advection should continue through much of the night,
before a piece of the trough pushes through the Great Basin early
Wednesday morning. This should bring snow levels back down
closer to the valley floors through the day Wednesday, and produce
more widespread valley precipitation across the northern half of
the CWA.

Another thing worth noting is the increased southerly winds that
have surfaced across parts of northern Utah this evening,
including in the Salt Lake Valley, Tooele Valley, and west desert.
Some of the windier spots are in the advisory or low end warning
range, but have held off on issuing any wind advisories at this
time since most locations still have gusts in the 30s.

The forecast for tonight looks good, as do the ongoing winter
storm warnings. No updates are planned this evening.


.AVIATION...VFR conditions are expected to prevail at the SLC
terminal until prevailing rain arrives between 11-13Z. Cigs are
expected to dip below 7K ft around 04-05Z but there is a 30 percent
chance ceilings stay just above this mark until the onset of precip.
Southerly winds will periodic gusts over 30 knots will prevail
through the night and into the morning.


UT...Winter Storm Warning until 10 PM MST Wednesday for UTZ006>010.

WY...Winter Storm Warning until 10 PM MST Wednesday for WYZ021.




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