Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 110304

Area Forecast Discussion
National Weather Service Salt Lake City UT
804 PM MST Sun Dec 10 2017

.SYNOPSIS...The strong and persistent high pressure aloft will
remain the dominant weather feature across the western states
through at least the middle of this week.


.DISCUSSION...Strong and persistent high pressure aloft across
the western CONUS will continue to dominate the weather over UT
thru mid week.

Expect little if any change to the persistent inversions and
resultant temperature distribution. The only forecast problem
would be how much the stratus/fog that formed west of the Great
Salt Lake last night expands over the next few nights and how soon
it spreads into the Wasatch Front. This patch of stratus/fog did
not entirely dissipate today and suspect it could expand enough by
Monday or Tuesday night, along with a patch over Utah Lake.
Meanwhile the stratus and fog has become entrenched in the Cache
Valley with the diurnal temperature spread only 6 deg today.

The 18z GFS was not quite as cold as the 12z EC with the grazing
short wave that drops south to the east of UT Wed night, but it
could still provide just enough stirring to disturb the stratus in
the Bear Lake Valley. Don`t see this feature having much impact

This same GFS run was also a little sharper and colder with the
Sat short wave but confidence remains very low in the guidance
past Fri, especially with the EC showing this as a very low
amplitude wave that mainly passes to our north.

No updates planned.


.AVIATION...At the SLC terminal, MVFR conditions in haze are
expected to prevail through the night and into Monday morning,
and will occasionally dip into IFR. Light and variable winds are
expected to shift to the southeast between 04Z and 05Z.





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