Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 042249

Area Forecast Discussion
National Weather Service Salt Lake City UT
349 PM MST Mon Dec 4 2017

.SYNOPSIS...Strong high pressure will build into the area and
remain in place through the next seven days.


.SHORT TERM (Through 00Z Friday)...A few showers continue across
mainly the northern Utah mountains and far southwestern Wyoming.
These showers should end by 00Z. With snow cover across many of
the northern Utah valleys and clearing skies, expect patchy fog,
especially across the Cache Valley and the Wasatch Back.

Inversions conditions are expected to develop as high pressure
moves into the area over the next several days. While a weak
disturbance will cool mid-level temperatures a degree or two
Thursday, this should do little to dislodge the inversion. Expect
deteriorating air quality through midweek, especially across the
Cache and northern Wasatch Front.

.LONG TERM (After 00Z Friday)...A ridge upstream from Utah will
dominate the weather pattern across Utah through and beyond the
extended period. Temperatures will fluctuate very little in the
northern valleys from day-to-day while a gradual warming trend will
occur in the mountains through Saturday then a slight cooling Sunday
and Monday as a weak disturbance over the Rockies clips the area and
the 700mb temperatures cool 1-3 degrees.

Have added patchy fog to the Cache Valley for every night. This will
become a challenging forecast as we get closer to the weekend as a
stratus deck may form and never dissipate.

The temperatures in Dixie and by Kanab were warmed by a few degrees
Friday and Saturday to reflect the downsloping winds expected.


.AVIATION...Light west northwest winds will continue at the SLC
terminal into this evening before shifting to the southeast between
03-04Z. Cigs are expected to remain below 7K ft AGL through 00Z, but
there is a 40 percent chance that cigs remain below 7K AGL until 01-





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