Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 231751

Area Forecast Discussion
National Weather Service Salt Lake City UT
1051 AM MST Tue Jan 23 2018

.SYNOPSIS...High pressure will return midweek before a fast
moving storm system impacts the area Thursday into Friday morning.
High pressure is expected to return for the upcoming weekend.


.DISCUSSION...Stratus with occasional patchy fog continues across
portions of northern Utah. Expect stratus and fog to gradually
diminish through early afternoon.

As high pressure continue to build into the area, associated mid-
level warm air advection will increase 700mb temperatures from
near -10C across northern Utah to -3C by Wednesday morning. Snow
cover persists across many of the valleys of northern Utah, so
expect at least a slight increase in haze by Wednesday afternoon
as inversion conditions increase.

Strong southwesterly flow ahead of the next storm system should
help to put a quick end to this inversion event Thursday though
smaller basins may struggle a bit.

Updated the forecast to better match sky grids to current location
of stratus. Will update the maximum temperature for southwestern
valleys to lower toward current trends as Milford and Cedar City
are still below 20F and have significant snow cover.


.AVIATION...VFR conditions are expected throughout the day at the
SLC terminal. Cigs around 6000 feet AGL are expected to dissipate
between 19Z and 21Z, but there is a 30 percent chance the lower cigs
will hang around longer than expected. Southeast winds are expected
to shift to the northwest between 18Z and 20Z.





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