204 
FXUS65 KSLC 110305
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
905 PM MDT Wed Oct 10 2018

.SYNOPSIS...The progressive pattern will continue with a storm
system impacting primarily central and southern Utah tomorrow. The
area will see a temporary warming trend Friday into Saturday
before a cold storm system moves through late in the weekend. 

&&

.DISCUSSION...The storm system that brought rain and snow to
northern portions of the forecast area today is exiting to the
east this evening. Associated precip has diminished but mostly
cloudy skies remain in place over much of the area. This cloud
cover will stop mins for tumbling too much overnight, keeping 
those temperatures near seasonal normals for most locations.

A weak shortwave along the southern California coast is now 
making its way toward southern Utah, and the associated moisture 
and instability has allowed some light precip to develop over 
southern Utah. This valley rain and mountain snow will increase in
coverage and spread northward during the day as the weakening wave
slides into the state, phasing with a weak Pacific Northwest
trough passing just north of the area. Best coverage with this 
system will be over central and southern Utah, though cannot rule 
out some precip over northern Utah and southwest Wyoming as well. 

Associated precip is progged to diminish by Friday as the southern
system weakens and the northern system pulls away from the area,
allowing for temporary warming and drying in northwest flow.
Saturday should be the warmest day of the week, though maxes
should still run 5F or more below seasonal normals. 

A backdoor system moving into the area from Canada will likely
bring the coldest temperatures of the season so far as it moves  
into eastern Utah Saturday night into Sunday. Global models
disagree on the exact placement of the system, but all keep the
system on the dry side given where the air is coming from.

Updated the forecast earlier to decrease POPs for northern Utah
this evening. No additional updates planned. 

&&

.AVIATION...The SLC terminal will see VFR conditions through the
night with cigs remaining above 6000 feet AGL. Southeast winds are
expected to continue through the overnight hours. 

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

$$

Traphagan

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