Area Forecast Discussion
Issued by NWS Salt Lake City, UT
FXUS65 KSLC 181745 AAA
Area Forecast Discussion...UPDATED
National Weather Service Salt Lake City UT
1145 AM MDT Tue Oct 18 2016
.UPDATE...Updated aviation section.
.SYNOPSIS...One last storm system will cross northern Utah and
southwest Wyoming today before high pressure returns for the
latter half of the week.
.DISCUSSION...Clouds increasing over northwest Utah this morning
as the last in a series of storm systems approaches. This system
will cross northern Utah and southwest Wyoming this afternoon
through this evening, bringing a final round of precip and a
reinforcing shot of cooler air. 700 mb temps as low as -5C would
drop snow levels to 6500-7000 feet over far northern Utah. Guidance
has trended a bit weaker and slower with this system since
yesterday with a farther north track. With this in mind, have
decreased the southern extent of the POPs this afternoon and
slowed down the introduction of POPs this morning. No additional
High pressure is on track to move in behind the exiting storm
system for Wednesday, remaining in place for the rest of the week.
Rapid clearing will allow temperatures to cool significantly
Wednesday night, bringing hard freeze conditions down to some
colder valleys. The ridge will keep dry conditions in place with a
gradual warming trend in temperatures through the weekend.
.AVIATION...Northerly winds are expected to prevail at the SLC
terminal through at least 04Z, though there is a slight chance of
variable winds due to nearby showers this afternoon. There is also
a 50 percent chance of temporary ceilings below 7000 feet after
18Z, with a most likely time frame of 21Z-01Z.
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