Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
801 PM MST Wednesday Dec 17 2014
Synopsis...a series of weak weather systems will cross the
region through Thursday evening...with weak high pressure expected
for Friday. Unsettled weather returns Friday evening through the
weekend...especially across northern Utah.
Discussion...mostly cloudy skies continue across Utah and
southwest Wyoming this evening...as a broad trough persists across
the western Continental U.S.. the strongest shortwave in the region this
evening is moving through Arizona and New Mexico...with another
wave expected to dig into Arizona through the day Thursday.
This pattern leaves most of the County Warning Area in a moist airmass but with
no significant synoptic scale forcing to speak of...except
perhaps across the far south. Highest probability of precipitation during the overnight
hours tonight are focused on the higher terrain of central and
southern Utah...which seems about right considering latest model
trends and light precipitation recorded at snotel sites early this
Weak drying and warming looks to be on tap for Friday...as a low
amplitude shortwave ridge migrates across the area. This break is
short lived...as clouds return Friday afternoon and a chance of
precipitation returns to the north Friday evening. With a moist northwest
flow settling over the area...this northern mountain precipitation will
likely persist at varying rates through the weekend and into
Monday. Otherwise...expect cloudy conditions with increasing flow
through the middle of the forecast period.
The forecast for tonight looks fine and no updates are planned for
Aviation...light west to northwest winds will continue at the kslc
terminal through 03-04z before returning to the south. Ceilings are
expected to fall to near 7000 feet above ground level tonight...with occasional
reductions to near 6000 feet above ground level possible through Thursday morning.
For more information from National oceanic and atmospheric administration/S National Weather Service visit...
http://weather.Gov/saltlakecity (all lower case)
For frequently asked questions about the area forecast discussion
http://weather.Gov/saltlakecity/general/afd_faqs.Php (all lower case)