Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
928 PM MDT Tue Sep 27 2016
Synopsis...high pressure will break down and shift east tonight
as a weak storm system moving up from the south begins spreading
moisture back to the area. This moisture will reach northern Utah by
Wednesday evening and remains across the area into the weekend.
Discussion...high pressure remains centered over northern Utah this
evening but will shift northeast in to Wyoming overnight as a low
pressure system over northwest Mexico lifts into the Desert
Southwest. Clouds and showers across Arizona today will approach
southern Utah tonight but for the most part dry and stable
conditions will continue tonight.
Showers will become more likely across southern by midday tomorrow
and spread into northern Utah during the evening hours. Because the
storm system is expected to open up and shear apart, neither dynamic
forcing nor convective instability parameters are particularly
impressive. However, pwats of 0.7-0.8 inches should provide ample
moisture to feed scattered showers/thunderstorms. Remnants of the
storm system will continue to impact the area through Thursday while
pwats continue to increase as tropical moisture spreads into the
No updates this evening.
Aviation...southeasterly winds will become established at the slc
terminal by 04z and continue through Wednesday morning.
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