Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
950 PM MST Friday Nov 28 2014
Synopsis...a mild southwest flow will continue across the Great
Basin into Saturday. A cold front will drop into northern Utah
Saturday night into Sunday...with another system possible by the
middle of next week.
Discussion...a west-southwest flow remains in place over Utah this
evening as axis of low-amplitude ridge has already slid east of the
area. Temperatures at this time are still relatively mild across
portions of northern and western Utah after the very warm afternoon
where those areas saw maximum temperatures 15-25 degrees above normal.
Thicker clouds are starting to fill in across northern Utah now.
Additionally...enhanced southerly winds are still observed in some
western valley locales. The combination of clouds and winds along
with the warm airmass in place will keep overnight mins elevated
again across portions of the north and west. Eastern valleys did not
mix as well...and with mostly clear skies again tonight...many of
those areas will fall below freezing once again.
An upstream trough near Vancouver Island will drop south into the
Pacific northwest states before sliding across Idaho and Montana
over the weekend. This trough will sag a cold front into northern
Utah beginning tomorrow night...accompanied by a plume of moisture
to bring valley rain and mountain snow. Ahead of the
front...temperatures tomorrow will remain mild...but should be a few
degrees cooler than today. This is due to 700 mb temperatures lowering
in response to the falling heights...although south winds will again
promote mixing again in the western valleys. The cold front will
make it as far south as central Utah where it will linger through
Updated forecast mainly to tweak overnight mins...sky and winds
based on current observational trends.
Aviation...at the slc terminal...operational weather concerns are
minimal under VFR conditions. Southeast winds will prevail through
the taf period. Occasional gusty winds can be expected through the
night...with these gusty winds becoming more likely after 16z.
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