Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
943 PM MDT Friday Sep 19 2014
Synopsis...a short-lived high pressure ridge will build over Utah
through tomorrow. A closed low off the Southern California coast
will then begin to lift northward and slowly cross the Great Basin
Sunday through Monday...promoting precipitation statewide.
Discussion...a mean longwave ridge is building over the western
Continental U.S. Except for the cutoff low which is currently in place off the
California coast. A few thunderstorms developed over Utah this
afternoon mainly across the high terrain of southern and eastern
Utah. However...these have waned now with the loss of solar
insolation and the drier air that has gradually moved into the area.
Expect a fairly quiet night tonight as the airmass will remain
generally dry and stable.
Good model agreement still in place regarding the evolution of said
upper low. Expect it to begin to eject inland tomorrow...drawing
moisture back into southern Utah. A few showers will begin to
develop again across southwest Utah tomorrow afternoon. Showers will
become more widespread across the forecast area Saturday night into
Sunday with the approach of the low and the associated jet nosing
into Utah. Lingering showers will continue across the north into
Updated the forecast mainly to reduce pop/sky for the remainder of
Aviation...light southerly winds expected to prevail at the kslc
terminal after 04 or 05z...and continuing through Saturday morning.
Otherwise expect VFR conditions next 24 hours.
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