Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
934 PM MDT Monday Aug 29 2016
Synopsis...a ridge of high pressure over the Great Basin will
hold in place through Tuesday, before shifting east on Wednesday.
An upper level trough of low pressure will move across the region
Discussion...mid level ridging remains centered across the
forecast area this evening maintaining a mild and dry airmass
regionwide. Shallow high based convection which fired over the
higher terrain earlier has since dissipated, with only a broken
canopy of cirrus spilling into the northwest corner of Utah. This
ridge is forecast to slowly begin sliding east Tuesday, eventually
opening the door for high based moisture to spread into the
forecast area for the latter half of the week. In the near term
have updated to remove evening wording from the forecast, which
otherwise looks in good shape.
Aviation...southerly winds with VFR conditions will prevail at
kslc through the morning hours Tuesday.
Fire weather...high pressure aloft will maintain a drying and
warming trend through midweek. Low relative humidity and largely clear skies are
expected through tomorrow with cloud cover gradually increasing
Wednesday ahead of an approaching Pacific trough.
A lobe ejecting from this trough will graze northwestern Utah
Wednesday evening bringing gusty southerly winds and high based
showers or isolated storms capable of strong but brief outflow winds
but minimal rainfall to northern zones 478/479. Thursday looks to be
the most active day regarding both increasingly gusty southerly
winds across the western valleys...and high based storms with
minimal rain potential most all areas during the afternoon/evening
Gusty winds and a continuation of low humidity will continue Friday
with the bulk of storm potential shifting over eastern portions of
the district...this as a cold front approaches from the west.
Passage of this front across the northwest Sat/sun will maintain
gusty southerly winds over the south and east into and likely
through the weekend.
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