Scientific Forecaster Discussion
fxus65 kslc 191448
Area forecast discussion
National Weather Service Salt Lake City Utah
848 am MDT Tue Jun 19 2018
Synopsis...northern Utah and southwest Wyoming will stay
unsettled and relatively cool today as a low pressure system moves
through. High pressure will bring a warming and drying trend
Wednesday into Thursday before a cooler and more unsettled pattern
develops for the upcoming weekend.
Discussion...the storm system that had been over the Great Basin
is now making its way across northern and central Utah, albeit in
a weakened state. Some showers continue, primarily along the
Utah/Idaho border and in southwest Wyoming. Dynamics will not be
as favorable today given the weakened system, but still am
anticipating additional showers developing over far northern
portions of the forecast area this afternoon. Northern Utah will
also remain under a relatively cool airmass behind the front,
resulting in another day of maxes around 5f below seasonal
normals. Southern Utah will remain dry, stable, and relatively
The trough will exit the area tonight, allowing high pressure to
move in for Wednesday into Thursday morning. This will bring about
a quick warming trend. This warming will be greatest over northern
Utah and southwest Wyoming, but most locations will see maxes at
least 10f above seasonal normals by Thursday afternoon. The ridge
is expected to flatten Thursday afternoon as a weak trough moves
over the top of it. This will bring an outside shot of some
showers for northern Utah along with a bit of cooling. The
unsettled weather should continue through the weekend, with
another storm system moving through.
No updates expected to the forecast this morning.
Aviation...the slc terminal will see VFR conditions throughout
the day. Northwest winds are expected to continue during the
daytime hours, but there is a 10 percent chance of some erratic
winds if showers develop in the vicinity of the terminal.
Fire weather...an upper low moving east across the northern
rockies will maintain a fairly cool and dry airmass across the
region today. A chance of showers and thunderstorms will continue
today through this evening across northern Utah, mainly north of
I-80. High pressure will build over the region Wednesday, before
shifting east Thursday. This will allow for a considerable warming
and drying trend region-wide. A cooler and more unsettled pattern
will develop for the weekend.
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